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Modulation of Pt-Cu interaction in Pt/Cu-SSZ-13 for selective catalytic oxidation of ammonia 认领 引用
1
作者 Jiaxing Li Yue Peng +7 位作者 Yifan Li Yunpeng Long William Orbell Chuan Gao Xiao Zhu Xing Yuan Lin Chen Junhua Li 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第4期376-387,共12页
Modulating the potent oxidative nature of Pt sites is the central strategy for optimizing the selective catalytic oxidation of NH3(NH3-SCO).The primary challenge is to suppress byproduct formation(N2O,NOx)... Modulating the potent oxidative nature of Pt sites is the central strategy for optimizing the selective catalytic oxidation of NH3(NH3-SCO).The primary challenge is to suppress byproduct formation(N2O,NOx)while preserving the intrinsic activity for N2 production,a balance governed by the metal-support interaction.Herein,a facile physical-mixing strategy is demonstrated to engineer a Pt/Cu-SSZ-13 catalyst that simultaneously establishes a moderate Pt-Cu interaction while preserving the integrity of isolated Z2Cu sites.This catalyst demonstrates superior performance,achieving 98% NH3 conversion at 180℃ and over 90% N2 selectivity(280-300℃),outperforming its coun-terpart prepared by intensive grinding.It also exhibits exceptional hydrothermal stability(750℃,10 h).Electronic structure and in-situ spectroscopy results reveal that the Pt-Cu electronic interaction tunes the reactivity of Pt sites to selectively catalyze the formation of *NOx intermediates.Concurrently,the preserved Z2Cu sites act as distinct active centers for NH3 adsorption,which then readily reduce these intermediates to N2. 展开更多
关键词 Cu-SSZ-13 Internal-selective catalytic reduction mechanism NH3-selective catalytic oxidation N2selectivity enhancement Hydrothermal aging resistance
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Diameter-Transformed Fluidized Bed-Based Catalytic Reaction Engineering and Industrial Application 认领 引用
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作者 Youhao Xu Bona Lu +1 位作者 Mingyuan He Wei Wang 《Engineering》 SCIE EI CSCD 2026年第1期244-256,共13页
In response to the critical national demand for upgrading automotive gasoline quality,the concept of dual reaction zones was developed to intensify both olefin generation and conversion.The successful largescale imple... In response to the critical national demand for upgrading automotive gasoline quality,the concept of dual reaction zones was developed to intensify both olefin generation and conversion.The successful largescale implementation of this process has yielded substantial economic benefits and spurred the invention and systematic study of the diameter-transformed fluidized bed(DTFB)reactor,leading to a suite of new catalytic processes.This study begins with the conceptual origins of the DTFB reactor.By analyzing unimolecular and bimolecular mechanisms in hydrocarbon catalysis,the key conditions necessary for maximizing target products are identified.Furthermore,it elucidates the scientific and technological challenges in applying diameter variation to partition the reaction section,highlighting that the primary challenge lies in achieving precise coupling between flow and reaction multimodalities,which necessitates a generalized drag model for accurate prediction of flow regime transitions.Since flow structure is influenced by both macroscopic parameters and local dynamics,a two-way coupled energy minimization multi-scale(EMMS)drag model and a corresponding multi-scale computational fluid dynamics(CFD)approach have been proposed,laying a theoretical foundation for quantitative design of diameter-transformed sections.The subsequent development of ancillary technologies has provided the necessary engineering safeguards for flexible control of temperature,density,and gas-solid contact time in each zone,ultimately enabling the industrialization,large-scale operation,and long-term stability of DTFB-based catalytic technology.Finally,the study outlines several typical processes and their application performance,and prospects future work. 展开更多
关键词 Diameter-transformed fluidized bed Catalytic cracking Maximizing iso-paraffins Multi-scale simulation Catalytic reaction engineering
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One-pot,Catalytic Asymmetric Reductive Bischler–Napieralski-Type Reaction of Amides:An Enantioselective Entrance to Biologically Active 1-Substituted Tetrahydroisoquinolines 认领 引用
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作者 Lu Guangsheng Han Zeng +1 位作者 Ye Jianliang Huang Peiqiang 《化学学报》 SCIE CAS CSCD 北大核心 2026年第4期476-483,共8页
