期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到11,368篇文章
< 1 2 … 250 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
The role of copper valence states in CuZnAl catalysts for CO2-to-methanol conversion 认领 引用
1
作者 QIU Zhengpu XU Yunzhao +11 位作者 WANG Peng TAO Xiaoxia ZHANG Huimin CHEN Yang LIU Yi YANG Hua CAO Fenghai FU Yajie WU Lizhi TANG Yu XU Xiaoying TAN Li 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第4期58-67,共10页
CuZnAl(CZA)is a classic industrial catalyst widely used for the synthesis of methanol from syngas,but its catalytic performance is not optimal for the hydrogenation of CO2 to methanol.Meanwhile,understanding the ca... CuZnAl(CZA)is a classic industrial catalyst widely used for the synthesis of methanol from syngas,but its catalytic performance is not optimal for the hydrogenation of CO2 to methanol.Meanwhile,understanding the catalytic mechanism of Cu species in the CZA catalyst remains a great challenge.In this study,we systematically investigated the valence state change of active Cu species in CZA catalyst and their influence on catalytic performance by modifying the catalysts with varying amounts of electron donor K,thus identifying the catalytic function of Cu species with different valence states.H2-TPR,XPS and HR-TEM characterizations reveal that the highly dispersed K species supported on CZA catalysts will inhibit the reduction of CuO,resulting in a small amount of Cu2O active species being produced under reaction conditions thus causing a decrease in catalytic activity.Furthermore,XRD and Cu LMM spectra show that the proportion of Cu0 in K-modified CZA catalysts increases with K loading,but a higher proportion of Cu0 species on the surface obviously promotes the reverse water gas shift(RWGS)reaction.According to the results of in situ infrared spectroscopy,CZA catalyst follows the reaction pathway mediated by HCOO*in the hydrogenation of CO2 to methanol. 展开更多
关键词 CO2hydrogenation CuZnAl catalysts methanol active species electronic promoter
暂未订购 下载PDF
Sulfur-engineered Ni single-atom catalysts for sustainable tandem CO2-to-chemicals conversion across pH-universal windows 认领 引用
2
作者 Jun-Kang Li Pei-Yao Wang +3 位作者 Jia-Lin Zhang Shu-Na Zhao Bo Li Shuang-Quan Zang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第7期732-738,共7页
Tandem CO2 electroreduction integrated with carbonylation reactions offers a promising pathway for transforming greenhouse gases into valuable chemical products.The development of efficient CO2-to-CO electrocata... Tandem CO2 electroreduction integrated with carbonylation reactions offers a promising pathway for transforming greenhouse gases into valuable chemical products.The development of efficient CO2-to-CO electrocatalysts operational across wide potential ranges is crucial to address renewable energy fluctuations and facilitate integrated cascade systems.Herein,a Ni single-atom catalyst(SAC)with sulfur doping in the second shell of Ni-N4 is reported.In situ measurements and theoretical calculations demonstrate that the incorporation S atoms not only modulates the electronic configuration of Ni active sites but also enhances H2O adsorption,enabling rapid CO2 hydrogenation into *COOH intermediates even at high potentials.Consequently,the Ni-N-S/CNS catalyst achieves a Faradaic efficiency for CO2-to-CO(FeCO)of 99.3% at-0.7 VRHE and maintains over 90%across pH-universal conditions with ultrawide potential windows:1400 mV(from-0.3 VRHE to-1.7 VRHE)in alkaline media,1200 mV(from-0.7 VRHE to-1.9VRHE)in neutral conditions,and 1000 mV(from-1.3 VRHE to-2.3 VRHE)in acidic environments.Remarkably,this catalyst enables the tandem CO2RR and N-alkylaniline carbonylation process for synthesizing o-aminobenzoates and isatoic anhydrides with high yield.Our findings demonstrate an electrothermocatalytic tandem strategy for cost-effective CO2 conversion and synthesis of high valuable fine chemicals,thereby broadening the scope of its utilization. 展开更多
关键词 Tandem system CO2electroreduction Carbonylation reaction Single atom catalyst Ultrawide potential window
暂未订购 下载PDF
Reactive CO2 capture electrolysis at low voltage and high single-pass conversion enabled by ultra-low loading molecular catalyst 认领 引用
3
作者 Yuming Wu Guohao Li +7 位作者 Mengxin Liu David Inglis Yasuhiro Sakamoto Lizhuo Wang Zhiqiang Zhao Catherine Stampfl Feng Jiao Yijiao Jiang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期728-737,I0018,共10页
