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165,060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：
Beyond ammonia-oxidizing bacteria-centric paradigms:Geobacter-assisted anodic anaerobic ammonia oxidation 认领 引用
1
作者 Decong Zheng Daping Li Jingting Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期399-408,共10页
Anodic anaerobic ammonium oxidation(anodic anammox)presents a sustainable approach for nitrogen removal,yet its bioelectrochemical mechanisms remain unclear due to biofilm complexity and undefined roles of electroacti... Anodic anaerobic ammonium oxidation(anodic anammox)presents a sustainable approach for nitrogen removal,yet its bioelectrochemical mechanisms remain unclear due to biofilm complexity and undefined roles of electroactive microorganisms(EAMs).This study reveals that nitrite(NO2-)is the direct product of ammonia-oxidizing bacteria(AOB)-driven anodic anammox,with extracellular electron transfer(EET)mediated by indirect mechanisms via redox shuttles.Metagenomic analysis identified two ammonia oxidation pathways:(1)a novel short-range nitrification pathway(NH4+→NO2-)governed by ncd2 genes,and(2)a traditional ammonia oxidation pathway(NH4+→NH2OH)facilitated by amoABC.Intriguingly,Geobacter exhibited potential NH2OH oxidation capability,bridging AOB activity and electrode respiration.Functional inhibition experiments demonstrated that EAMs-derived electron shuttles and reactive oxygen species(ROS)are critical for enhancing EET efficiency,with ROS serving as a key electron acceptor for AOB under anaerobic conditions.Spatial and metabolic synergy between EAMs and AOB—via substrate cross-feeding,cofactor provision,and electron transfer—was essential for maintaining biofilm stability.These findings challenge the conventional view of AOB-driven anodic anaerobic anammox mechanisms and provide new insights into sustainable nitrogen removal in engineered bioelectrochemical systems. 展开更多
关键词 Microbial electrolysis cell Anodic ammonia oxidation Electron transfer mechanism Electroactive microorganisms Ammonia-oxidizing bacteria
暂未订购 下载PDF
Enhanced anodic mass transfer enables interfacial Cl·for efficient ammonia oxidation 认领 引用
2
作者 Xia Chen Ting Dai +4 位作者 Meng-Ying Yin Xing-Yuan Xia Qiu-Ju Xing Lei Tian Jian-Ping Zou 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期365-370,共6页
The electrostatic repulsion between the anode and ammonia(NH4+)can cause chlorine radicals(Cl·)at the interface to self-compounding into low oxidating species,weakening the treatment performance of ammon... The electrostatic repulsion between the anode and ammonia(NH4+)can cause chlorine radicals(Cl·)at the interface to self-compounding into low oxidating species,weakening the treatment performance of ammonia-nitrogen(NH4+-N)wastewater.This study introduces electron-rich elements into the tetrahedral sites(ATd2+)of spinel cobalt oxide(Co3O4)for efficient and selective NH4+-N mineralization induced by interfacial Cl·.Batch experiments,in-situ characterizations,and theoretical calculations confirm that CuTa2+have moderate energy level matching and strong binding energy with NH4+compared to NiTd2+and ZnTd2+.NH4+can effectively overcome electrostatic repulsion and enrich on CuxCo3-xO4anode.More importantly,the interaction of CuTd2+-O-CoOh3+weakens the binding of Cl·at CoOh3+sites,promoting the desorption of Cl·from the anodic interface.As a result,NH4+-N is mineralized by Cl·into N2with a rate of 4.4×10-2min-1,superior to Co3O4and commercial dimensionally stable anodes,Finally,the scale-up experiment using a continuous flow reactor realizes long-term stability for NH4+-N wastewater treatment,in which 100%of NH4+-N and 88.3%of total nitrogen can be continuously eliminated in 96 h.This study offers an in-depth understanding of interfacial reactions in the EC system and guides the design and synthesis of superior anodes for environmental remediation. 展开更多
关键词 Electrocatalytic system Ammonia-nitrogen oxidation Chlorine radical Mass transfer Mineralization
暂未订购 下载PDF
Effect of Substrate Micro-arc Oxidation Pretreatment on Microstructure and High-Temperature Oxidation Resistance of Si-Cr-Ti-Zr Coating on Ta12W Alloy 认领 引用 被引量：1
3
作者 Yang Fan Chang Jianxiu +2 位作者 Wang Xin Li Hongzhan Yan Peng 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第1期92-104,共13页