Herein,we report the one-pot,catalytic asymmetric reductive Bischler-Napieralski-type reaction of amides as the first demonstration of a new strategy for the asymmetric reductive transformation of amides,which allowed... Herein,we report the one-pot,catalytic asymmetric reductive Bischler-Napieralski-type reaction of amides as the first demonstration of a new strategy for the asymmetric reductive transformation of amides,which allowed for the one-pot,enantioselective access to tetrahydroisoquinoline(THIQ).The method features a tandem sequence involving the Tf2O/2-F-Pyr.-promoted Bischler-Napieralski dehydracyclization and an aqueous Noyori-type catalytic asymmetric transfer hydrogenation(CATH).By this one-pot method,a variety of THIQ derivatives were synthesized in high yields and in excellent enantioselectivities.This protocol accommodates N-arylethyl aromatic amides bearing either electron-donating or electron-withdrawing groups on the acyl moiety,and N-arylethyl aliphatic amides.The synthetic utility of this methodology was demonstrated via the efficient,catalytic enantioselective synthesis of four alkaloids:(S)-salsolidine,(S)-laudanosine,(S)-xylopinine,and(S)-N-norlaudanidine,and medicinal agent ACT-335827.Additionally,formal syntheses of alkaloid(S)-cryptostyline III and medicinal agents such as almorexant were achieved. 展开更多
关键词 amides amide activation tetrahydroisoquinolines alkaloids reductive Bischler-Napieralski-type reaction catalytic asymmetric transfer hydrogenation catalytic asymmetric synthesis
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Accelerated activation of ozone on Fe-doped MnO2for highly efficient ozone catalytic oxidation of ethyl acetate 认领 引用 被引量：1
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作者 Ning Wu Ming Ouyang +7 位作者 Lei Liu Chuying Qiu Ning Wang Peirong Chen Junliang Wu Xiaofei Song Mingli Fu Daiqi Ye 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第3期638-646,共9页
Ozone catalytic oxidation(OCO)is a promising technology for controlling malodorous pollution,effectively removing low-concentration oxygenated volatile organic compounds(OVOCs)at low temperatures.However,the catalytic... Ozone catalytic oxidation(OCO)is a promising technology for controlling malodorous pollution,effectively removing low-concentration oxygenated volatile organic compounds(OVOCs)at low temperatures.However,the catalytic performance of manganese oxides remains constrained by insufficient reactive oxygen species(ROS)and high humidity,particularly at low temperatures.To address this,a series of MMnO2catalysts were successfully prepared by introducing highly dispersed transition metals(M=Fe,Ce,Mo)into MnO2via an in-situ hydrothermal method,aiming to improve low-temperature performance.Among these catalysts,the FeMnO2catalyst exhibited the highest catalytic performance,achieving 100%conversion of 30 ppm ethyl acetate(EA)and a 92.78%mineralization rate at 70℃,along with exceptional stability and water resistance(12.8 vol.%).In situ characterization techniques have demonstrated that the introduction of Fe significantly weakens the Mn-O bond in MnO2.The formation of abundant oxygen vacancies facilitates the adsorption and activation of O3.Both 1O2and·O2-species serve as crucial ROS,promoting the effective mineralization of EA on the catalyst surface and reducing the generation of reaction intermediates.This study provides a significant foundation for the further development of catalysts targeting low-concentration OVOCs and for enhancing the practical low-temperature catalytic activity of transition metal oxides. 展开更多
关键词 Ozone catalytic oxidation Fe doping Oxygen vacancies Reactive oxygen species Ethyl acetate
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Pyrolytic/solvothermal synthesis of tubular g-C3N4@Ni Fe-layered double hydroxide for catalytic enhancement of hydrogen storage in LiAlH4 认领 引用 被引量：1
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作者 Riguang Cheng Zhaoyu Liu +6 位作者 Hengxin Zhang Pantrangi Manasa Hongge Pan Fen Xu Lixian Sun Federico Rosei Yan Wang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第5期1448-1460,共13页
LiAlH4is hindered for practical hydrogen storage by its high decomposition temperatures,slow kinetics,and poor reversibility.To address the kinetic issues,this study introduces a tubular g-C3N4-supported NiFe... LiAlH4is hindered for practical hydrogen storage by its high decomposition temperatures,slow kinetics,and poor reversibility.To address the kinetic issues,this study introduces a tubular g-C3N4-supported NiFe-layered double hydroxide(g-C3N4@Ni Fe-LDH)nanocomposite as a catalytic dopant for LiAlH4.The composite,synthesized via solvothermal and pyrolysis methods,features a welldefined tubular morphology(~3μm in length,~200 nm in diameter),which facilitates its homogeneous dispersion and intimate interfacial contact with LiAlH4during ball milling.Doping with 7wt%of this catalyst dramatically enhances the dehydrogenation kinetics of LiAlH4.The onset dehydrogenation temperature is lowered to 79.2℃,and 6.8wt% of hydrogen is released in two steps.Kissinger analysis reveals that the apparent activation energies for these steps are reduced by 43.0% and 54.8%,respectively,demonstrating significantly improved dehydrogenation kinetics.Mechanistic studies suggest that the synergistic effect between the g-C3N4support and NiFe-LDH,along with the potential in-situ formation of active interfacial species during dehydrogenation,contributes to this improvement. 展开更多