Integrating electrochemical CO2 conversion with carbon capture extends the CO2 source beyond pure or point-source streams.By directly interfacing with capture units,reactive CO2 capture electrolysis circumven... Integrating electrochemical CO2 conversion with carbon capture extends the CO2 source beyond pure or point-source streams.By directly interfacing with capture units,reactive CO2 capture electrolysis circumvents the energy-intensive regeneration and compression processes to supply pure CO2 stream,also minimizes the amount of unreacted CO2 through gas-fed CO2 electrolysis.However,the conversion pathway is hampered by high electrolyser voltages and reliance on precious and thick metal catalysts(>2.0 mg cm-2).Here,we report an energy-efficient reactive CO2 capture electrolysis system enabled by an ultra-low loading molecular catalyst(cobalt phthalocyanine anchored onto multi-walled carbon nanotubes,Co Pc/CNT).When the Co Pc/CNT exceeds 0.2 mg cm-2loading on cathode,the thicker Co Pc/CNT layer largely increase electrical and mass transfer resistances.This limits the availability of local CO2 at the catalyst surface,suppressing the formation of adsorbed intermediates(COOH*/CO*)on cobalt centres,as observed by operando Raman spectroscopy.Benefiting from the features,the electrolysis system achieves a single-pass CO2 conversion of 55.1%at 300 m A cm-2 and a faradaic efficiency of CO(FECO)84.7%at a 0.2 mg cm-2.At 100 m A cm-2,the synergistic combination of Co Pc/CNT with a two-layer membrane architecture reduces electrolyser voltage by 30%to widely used bipolar membrane(BPM)-incorporated electrolyser and 17%voltage to metal catalyst-based cathode.This study offers a costeffective molecular catalyst for reactive CO2 capture electrolysis and paves the way for energy-efficient carbon capture and utilisation integrated systems. 展开更多
关键词 Reactive CO2capture Bicarbonate electrolysis CO2capture and utilization Cobalt phthalocyanine Low catalyst loading High conversion yield
暂未订购 下载PDF
A triple-bed Na-FeAlOx/Zn-HZSM-5@SiO2 catalyst for the stable and direct generation of aromatics via CO2 hydrogenation 认领 引用
4
作者 Wonjoong Yoon Malayil Gopalan Sibi Jaehoon Kim 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第1期330-346,共17页
The direct synthesis of aromatic compounds from the reduction of CO2 remains challenging due to harsh operating conditions,low aromatic yields,and catalyst deactivation.A comprehensive understanding of the distance... The direct synthesis of aromatic compounds from the reduction of CO2 remains challenging due to harsh operating conditions,low aromatic yields,and catalyst deactivation.A comprehensive understanding of the distance-induced optimal activity is therefore essential for achieving a rational spatial arrangement of multifunctional active sites for the hydrogenation of CO2 to generate aromatic compounds.In this study,a triple-bed catalyst system is reported,which directly converts CO2 into aromatic compounds with low CO emission levels.At a CO2 conversion of 50.3%,the hydrocarbon pool contained 73.6%aromatic compounds while maintaining a moderately low CO selectivity of 13.9%.The BTEX(benzene,toluene,xylene,and ethylbenzene)selectivity within the aromatic products reached 67.8%and remained stable over 125 h,with only a slight decline being observed beyond this time.Compared to the mortar-and granular-mixed configurations,the triple-bed system exhibited a superior catalytic stability,likely due to the suppression of Na-induced poisoning on the zeolite acid sites.Additionally,the close contact between Fe and the zeolite structure altered the Fe phase evolution process for the chain extension reaction,while also significantly degrading the structural integrity of the zeolite.Under 370℃ and 3.5 MPa conditions,the zeolite crystallinity in the mortar-mixed 11%Na-promoted FeAlO x/Zn-HZSM-5@SiO2 catalyst dropped below 12%,whereas the double-and triple-bed configurations retained crystallinities of~65%,which likely contributed to the improved catalyst longevity.These results indicate that the triple-bed configuration provides a promising route for enhancing the stability and efficiency of the direct hydrogenation reaction to generate aromatic compounds from CO2. 展开更多
关键词 CO2hydrogenation Aromatic compounds Proximity Deactivation Triple-bed catalyst
暂未订购 下载PDF
Single-atom catalysts for CO2-to-methanol conversion:A critical review 认领 引用
5
作者 Jingying Wang Jianhui Zhao +2 位作者 Shaopo Wang Jingjie Yu Ning Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第2期274-283,共10页
Catalytic CO2-to-methanol conversion presents a synergistic approach for concurrent greenhouse gas abatement and sustainable energy carrier synthesis.Single-atom catalysts(SACs)with maximized atomic utilization,tai... Catalytic CO2-to-methanol conversion presents a synergistic approach for concurrent greenhouse gas abatement and sustainable energy carrier synthesis.Single-atom catalysts(SACs)with maximized atomic utilization,tailored electronic configurations and unique metal-support interactions,exhibit superior performance in CO2 activation and methanol synthesis.This review systematically compares reaction mechanisms and pathways across thermal,photocatalytic and electrocatalytic systems,emphasizing structure-activity relationships governed by active sites,coordination microenvironments and support functionalities.Through case studies of representative SACs,we elucidate how metal-support synergies dictate intermediate binding energetics and methanol selectivity.A critical analysis of reaction parameters(e.g.,temperature,pressure)reveals condition-dependent catalytic behaviors in thermal system,with fewer studies in photo/electrocatalytic systems identified as key knowledge gaps.While thermal catalysis achieves industrially viable methanol yields,the scalability is constrained by energy-intensive operation and catalyst sintering.Conversely,photo/electrocatalytic routes offer renewable energy integration but suffer from inefficient charge dynamics and mass transport limitations.To address the challenges,we propose strategic research priorities on precise design of active sites,synergy of multiple technological pathways,development of intelligent catalytic systems and diverse CO2 feedstock compatibility.These insights establish a framework for developing next-generation SACs,offering both theoretical foundations and technological blueprints for developing carbon-negative catalytic technologies. 展开更多
关键词 Single-atom catalysts CO2conversion Methanol Catalysis
暂未订购 下载PDF
Multidimensional coordination engineering of single-atom catalysts for boosting electrochemical CO2 reduction 认领 引用
6
作者 Zemin Feng Huangcong Tang +3 位作者 Chenghong Hu Kui Shen Liyu Chen Yingwei Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期929-935,共7页
The breaking of the symmetric electronic distribution of single-atom catalysts is effective in improving the intrinsic activity.However,traditional modification strategies can only disrupt the electronic distribution ... The breaking of the symmetric electronic distribution of single-atom catalysts is effective in improving the intrinsic activity.However,traditional modification strategies can only disrupt the electronic distribution in one dimension,resulting in limited regulation of electronic structure.Herein,we report a multidimensional coordination strategy to significantly break the symmetrical electron distribution of the metal single site to achieve highly efficient electrochemical CO2 reduction reaction(CO2 RR).Ni singleatom sites decorated with planar P and axial Cl atoms are successfully constructed on carbon support(Ni-NPCl-C).Ni-NPCl-C affords CO Faraday efficiency over 90%in a wide potential window range from-0.5 to-1.2 V and an ultrahigh turnover frequency of 1.17×105h-1,much superior to its counterparts with single-dimensional coordination.Ni-NPCl-C can be further applied as a bifunctional catalyst to construct a rechargeable Zn-CO2 battery.Spectroscopic characterizations and theoretical calculations demonstrate that the dual adjustments with axial Cl and planar P can synergistically disrupt the electron distribution in two dimensions to increase electrons around Ni sites with the upshift of the d-band center,thereby facilitating the formation of*COOH intermediates and improving the CO2 RR performance. 展开更多
关键词 Electrocatalysis CO2reduction Electronic modulation Single atom catalysts Zn-CO2battery
暂未订购 下载PDF
Highly selective catalytic hydrogenation conversion of CO2to CO over lanthanum-doped supported ruthenium catalysts 认领 引用
7
作者 Lanqing Yang Xinyi Xie +3 位作者 Shidong Bao Xiaolei Qu Shourong Zheng Heyun Fu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期136-144,共9页
The selective catalytic hydrogenation of CO2to CO via the RWGS reaction is an effective avenue for resource utilization of CO2.In this study,we prepared serial La2O3-doped Ru catalysts(i.e.,RuLa/SBA-15)usi... The selective catalytic hydrogenation of CO2to CO via the RWGS reaction is an effective avenue for resource utilization of CO2.In this study,we prepared serial La2O3-doped Ru catalysts(i.e.,RuLa/SBA-15)using a facile sequential impregnation method,and applied it for the selective hydrogenation conversion of CO2into CO.The La2O3doping remarkably promotes the dispersion of Ru nanoparticles and induces the formation of electron-deficient Ru species(Run+).In-situ DRIFTS study reveals that the hydrogenation of CO2over Ru catalysts with and without La2O3doping proceeds through different pathways.Both CO and CH4are formed on non-doped Ru/SBA-15 with formate as the key intermediate,but only CO is generated on RuLa/SBA-15 via carbonate as the intermediate because of the weakened CO adsorption on Run+.Thus,RuLa/SBA-15 exhibits outstanding CO selectivity for the hydrogenation of CO2without significant decline of activity.It achieves a CO2conversion of 51%at 600℃and nearly 100%of CO selectivity across the examined reaction temperature of 300-600℃,surpassing the performances of the non-doped counterpart(CO2conversion of 58%at 600℃and CO selectivity ranging from 2%-63%).This study provides a facile and cost-effective strategy to tune the structure of Ru catalysts for the hydrogenation conversion of CO2to obtain value-added products. 展开更多