关键词 hydrogen storage materials dehydrogenation kinetics NiFe-layered double hydroxide catalytic enhancement
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Design and fabrication of choline-functionalized shaped polymer catalysts for efficient catalytic synthesis of sec-butanol 认领 引用
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作者 Miaomiao Cui Peixin Hong +4 位作者 Yaxin Cai Yongsheng Lin Xiaoyan Chen Ting Qiu Jie Chen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第6期138-146,共9页
Sec‑butanol(SBA)is an important industrial medium‑polar solvent,mainly used as methyl ethyl ketone precursor and in coatings,fuels,fine chemicals.Transesterification is its dominant synthesis route for economical feed... Sec‑butanol(SBA)is an important industrial medium‑polar solvent,mainly used as methyl ethyl ketone precursor and in coatings,fuels,fine chemicals.Transesterification is its dominant synthesis route for economical feedstocks and easy downstream separation.However,industrial homogeneous catalysts suffer from separation difficulties,equipment corrosion,and poor continuous operability,and heterogeneous catalysts often exhibit relatively low catalytic activity.To balance catalytic activity and industrial application,a heterogeneous catalyst was firstly prepared by anchoring choline‑based ionic liquids on swellable Ps‑Cl(optimized swelling enhanced active site accessibility).Then,choline‑functionalized supported shaped catalyst(Ps‑Ch[IM])was obtained via quaternization of macroporous styrene‑based polymers with N,N′‑dimethylethanolamine(DMEA)and ion exchange with imidazolide anion([IM]-).Under reaction temperature of 60℃,alcohol‑to‑ester molar ratio 5:1,catalyst dosage 5%(mass)and reaction time 240 min,Ps‑Ch[IM]achieved 26.60%sec‑butyl acetate(SBAC)conversion,surpassing reported literature results.DFT calculation and in‑situ DRIFTS confirmed that Ps‑Ch[IM]activates methanol(MeOH)via[IM]-and SBAC via the OH group in DMEA;subsequently,CH3O*attacks the C=O bond in SBAC and combines with CH3CO*to form MA,while the proton combines with*OCH(CH3)CH2CH3to yield the target product SBA.Moreover,Ps‑Ch[IM]shown stable performance in continuous fixed‑bed reaction with the yield of 20.86%after 1800 min,indicates industrial application potential. 展开更多
关键词 Catalytic reaction Sec-butanol Basic ionic liquid Supported catalytic material
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Optimizing energy efficiency in fluid catalytic cracking units with GA and NSGA-Ⅱ:A comprehensive simulation and multi-factor analysis 认领 引用
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作者 Rui Han Qingshan Guan +6 位作者 Leqi Gu Xiaoyan Sun Tophet Wongladprom Vissanu Meeyoo Jengshiun Lim Li Xia Shuguang Xiang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第5期169-180,共12页
The global pursuit of carbon neutrality demands innovative strategies to decarbonize energy-intensive sectors,among which energy-saving optimization represents one of the most critical measures.As one of the largest e... The global pursuit of carbon neutrality demands innovative strategies to decarbonize energy-intensive sectors,among which energy-saving optimization represents one of the most critical measures.As one of the largest energy consumers in refineries,the Fluid Catalytic Cracking Unit(FCCU)offers significant potential for energy savings and carbon emission reduction.This study presents a comprehensive simulation-optimization framework for enhancing the performance of FCCU,integrating process simulation,thermodynamic analysis,and evolutionary optimization under industrial operational constraints.Genetic Algorithm(GA)and Non-dominated Sorting Genetic Algorithm-Ⅱ(NSGA-Ⅱ)were employed for multi-objective optimization of energy efficiency,product yield,and economic revenue.A TOPSIS decision-making method was incorporated to identify the most favorable trade-off solutions from the Pareto front.Dual-objective optimization achieved balanced trade-offs between conflicting objectives.Specifically,the energy-yield optimization reduced energy consumption by 3.28%and increased product yield by 1.95%,resulting in a 9.63%decrease in energy use compared to the singleobjective yield maximization case.Similarly,the energy-revenue optimization reduced energy consumption by 1.17%and increased revenue by 0.25%,resulting in a 5.42%decrease in energy use compared to the single-objective revenue maximization case.Economic and environmental assessments confirm system-level decarbonization,with pollutant(CO2/SO2/NOx)emissions reduced by 2.30%(energy-yield)and 3.34%(energy-revenue),respectively.These results demonstrate the effectiveness of the proposed multi-objective framework and its potential as a transferable tool for performance enhancement and decarbonized,sustainable operation across FCCUs and broader refining systems. 展开更多
关键词 Fluid catalytic cracking unit Simulation Optimization Thermodynamics TOPSIS decision-making
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Mechanistic study on activity and SO2 tolerance of CeO2-coated ZrVOx catalysts for selective catalytic reduction of NOx with NH3 认领 引用