关键词 Catalytic hydrogenation of CO2 Ru catalysts Element doping CO selectivity Carbon capture and utilization
暂未订购 下载PDF
Dynamic evolution of copper-based catalysts during CO2 electroreduction 认领 引用 被引量：3
8
作者 Zhizheng Wu Pengpeng Yang Minrui Gao 《Nano Materials Science》 EI CAS CSCD 2026年第3期687-702,共16页
The CO2 electroreduction reaction(CO2RR)is a promising approach of using renewable electricity to synthesize fuels and value-added chemicals.At present,Cu is generally considered to be the major monometallic cat... The CO2 electroreduction reaction(CO2RR)is a promising approach of using renewable electricity to synthesize fuels and value-added chemicals.At present,Cu is generally considered to be the major monometallic catalyst capable of producing multicarbon products(C2+)with high current densities from the CO2RR,but it still suffers from the low activity and high overpotential.The challenge of sluggish CO2RR kinetics can be overcome by developing efficient Cu-based catalysts,which undergo the dynamic evolution during the reaction process.The dynamic evolution of the Cu-based catalysts taking place under working conditions makes it difficult to study the structure-activity correlation and reaction mechanism present during CO2RR.Recently,a number of important works have observed and revealed the dynamic evolution process of Cu-based catalysts by operando characterization techniques.This aspect,however,remains less summarized and prospected in the CO2RR literature.In this Review,we summarize the dynamic evolution of Cu-based catalysts during the CO2RR from aspects of structure,composition and oxidation state.We highlight the correlations between evolution behaviors and catalytic properties.Then,we discuss the dynamic deactivation process of Cu-based catalysts during CO2RR,including metal impurities contamination and carbon accumulation.In particular,we introduce recent advancements in in situ characterization techniques those are employed to probe the dynamic evolution under operating conditions.We end the Review by outlining the challenges and offering personal perspectives on the future development opportunities in this field. 展开更多
关键词 Copper-based catalysts CO2electroreduction reaction Dynamic evolution
暂未订购 下载PDF
Bioinspired high-entropy metal-organic frameworks towards boosted CO2 photoconversion 认领 引用 被引量：1
9
作者 Xiaohong Li Limin Jin +3 位作者 Haihui Yu Yuteng Zhang Haifeng Zhang Yanbiao Liu 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期326-332,共7页
Sustainable photochemical CO2 conversion represents a promising strategy for mitigating excess CO2 emissions and achieving“carbon neutrality”.The development of advanced catalysts with an abundance of active s... Sustainable photochemical CO2 conversion represents a promising strategy for mitigating excess CO2 emissions and achieving“carbon neutrality”.The development of advanced catalysts with an abundance of active sites and efficient separation of photo-generated charge carriers remains a significant challenge.Here,we present a high-entropy(HE)photocatalyst by integrating five metals into Prussian blue(PB)to afford Kx(MnFeCoNiCu)[Fe(CN)6](HE-PBA)which exhibits a high concentration of active centers and rapid electron transfer,enabling superior CO2-to-CO photoreduction performance.The HE-PBA composite catalyst delivered a high CO yield(up to 1220.5μmol g-1h-1),achieving near 100%product selectivity.A mechanistic analysis has revealed strong coupling and overlapping multi-atomic orbitals,which facilitates local electron redistribution and a readjustment of electron density.This effect serves to generate abundant reactive sites with CO2 interactions that facilitate C-O bond activation.Additionally,an efficient electron transfer driven by the disparity in metal electronegativity inhibits unwanted recombination of electron-hole pairs.More significantly,the photoelectrons migrate and accumulate on the HE-PBA surface,exhibiting extended long lifetimes and robust reduction ability.The findings of this study provide important insights that can contribute to the development of high-entropy materials rich in transition metals with far-ranging potential applications. 展开更多
关键词 Photocatalytic CO2reaction High-entropy catalyst Metal-organic frameworks Charge separation
暂未订购 下载PDF
Rare earth single atom supported on C2N catalysts for electrochemical CO2reduction:A DFT study 认领 引用
10
作者 Yu Ren Qiannan Zhou +4 位作者 Xiaofei Song Yangyang Song Zean Xie Xuehua Yu Zhen Zhao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第4期1085-1090,I0004,共6页
The electrochemical CO2reduction reaction(CO2RR)can convert CO2into high value-added chemicals,which is conducive to improving climate change and energy crisis.Rare earth single-atom catalysts(SACs)have recen... The electrochemical CO2reduction reaction(CO2RR)can convert CO2into high value-added chemicals,which is conducive to improving climate change and energy crisis.Rare earth single-atom catalysts(SACs)have recently been widely studied in the field of CO2reduction due to their unique properties.Herein,a series of rare earth single-atom metals(abbreviated as RM,which are Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu)supported on C2N were designed and systematically studied for their CO2RR performance.Results show that CH4is the main product on RM@C2N and the limiting potentials are in range of-0.46 to-0.61 V except for Eu@C2N and Yb@C2N.Among them,Tb@C2N,Sm@C2N,and Gd@C2N show high activity and selectivity with limiting potentials of-0.46,-0.47,and-0.48 V.The binding energy of adsorbed oxygen atoms on rare earth SACs can be used as a good descriptor of activity from volcano plot.These results provide insights into the design of rare earth catalysts for CO2RR and valuable guidance for screening single-atom catalysts in theory. 展开更多
关键词 CO2electroreduction Single-atom catalysts Rare earths Density functional theory C2N
暂未订购 下载PDF
Chemically stable TMOx@Ti-MgO(TM=Mn and Cu)catalyst enhanced De/hydrogenation kinetics of Mg/MgH2 认领 引用
11
作者 Haotian Guan Jiang Liu +2 位作者 Qian Li Yangfan Lu Fusheng Pan 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第2期276-284,共9页
Ti-based catalysts have been identified to be efficient in enhancing hydrogenation and dehydrogenation(de/hydrogenation)kinetics of Mg/MgH2.However,their catalytic activity is constrained by the strong Ti-H bond an... Ti-based catalysts have been identified to be efficient in enhancing hydrogenation and dehydrogenation(de/hydrogenation)kinetics of Mg/MgH2.However,their catalytic activity is constrained by the strong Ti-H bond and chemical instability.Herein,we demonstrate that TMOx@Ti-MgO(TM=Mn and Cu)composite catalysts can simultaneously enhance hydrogen dissociation,diffusion and nucleation processes.MgH2 catalyzed by TMOx@Ti-MgO released 6.03-6.14 wt.%H2 within 5 min at 280℃ and 0.89-1.12 wt.%H2 within 60 min at 180℃.The partially oxidized Ti2+and Ti3+states are stabilized in MgO lattice,accelerating hydrogen adsorption,dissociation and diffusion processes.The TMOx,additionally,serve as the active center for nucleation,further improving de/hydrogenation reactions.The TMOx@Ti-MgO catalysts are characterized by high chemical stability,realizing improved cycle properties.These findings suggest a new approach to achieving controllable Catalyst-Hydrogen bond strengths and optimizing performance in de/hydrogenation reactions. 展开更多
关键词 Ti-based catalyst Mg/MgH2 hydrogen storage hydrogen diffusion nucleation
暂未订购 下载PDF
One-pot synthesis of mesoporous NiCe/Al2O3catalysts for enhanced carbon dioxide methanation performance 认领 引用
12
作者 Yanyan Feng Yongge Liu +2 位作者 Xinglian Yu Juanjuan Liu Wen Yang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第2期135-145,共11页
The hydrogenation of carbon dioxide(CO2)to methane(CH4)has become an effective strategy for reducing greenhouse gas emissions due to its high efficiencyand low cost,and ordered mesoporous materials have received... The hydrogenation of carbon dioxide(CO2)to methane(CH4)has become an effective strategy for reducing greenhouse gas emissions due to its high efficiencyand low cost,and ordered mesoporous materials have received considerable interest in CO2methanation applications because of their large specificsurface area and well-ordered pore structure.Herein,a series of the Ce-modifiedordered mesoporous catalysts(NiCe/Al2O3)were prepared through a one-pot approach,and the influenceof Ce doping on the morphology and structure of the catalysts as well as the CO2methanation performance were investigated in detail.The XRD and TEM data revealed that the introduction of Ce could effectively lower the particle size of Ni active components and advance the dispersion of Ni species.The H2-TPR profilesdemonstrated that Ce doping facilitated the catalyst's reduction by greatly decreasing its reduction temperature.In addition,the CO2-TPD and XPS data indicated that the incorporation of Ce provided sufficientbasic sites for CO2activation and adsorption,and the oxygen vacancies of the Cedoped Ni-based catalysts were significantlyenhanced.Obviously,the catalyst 30Ni10Ce/Al2O3achieved the outstanding catalytic performance,achieving CO2conversion of 90.7%and CH4 selectivity of 99.8% at 375℃,and even after 60 h of continuous reaction,it still maintained the stable catalytic activity,which suggested that the Ce-doped Ni-based catalysts can offer significantpromising applications in CO2methanation. 展开更多
关键词 CO2methanation Ni-based catalyst Mesoporous Al2O3 Ce doping Oxygen vacancy
暂未订购 下载PDF
Hydrogen-driven metal-support interaction in Ni-CeO2 catalysts boosting low-temperature CO2 methanation 认领 引用