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作者 Mingyu Guo Ke Niu +5 位作者 Guolong Zang Shaoping Cui Qingling Liu Caixia Liu Boqun Liu Yingjie Zhao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第6期1813-1823,I0005,共11页
Since sulfur oxides in the engine exhaust usually lead to the catalyst deactivation,so SO2 resistance under low-temperature conditions serves as a critical performance criterion to the catalysts.A series of ZrVO_(x... Since sulfur oxides in the engine exhaust usually lead to the catalyst deactivation,so SO2 resistance under low-temperature conditions serves as a critical performance criterion to the catalysts.A series of ZrVOx@CeO2 catalysts with excellent catalytic activity and SO2 tolerance was synthesized using the combination of hydrothermal and precipitation methods for the ammonia selective catalytic reduction(NH3-SCR)reaction.In the range of 160-380℃,the NO conversion is consistently over 90%.Notably,with the addition of 200 ppm SO2,the NO conversion stabilizes at 90%within 10 h at 230℃.The CeO2 species are deposited as fine particles on the catalyst surface,forming irregular spherical protrusions.This morphology significantly increases the specific surface area,which in turn enhances the activation and adsorption of reactant.The incorporation of CeO2 modifies the electronic structure of the O 1s orbital,and generates a higher density of oxygen vacancies to maintain electrostatic equilibrium.In situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTs)shows that SO2 has little effect on the adsorption and activation of NO and NH3.Therefore,the ZrVOx@CeO2 catalysts exhibit excellent reducibility,effectively enhancing the catalytic performance.Overall,the main mechanism on the ZrVOx@CeO2 catalyst is the Langmuir-Hinshelwood mechanism. 展开更多
关键词 Selective catalytic reduction CeO₂ Vanadate Catalysts SO₂resistance Rare earths
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Lewis Acid-Base Interactions Enable Sustained Catalytic Activity for Polysulfide Conversion in Lithium-Sulfur Batteries 认领 引用
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作者 Mengchen Zhang Xiaojing Zhang +10 位作者 Qingbing Xia Long Jiang Lingfeng Liu Woying Li Guoqiang Ma Da Wang Changyu Liu Jianbo Jia Junhui Zhou Hao Chen Chao Xing 《Rare Metals》 SCIE EI CAS CSCD 2026年第1期839-851,共13页
Lithium-sulfur batteries(LSBs)face sluggish sulfur reduction reaction kinetics and severe polysulfide shuttling issues,which significantly limit their performance.In this work,a multifunctional separator with a 3D por... Lithium-sulfur batteries(LSBs)face sluggish sulfur reduction reaction kinetics and severe polysulfide shuttling issues,which significantly limit their performance.In this work,a multifunctional separator with a 3D porous framework featuring confined pore structures and selective adsorption capability is constructed to address these challenges.Within this separator,Lewis acid-base interactions between Ce-MOF-808 and lignosulfonate(SL)effectively regulate the Ce4+catalytic activity,thereby lowering the kinetic barrier and accelerating the conversion of short-chain polysulfides into insoluble Li2S during the liquidsolid transformation.Furthermore,SL prevents the accumulation of long-chain polysulfides near the Ce4+sites through localized electrostatic repulsion,avoiding catalyst poisoning and thereby maintaining continuous catalytic availability.These synergistic effects collectively enable long-lasting catalytic activity toward polysulfide conversion in LSBs,resulting in a fivefold enhancement in capacity and an impressively low capacity decay rate of just 0.033%per cycle over 500 cycles at 1C.This work underscores the transformative potential of Lewis acid-base interactions for enhancing sulfur redox kinetics and introduces a versatile methodology for designing advanced separators for LSBs. 展开更多
关键词 Lewis acid-base interactions lithium-sulfur batteries separator shuttling effect sustained catalytic activity
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Nanozyme-based catalytic therapeutics:Applications in infectious diseases,cancer therapy,and bone regeneration 认领 引用
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作者 Dechao Yuan Tianying Luo +10 位作者 Qiao Su Changxing Qu Meng Pan Jia Xu Mingyi Zhang Yuanchao Luo Renjian He Shiwei Liu Xiang Fang Hong Duan Zhiyong Qian 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期263-274,共12页