13
作者 Ru Zhao Siyuan Xu +5 位作者 Junliang Xia Mingxue Wang Xiaoyan Han Yu Xie Qiulin Zhang Ping Ning 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第7期2097-2105,I0004,共9页
Converting CO2 to CH4 under mild conditions represents a promising strategy for carbon emission reduction and synthetic natural gas production,yet it remains challenging.In this work,we accelerated low-temperatu... Converting CO2 to CH4 under mild conditions represents a promising strategy for carbon emission reduction and synthetic natural gas production,yet it remains challenging.In this work,we accelerated low-temperature CO2 hydrogenation over Ni-CeO2 catalysts by optimizing metal-support interactions through H2-driven reconstruction.The catalyst reduced at 400℃(Ni-CeO2-400R)achieved 84.3%CO2conversion with 100%CH4 selectivity even at a low temperature of 250℃.Various in situ spectroscopic characterizations(X-ray photoelectron spectroscopy(XPS),Raman,and diffused reflectance infrared Fourier transform spectroscopy(DRIFTS))and H2/D2 isotopic exchange experiments reveal that the appropriate interaction in Ni-CeO2 motivates the dispersion of metallic Ni sites and the generation of oxygen vacancies,thereby promoting the activation of H2 and CO2 molecules,respectively.Therefore,CO2 is efficiently adsorbed and converted into reactive intermediates and finally hydrogenated to CH4through carbonyl and formate pathways simultaneously.These findings underscore the critical role of tailored metal-support interactions in designing advanced CO2 hydrogenation catalysts. 展开更多
关键词 Low-temperature CO2methanation Ni/CeO2catalysts H2treatment Metal-support interaction Rare earths
暂未订购 下载PDF
Size-Dependent Hydrogen Dissociation Capacity in Ni/CeO2 Catalysts for Low-Temperature CO2 Methanation 认领 引用
14
作者 Yu Xie Zhiyu Li +6 位作者 Xiaoyan Han Mingxue Wang Ru Zhao Siyuan Xu Qiulin Zhang Ping Ning Jiming Hao 《Rare Metals》 SCIE EI CAS CSCD 2026年第2期718-732,共15页
Converting CO2to CH4 under mild conditions is a promising strategy for solving environmental and energy problems,but also a challenge.In this work,the low-temperature CO2 hydrogenation process over Ni/CeO2 ca... Converting CO2to CH4 under mild conditions is a promising strategy for solving environmental and energy problems,but also a challenge.In this work,the low-temperature CO2 hydrogenation process over Ni/CeO2 catalysts was significantly accelerated by optimizing the H2 dissociation ability of Ni through the size effect,thus A-Ni/CeO2 with an average size of 4.9 nm achieved 83.4%CO2conversion with~100%CH4 selectivity even at 225℃.Systematic H2/D2 isotopic exchange experiments,in situ spectroscopic characterizations,and density functional theory(DFT)calculations reveal that the enhanced H2 activation ability not only promoted the creation of oxygen vacancies and hydroxyl group favorable for CO2 adsorption/activation in the pre-reduction process,but also the simultaneous hydrogenation of reactive intermediates belonging to carbonyl and formate pathway into CH4 in the reaction process.This fundamental understanding of the H2 dissociation effect on CO2 activation and hydrogenation provides critical insights for designing catalysts with considerable low-temperature activity,which significantly reduces energy consumption and operating costs for industrial CO2 conversion. 展开更多
关键词 CO2activation H2dissociation low-temperature CO2methanation Ni/CeO2catalysts size effect
暂未订购 下载PDF
Anion-regulated reconstruction of bismuth-based electrocatalysts for enhanced electrocatalytic CO2 reduction 认领 引用
15
作者 Lili Wang Bangwei Deng +5 位作者 Hongtao Xie Xianlong Lu Pengcheng Xiang Xueyang Zhao Yizhao Li Fan Dong 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第2期598-609,I0014,共12页
Elucidating the active site formation mechanism of bismuth(Bi)-based catalysts in electrochemical CO2reduction remains challenging for achieving high activity,selectivity,and long-term stability.Here we confirm thr... Elucidating the active site formation mechanism of bismuth(Bi)-based catalysts in electrochemical CO2reduction remains challenging for achieving high activity,selectivity,and long-term stability.Here we confirm through experimental results that Bi-based catalysts containing halogen ions(I-,Cl-,Br-)and SO42-maintain the system stability,keeping Faraday efficiency of formic acid above90%in the current range of 50-800 mA cm-2.In contrast,anions containing S2-and NO3-in the electrolyte can be reduced to produce by-products.These anions and their by-products could poison the active center,leading to increased side reactions and thus significantly reducing the Faraday efficiency of formic acid.The combination of non-in situ and in situ characterization results revealed that the Bi-based catalysts all underwent the transition from the initial state to the Bi/Bi2O2CO3(BOC)intermediate state in high-concentration KHCO3 solution,and the different anions could selectively modulate the degree of exposure of specific crystalline surfaces of BOC.At the late stage of the reaction,BOC was completely converted to metal Bi and became the real active center.Combined with in situ IR and DFT calculations,it is further verified that*OCHO is the key intermediate on the metallic Bi surface,which is most favorable for formic acid formation.This study reveals the key mechanism by which anions affect the formation of active sites via modulating the catalyst reconstruction process,which provides an important theoretical basis for the design and optimization of test conditions of Bi-based catalysts. 展开更多