Nanozymes are nanomaterials with enzyme-like catalytic activities that have rapidly advanced in the biomedical field in recent years due to their high stability,low cost,and catalytic versatility.As promising alternat... Nanozymes are nanomaterials with enzyme-like catalytic activities that have rapidly advanced in the biomedical field in recent years due to their high stability,low cost,and catalytic versatility.As promising alternatives to natural enzymes,nanozymes have demonstrated unique advantages in infection control,cancer therapy,and tissue regeneration.This review systematically summarizes key advances in recent years in nanozyme-based catalytic therapeutics.We focus on their mechanisms and applications in combating bacterial,viral,and fungal infections via membrane lipid peroxidation,protein/genome damage,and biofilm disruption;in cancer treatment through chemodynamic therapy(CDT),tumor microenvironment modulation,and multimodal synergistic strategies;and in bone regeneration through antioxidant,anti-inflammatory,and osteoinductive functions.Moreover,we highlight the integration of nanozymes with hydrogels,scaffolds,and microrobotic systems to enhance therapeutic outcomes.Finally,current challenges such as targeting specificity,in vivo catalytic control,biosafety,and clinical translation are discussed to provide a comprehensive roadmap for future research and clinical development in catalytic nanomedicine. 展开更多
关键词 Nanozymes Catalytic therapeutics Infectious diseases Cancer therapy Bone regeneration
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Revealing low-temperature reaction mechanism of cobalt-doped CeO2 catalyst for catalytic removal of methyl mercaptan 认领 引用
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作者 Zijun Huang Xiaohua Cao +5 位作者 Huaiyu Xu Miao Lin Dedong He Dingkai Chen Jichang Lu Yongming Luo 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第3期811-821,I0003,共11页
Methyl mercaptan(CH3SH)is notorious for global air pollution owing to its odorous characteristics and adverse health effects.Although CeO2 is currently regarded as a promising catalyst for CH3SH decomposition... Methyl mercaptan(CH3SH)is notorious for global air pollution owing to its odorous characteristics and adverse health effects.Although CeO2 is currently regarded as a promising catalyst for CH3SH decomposition,the high conversion temperature followed by high energy consumption is still a bottleneck.Herein,the cobalt-doped CeO2 catalyst was synthesized by a facile one-pot preparation strategy and successfully reduces the decomposition temperature from 450 to 250℃.Further studies demonstrate that the excellent low-temperature catalytic activity of Co0.6Ce0.4O2-σis attributed to its abundant oxygen vacancies and reactive oxygen species.Oxygen vacancies promote the adsorption and dissociation of CH3SH,while reactive oxygen species facilitate the decomposition of CH3SH.Moreover,Co acts as a sacrificial agent for the adsorption of sulfur species in CH3SH,while Ce is responsible for the adsorption and activation of CH3SH as the active metal phase.Furthermore,the migration and transformation mechanism of CH3SH on the surface of Co0.6Ce0.4O2-δwas determined via in situ diffuse reflectance infrared Fourier transform spectra(in situ-DRIFTS).This work provides a new strategy to synthesize highperformance catalysts for decomposing sulfur-containing volatile organic compounds(VOCs)at low temperatures,which is beneficial to decreasing the energy consumption. 展开更多
关键词 CoxCeyO2-δ Methyl mercaptan Catalytic decomposition Oxygen vacancies Reaction mechanism Rare earths
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Impact of residual ions on catalyst structure and catalytic performance:A review 认领 引用
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作者 Yaofei Zhang Jiani Chen +4 位作者 Haotian Hu Jianghua Huang Jiafeng Wei Fukun Bi Xiaodong Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期82-92,共11页
Residual ions introduced during catalyst synthesis can significantly impact both the structure and performance of the catalyst.Despite their crucial role,the effects of these residual ions are frequently overlooked in... Residual ions introduced during catalyst synthesis can significantly impact both the structure and performance of the catalyst.Despite their crucial role,the effects of these residual ions are frequently overlooked in catalyst design and optimization.This review systematically surveys the characteristics and sources of typical residual ions in catalytic systems,including halogen anions,acidic anions,and alkali metal cations.It also examines their impact on both the supports and active metals of supported catalysts,as well as the alterations in surface,crystal structure,and chemical states of non-supported catalysts.The effects of residual ions on the performance of these catalysts in catalytic reactions such as oxidation and hydrogenation are discussed in detail.Additionally,the influence mechanism of residual ions on the catalysts is further explored,with a focus on their promotion and inhibition roles in catalytic processes,thus providing insights for the development of more efficient and durable catalysts.A summary finally provides an outlook on future approaches to advance catalyst preparation and mitigate the adverse effects of residual ions in catalysis. 展开更多
关键词 Residual ions Catalyst structure Catalytic performance Catalyst preparation Influence mechanism
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Thiosulfate leaching of gold:An review on novel catalytic systems 认领 引用