关键词 Bismuth-based catalysts Surface reconstruction Electrocatalytic CO2reduction Anion effects In situ spectroscopy
暂未订购 下载PDF
Cu-Based Catalysts Design Toward Electrochemical CO2 Reduction to Valuable Multi-Carbons Products 认领 引用
16
作者 Li‑Qing Li Min‑Xiao Huang +3 位作者 Hong Ke Wei‑Wei Zhu Jing‑Hua Zhao Li‑Hua Zhu 《Rare Metals》 SCIE EI CAS CSCD 2026年第4期284-303,共20页
Electrochemical reduction of CO2 to multi-carbon products(e.g.,C2+ ,ethene,ethanol,etc.)not only effectively decreases the CO2 concentration in atmosphere but also shows great potential economic benefits due ... Electrochemical reduction of CO2 to multi-carbon products(e.g.,C2+ ,ethene,ethanol,etc.)not only effectively decreases the CO2 concentration in atmosphere but also shows great potential economic benefits due to these exploitable value-added products.The Cu-based catalysts have caught much attention in CO2 electroreduction due to the good selectivity to hydrocarbons products.However,designing appropriate Cu-based catalysts is desirable to further improve the energy efficiency and selectivity of specific C2+ product.In this review,primary pathways of CO2 electroreduction to C2+ products are first discussed to summarize the key elementary steps of C2+ products formation.Subsequently,various strategies of catalytic activity regulation of Cu-based catalysts are classified into geometric and electronic structures modification based on the inner correlation between these strategies and the mechanism of C2+ products formation.The review ends with a cross-scale perspective that links the selectivity enhancement of a specific C2+ product and the target design of Cu-based catalysts. 展开更多
关键词 catalytic activity regulation Cu‑based catalysts electrochemical CO2reduction
暂未订购 下载PDF
Direct synthesis of long-chain primary alcohols from syngas over Na-driven Co2C-Co catalyst 认领 引用
17
作者 Zheng Li Ziang Zhao +7 位作者 Yihui Li Yuan Lyu Li Yan Wenhao Cui Shunbin Zhu Yu Meng Hejun Zhu Yunjie Ding 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第6期371-383,共13页
The direct synthesis of high-value-added long-chain primary alcohols(LPAs,C6+OH)from syngas(CO+H2)is highly attractive.However,low selectivity of targeted products is generally obtained due to competitive dissoc... The direct synthesis of high-value-added long-chain primary alcohols(LPAs,C6+OH)from syngas(CO+H2)is highly attractive.However,low selectivity of targeted products is generally obtained due to competitive dissociative and non-dissociative CO adsorption,as well as uncontrollable chain growth that causes a complex reaction network.Herein,we report that Na-driven Co2C-Co dual active sites could be engineered by loading the Na promoter onto an activated carbon supported Co-based catalyst,achieving total alcohol selectivity of ca.46%with a remarkable LPAs fraction higher than 65%,which represents the first report of high LPA selectivity in literature.Comprehensive characterizations and experiments indicated that electron-rich state of Co2C-Co sites was generated through Na promotion,which enhances the surface basicity of the catalyst and favors chain propagation.Moreover,Na promotes the dissociation of CO to form*C species,facilitating the transformation of metallic Co into Co2C and leading to the formation of Na-driven Co2C-Co active sites that are closely associated with CO insertion.Density functional theory calculations show that Na significantly also promotes C-C coupling while inhibiting hydrogenation and promoting CO insertion,which is deemed to be the intrinsic mechanism behind the high LPAs selectivity.This work elucidates a dual role of Na in constructing active sites and modulating surface reaction energetics,providing a design paradigm to break the LPAs selectivity barrier in syngas conversion. 展开更多
关键词 Syngas conversion Alkali metal Na-driven Co2C-Co catalyst Long-chain primary alcohols Structure-performance relationship
暂未订购 下载PDF
Core-shell Pd@CeO2/γ-Al2O3 catalysts:Boosting efficiency and durability in stoichiometric natural gas vehicle exhaust treatment 认领 引用
18
作者 Run Pan Abubakar Yusuf +10 位作者 Chengjun Wang Jianrong Li Zhiyu Xiao Shuai Liu Yidong Zhong Yong Ren Zheng Wang Hainam Do John L.Zhou George Zheng Chen Jun He 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第3期348-362,共15页
Natural gas vehicles(NGVs)offer significant environmental advantages by reducing pollutant emissions,but effective exhaust treatment remains a challenge due to high methane emissions and catalyst deactivation over tim... Natural gas vehicles(NGVs)offer significant environmental advantages by reducing pollutant emissions,but effective exhaust treatment remains a challenge due to high methane emissions and catalyst deactivation over time.This study introduces a core-shell Pd@CeO2/Al2O3 three-way catalyst(TWC)designed to enhance the efficiency and durability of NGV exhaust treatment.The core-shell structure significantly improves catalytic performance.The optimized Pd@Ce/Al(S-500)catalyst demonstrates excellent low-temperature activity,with T50 values of 336℃ for CH4 and 397℃ for NO.It also achieves remarkable reductions of 113 and 177℃ in the T90 for CH4 and NO conversion,respectively,compared to the non-core-shell counterpart,Pd-Ce/Al(S-500).Characterizations reveal enhanced metal-support interactions,increased oxygen vacancies,and optimized Pd-CeO2 interfaces as key active sites.Density functional theory calculations further demonstrate that the core-shell structure facilitates electron transfer at Pd-CeO2 interfaces and lowers energy barriers for three-way reactions,enhancing catalytic efficiency.Notably,the core-shell Pd@Ce/Al(S-500)catalyst maintains high conversion efficiency for CH4 and NO,with only slight losses(5.5% and 6.6%,respectively)over a 100-h time-on-stream stability test,following 16 h of harsh hydrothermal aging at 800℃,showcasing its long-term stability.These findings provide a deeper understanding of the role of the core-shell Pd@CeO2 structure in Pd-based TWCs and offer valuable insights for designing durable and efficient catalysts to meet the stringent emission standards of NGVs. 展开更多
关键词 Core-shell catalyst Pd@CeO2/Al2O3 Natural gas vehicles Stoichiometric combustion Three-way catalysis Hydrothermal stability
暂未订购 下载PDF
Preparation and electrochemical performance of nitrogen-doped carbon-coated CuxS nanobox catalyst for hybrid Na-CO2 batteries 认领 引用
19
作者 Jing ZHAN Zi-zhuo HUA +1 位作者 Fei-xiang WU Qi-hou LI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第3期929-942,共14页
To promote CO2redox kinetics on the cathode of hybrid sodium-carbon dioxide(Na-CO2)batteries,hollow cubic CuS nanoboxes were encapsulated in polypyrrole and polydopamine by in situ polymerization of pyrrole and ... To promote CO2redox kinetics on the cathode of hybrid sodium-carbon dioxide(Na-CO2)batteries,hollow cubic CuS nanoboxes were encapsulated in polypyrrole and polydopamine by in situ polymerization of pyrrole and dopamine monomers,respectively,and coupled with high-temperature heat treatment to obtain nitrogen-carbon encapsulated CuxS@NCPPyand CuxS@NCPDA catalysts.The results show that the encapsulation of nitrogen-doped carbon not only increases the specific surface area and improves the electron affinity but also promotes the synergistic interaction between the CuS-based active species and the defect carbon,thus providing abundant active sites for CO2conversion.The electrochemical performances of the carbon-coated modified samples were all improved,especially the hybrid Na-CO2battery based on CuxS@NCPPy,which showed a low voltage gap of 0.74 V at 0.1 mA/cm2and a high power density of 3.42 mW/cm2. 展开更多
关键词 CO2reutilization copper(I)sulfide catalyst nitrogen-doped carbon high power density Na-CO2batteries
暂未订购 下载PDF
Tri-functional Ru catalyst drives efficient ammonia synthesis from N2 and H2O 认领 引用
20
作者 Ying Hou Wei Hu +6 位作者 Qiao Zhao Yuchuan Tu Guang Yang Yi Cui Wei Liu Liang Yu Dehui Deng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第7期769-775,I0018,共7页
1.Indroduction In light of the global transition toward carbon neutrality,the development of mild-condition ammonia synthesis technologies has gained significant attention as a promising solution to address the inhere... 1.Indroduction In light of the global transition toward carbon neutrality,the development of mild-condition ammonia synthesis technologies has gained significant attention as a promising solution to address the inherent limitations of the traditional Haber-Bosch approach,which remains highly energy-intensive due to the extreme operation conditions(above 350℃ and over 10 MPa)required to activate the robust N≡N bond(945 kJ mol-1).Furthermore,the process is carbon-intensive,as its primary hydrogen source is derived from hydrocarbon reforming with high carbon emissions[1,2]. 展开更多
关键词 NH3 synthesis N and H2O Tri-functional Ru-based catalyst Reversible Li battery
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 250 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