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作者 Qian LI Yue-hong ZHU +4 位作者 Yan ZHANG Xiao-liang LIU Shu-yi QIAO Yong-bin YANG Tao JIANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第4期1294-1319,共26页
Eco-friendly thiosulfate is a promising alternative to the high-toxic cyanide for gold extraction with copper-ammonia catalytic system being the most popular.However,the copper-ammonia catalysis causes the issues of h... Eco-friendly thiosulfate is a promising alternative to the high-toxic cyanide for gold extraction with copper-ammonia catalytic system being the most popular.However,the copper-ammonia catalysis causes the issues of high thiosulfate consumption,complex gold recovery process and ammonia pollution.An effective strategy to tackle these issues is to improve or replace the copper-ammonia system with a novel catalytic system(NCS).Various NCSs are classified and their current status and future prospectives are reviewed.The critical constituent factors of NCSs are summarized.The noteworthy developing trends of potential NCSs are also discussed.Furthermore,besides resin adsorption,other recovery methods such as solvent extraction deserve more attention to achieve selective gold recovery.Crucial insights into developing suitable NCSs to solve the existing challenges in the current thiosulfate leaching technology once and for all are offered,thus promoting its large-scale industrial application. 展开更多
关键词 gold non-cyanide gold lixiviant thiosulfate leaching novel catalytic systems transitional metal catalysis
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Catalytic property tuned ozone gas sensing performance of cobalt oxides 认领 引用
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作者 Qiuyi Zhu Jian Guan +3 位作者 Linghao Wu Ning Han Jinhan Mo Yunfa Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第3期141-150,共10页
Understanding the relationship between catalytic properties and gas sensing performance in metal oxide semiconductors is essential for elucidating reaction mechanisms and designing highly-sensitive,active materials.In... Understanding the relationship between catalytic properties and gas sensing performance in metal oxide semiconductors is essential for elucidating reaction mechanisms and designing highly-sensitive,active materials.In this study,cubic CoO with octahedral[CoO6]coordination,wurtzite CoO with tetrahedral[CoO4]coordination and spinel Co3O4with mixed[CoO6]and[CoO4]coordination were synthesized.Though cubic CoO showed higher catalytic activity at 20–100℃ and wurtzite CoO had higher activity at 60–100℃,the ozone sensing response of Co3O4was higher at the optimized working temperature of 60℃.In situ infrared reflectance spectroscopy revealed the presence of abundant intermediates in the catalytic process of Co3O4,benefiting the electron transfer and the resultant resistance change of the sensor.Furthermore,Co3O4calcined at 600℃ with 3 at.%Sn doping showed the highest sensitivity(response=55 to 1 ppm ozone)at 60℃ and excellent selectivity toward interfering gases,including formaldehyde,ethanol,acetone,and xylene.These findings infer that catalytic intermediates rather than decomposition efficiency play a more important role in gas sensing. 展开更多
关键词 Semiconductor gas sensor Ozone Cobalt oxide Sensing and catalytic properties Sn-doping In-situ infrared spectroscopy
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Revealing the influencing pathways and mechanisms of inorganic salts on the catalytic ozonation of petrochemical wastewater 认领 引用
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作者 Zhikai Qin Fang Wang +5 位作者 Yue Yuan Guoxin Ma Yin Yu Yutong Duan Ruiling Bao Changyong Wu 《ENGINEERING Environment》 SCIE EI CAS CSCD 2026年第1期235-249,共15页
The presence of inorganic salts poses a significant challenge to the effective removal of petrochemical wastewater during the catalytic ozonation. However, the mechanism by which inorganic salts influence the catalyti... The presence of inorganic salts poses a significant challenge to the effective removal of petrochemical wastewater during the catalytic ozonation. However, the mechanism by which inorganic salts influence the catalytic ozonation of actual wastewater remains unclear and controversial. This study investigated the effects of inorganic salts (Na2SO4 and NaCl) on the catalytic ozonation of petrochemical wastewater. The TOC removal rate decreased from 59.89% to 32.12%–35.80% as Na2SO4 concentration increased from 0 to 5–10 g/L, whereas increasing NaCl had a slight impact on the TOC removal efficiency. Similar trends were observed for the removal of UV254 and fluorescent organic substances. This is attributed to the superior ozone mass transfer enhancement and ·OH generation, as well as weaker inhibition of the adsorption process exhibited by NaCl compared to Na2SO4. Enhanced ozone mass transfer and elevated ozone concentrations promote direct oxidation by ozone molecules, reducing both the content and proportion of macro-molecule (molecular weight ? 3 kDa) matters in the effluent. Conversely, weakened adsorption impedes the mineralization of micro-molecule (molecular weight ? 3 kDa) fractions, leading to an increase in their content and proportion in the effluent. Our findings demonstrate that inorganic salts influence catalytic ozonation through a complex interplay of enhanced ozone supply, stronger direct oxidation, higher radical production, and hindered pollutant adsorption. These insights may guide future process optimization and catalyst design to improve the catalytic ozonation of saline petrochemical wastewater. 展开更多
关键词 Catalytic ozonation Inorganic salts Petrochemical wastewater Mass transfer Adsorption
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Recent advances in the catalytic removal of gaseous methyl mercaptan 认领 引用
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作者 Xiaofeng Liu Dongling Liu +3 位作者 Litong Peng Yuqin Lu Jingjing Zhao Wangchuan Xiao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第6期676-695,共20页
Methyl mercaptan(CH3SH)is a malodorous and toxic gas commonly emitted from petrochemical,pharmaceutical,and wastewater treatment industries.Due to its low odor threshold and contribution to secondary atmospheric po... Methyl mercaptan(CH3SH)is a malodorous and toxic gas commonly emitted from petrochemical,pharmaceutical,and wastewater treatment industries.Due to its low odor threshold and contribution to secondary atmospheric pollution,its effective removal is essential.Traditional methods,such as adsorption,absorption,biodegradation,and non-thermal plasma,often suffer from limitations in efficiency and stability.Catalytic technologies have garnered increasing attention for their high removal efficiency,low energy consumption,and environmental compatibility.This review highlights recent advances in the gas-phase catalytic elimination of CH3SH,focusing on reaction mechanisms,catalyst design,and performance metrics.Special emphasis is placed on strategies such as oxygen vacancy engineering,modulation ofmetal oxidation states,and interface/defect tuning to enhance catalytic activity and durability.Key performance factors are discussed,and current challenges are critically evaluated.Finally,future research directions are proposed to support the development of efficient and sustainable CH3SH abatement technologies. 展开更多
关键词 Methyl mercaptan(CH3SH) Catalytic technologies Oxygen vacancy engineering Reaction mechanism Air pollutant removal
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Ru clusters encapsulated with Al-rich zeolite for efficiently catalytic elimination of 1,2-dichloroethane 认领 引用
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作者 Xiaonan Guo Yuanzhe Yu +5 位作者 Runduo Zhang Shuting Wei Bin Kang Ying Wei Jingbo Jia Zhou-jun Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第1期10-22,共13页
The Ru-based catalysts with different preparation methods or supports were achieved and applied in efficientlycatalytic elimination of 1,2-dichloroethane(1,2-DCE).It wasfirstly found that the redox ability and chlorine... The Ru-based catalysts with different preparation methods or supports were achieved and applied in efficientlycatalytic elimination of 1,2-dichloroethane(1,2-DCE).It wasfirstly found that the redox ability and chlorine re-sistance of the catalyst could be improved by regulating the interaction between Ru and supports.Compared withother supports and conventionally impregnated methods,the Ru@ZSM-5 catalyst synthesized by the in-situ en-capsulation strategy exhibited an excellent low-temperature catalytic performance(T50=262°C,T90=327℃),superior stability in long-term test as well as ideal target products.The acidity,specific surface area,and in-teraction with precious metals of the supports have significant influences on the catalytic activity,and the Ruclusters inside the pore structures are more closely bound to the framework Al species,which promotes theoxidation behavior.The encapsulation strategy also significantly improves the Ru dispersion thereby facilitatesoxygen activation as well as Cl-containing volatile organic compounds(CVOCs)deep oxidation,and preserveslarge amounts of Brønsted acid sites to optimize the hydrolysis mechanism for purification of CVOCs.Subse-quently,the synergistic effect between metal redox and acidity is greatly optimized,thus extremely promotingthe catalytic efficiency of 1,2-DCE oxidation. 展开更多
关键词 Catalytic oxidation Encapsulated strategy Volatile organic compounds1,2-dichloroethane Synergistic effect
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Plasma-engineered activated carbon fibers for boosting sulfate selectivity and regeneration performance in room-temperature malodorous H2S catalytic oxidation 认领 引用
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作者 Yue Liu Linhong Wen +2 位作者 Mengyan Wang Jianxiao Yang Xin Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第7期255-263,共9页
Catalytic oxidation of H2S at room temperature has been regarded as a promising method for removing malodorous H2S pollution.However,most of the existing research has primarily focused on developing catalysts wi... Catalytic oxidation of H2S at room temperature has been regarded as a promising method for removing malodorous H2S pollution.However,most of the existing research has primarily focused on developing catalysts with high sulfur capacity,i.e.,high elemental sulfur selectivity,which was unfavored for the catalyst regeneration.The present work prioritizes efficient water wash regeneration as a key objective.A series of activated carbon fibers(ACFs)was synthesized using a synergistic strategy of"nitrogen dopingplasma defect engineering".The certain amount of nitrogen species ensured a certain level of sulfur capacity.The plasma defect engineering can result in the enhancement of surface acidity and defect density,which worked together to make the catalyst with high sulfate selectivity.The O2-plasma modified NH3-ACF-O10 catalyst achieved the best catalytic performance with appropriate sulfur capacity(0.21 g/g)and highest sulfate selectivity(85.40%).Importantly,it can be easily regenerated by water wash,and almost83.33%sulfur capacity can be recovered.Besides,superoxide radicals(O2·-)were identified as the primary reactive oxygen species for the reaction.And the reaction obeyed a Langmuir-Hinshelwood(L-H)like mechanism,i.e.,the reaction was proceeded via chemisorbed H2S and O2·-,which was adsorbed and activated by defect. 展开更多
关键词 Activated carbon fibers H2S catalytic oxidation Plasma defect engineering Sulfate selectivity Water regeneration
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Catalytic mechanism of inherent alkali and alkaline earth metals on energy crop char during the CO2gasification process 认领 引用
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作者 Yun Liu Zhen Bao +1 位作者 Yuan Zhang Peng Zhang 《ENGINEERING Chemical Engineering》 SCIE EI CAS CSCD 2026年第4期57-65,共9页
The catalytic mechanism of inherent alkali and alkaline earth metals is crucial for enhancing the gasification efficiency of energy crop char with CO2.In this study,the gasification reactivity and surface structura... The catalytic mechanism of inherent alkali and alkaline earth metals is crucial for enhancing the gasification efficiency of energy crop char with CO2.In this study,the gasification reactivity and surface structural characteristics were investigated using a combination of thermogravimetric analysis,Raman spectroscopy,X-ray diffraction,scanning electron microscopy,and X-ray photoelectron spectroscopy.Herein,the char samples were prepared from Arundo donax in a fixed-bed reactor.The results revealed that gasification reactivity of char-samples increased progressively as the temperature rose from 800 to 950℃.Importantly,despite acid washing inducing a more disordered carbon structure with a higher defect density,the reactivity of the treated char was significantly reduced at the same temperature.Kinetic analysis further quantified that the average activation energy of biochar increased from 164.30 to 210.85 kJ·mol-1after the removal of alkali and alkaline earth metals by acid washing.These results together indicated that the catalysis effects of alkali and alkaline earth metals played the key role on the gasification reactivity.Temperatureprogrammed desorption demonstrated that alkali and alkaline earth metals acted as catalytic active centers to optimize gasification reaction pathways by promoting carbon-oxygen surface active complex formation. 展开更多
关键词 char alkali and alkaline earth metals gasification catalytic mechanism
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Design,synthesis,DNA interaction,and dual catalytic properties of tetranuclear holmium(Ho)complex 认领 引用
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作者 GUAN Xiaofen KANG Liuqing +3 位作者 ZHANG Yingyue XUE Linjing LI Xinyu WANG Wenmin 《无机化学学报》 SCIE CAS CSCD 北大核心 2026年第7期1543-1554,共12页
A tetranuclear Ho(Ⅲ)-based complex[Ho4(L)2(dbm)6(CH3O)4](1)was synthesized via solvothermal methods,where HL=(E)-2-hydroxy-3-methoxy-N′-[(6-methoxypyridin-2-yl)methylene]benzohydrazide and Hdbm=dibenz... A tetranuclear Ho(Ⅲ)-based complex[Ho4(L)2(dbm)6(CH3O)4](1)was synthesized via solvothermal methods,where HL=(E)-2-hydroxy-3-methoxy-N′-[(6-methoxypyridin-2-yl)methylene]benzohydrazide and Hdbm=dibenzoylmethane.Structural characterization revealed that this complex is composed of four Ho3+ions,six dbm-ions,two L-ions,and four coordinated CH3O-ions.The interaction mechanisms between ligand HL,1 and calf thymus DNA(CT-DNA)were investigated by using UV-Vis spectroscopy,fluorescence titration,and cyclic voltammetry.The results indicated that 1 can interact with DNA via intercalation.Catalytic tests showed that 1 exhibits remarkable catalytic activity,capable of catalyzing the cycloaddition reaction of CO2 with epoxides and the Knoevenagel condensation reaction between malononitrile and aldehydes.CCDC:2488751. 展开更多
关键词 tetranuclear Ho(Ⅲ)‑based complex polydentate Schiff base DNA interaction catalytic performance CO2cycloaddition Knoevenagel condensation reaction
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