To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretre... To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretreatment was employed to construct a Ta2O5ceramic layer on the Ta12W alloy surface.Subsequently,a slurry spraying-vacuum sintering method was used to prepare a Si-Cr-Ti-Zr coating on the pretreated substrate.Comparative studies were conducted on the microstructure,phase composition,and isothermal oxidation resistance(at 1600℃)of the as-prepared coatings with and without the micro-arc oxidation ceramic layer.The results show that the Ta2O5layer prepared at 400 V is more continuous and has smaller pores than that prepared at 350 V.After microarc oxidation pretreatment,the Si-Cr-Ti-Zr coating on Ta12W alloy consists of three distinct layers:an upper layer dominated by Ti5Si3,Ta5Si3,and ZrSi;a middle layer dominated by TaSi2;a coating/substrate interfacial reaction layer dominated by Ta5Si3.Both the Si-Cr-Ti-Zr coatings with and without the Ta2O5ceramic layer do not fail after isothermal oxidation at 1600℃for 5 h.Notably,the addition of the Ta2O5 ceramic layer reduces the high-temperature oxidation rate of the coating. 展开更多
关键词 tantalum-tungsten alloy silicide coating micro-arc oxidation reaction formation mechanism high-temperature oxidation
暂未订购 下载PDF
Spin-state engineering of octahedral Co via tetrahedral Ni in NiCo2O4for electrocatalytic glucose oxidation to formate 认领 引用 被引量：1
4
作者 Zihao Wang Xiran Wang +10 位作者 Baoqi Jia Yilin Zuo Lin Zhou Zining Yan Zanyang Zhu Yonghao Xiao Yunfei Zhang Yufan Yang Xin Chen Lizhen Liu Xin Zhao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第1期605-617,I0013,共13页
Electrocatalytic glucose oxidation to high-value chemicals provides a sustainable route for biomass valorization.NiCo-based catalysts have emerged as promising candidates for glucose oxidation reaction owing to the in... Electrocatalytic glucose oxidation to high-value chemicals provides a sustainable route for biomass valorization.NiCo-based catalysts have emerged as promising candidates for glucose oxidation reaction owing to the intrinsic activity of Ni and Co catalytic centers.However,the dynamic evolution and atomic-scale synergy between these centers remain elusive.Herein,we fabricated NiCo2O4nanosheets supported on nickel foam,where Ni preferentially occupies tetrahedral sites to regulate the electronic configuration of octahedral Co.Experimental and theoretical results demonstrate that the incorporation of tetrahedral Ni induces low-to-intermediate spin transition in octahedral Co,thereby optimizing eg orbital occupancy and stabilizing active sites.This spin-state engineering establishes Ni-Co synergistic catalytic centers for the selective oxidation of glucose to formate(FA).At higher potential(≥1.4 V vs.RHE),octahedral Co undergoes reconstruction into excessive active CoOOH and CoO2species,resulting in glucose overoxidation to CO2and intensified competitive oxygen evolution.In contrast,at lower potentials(<1.4 V vs.RHE),tetrahedral Ni facilitates electron delocalization across the Ni–O–Co lattice,thereby stabilizing octahedral Co for glucose adsorption and oxidation.Subsequently,a coupled electrocatalytic system was constructed,achieving 80.7%FA yield with 91.3%Faradaic efficiency(FE)at NiCo2O4anode and H2 evolution rate of 696μmol h−1with 99.9%FE at Pt cathode for 2 h under 1.35 V vs.RHE.This work provides a deep insight into spin-state regulation of the catalytic center,offering valuable guidance for rational catalyst design. 展开更多
关键词 Electrocatalysis Glucose oxidation Biomass valorization Spin-state regulation Formate
暂未订购 下载PDF
Influence mechanism of pore structure evolution on oxygen consumption dynamics during low-temperature oxidation of igneous metamorphic coal 认领 引用 被引量：1
5
作者 Xu Shao Botao Qin +5 位作者 Quanlin Shi Ziwei Li Bao Qu Shibo Xu Junyu Wang Mingyue Weng 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2026年第3期553-572,共20页
In igneous-intruded coal seams,coal undergoes significant metamorphism,which critically alters its pore structure and oxygen consumption dynamics,thereby elevating its spontaneous combustion tendency.This study invest... In igneous-intruded coal seams,coal undergoes significant metamorphism,which critically alters its pore structure and oxygen consumption dynamics,thereby elevating its spontaneous combustion tendency.This study investigates the specific surface area,pore volume,structure complexity/connectivity,heterogeneity/local features of pore size distribution,and oxygen consumption dynamics of igneous metamorphic coal through N2/CO2 isothermal adsorption tests and low-temperature oxidation experiments,and elucidates the influence mechanisms of pore structure evolution on oxygen consumption dynamics during low-temperature oxidation.With increasing metamorphic degree,igneous metamorphic coal exhibits a more pronounced reduction in specific surface area during oxidation,while the increase in structure complexity due to coal-oxygen reactions is suppressed.Thermally metamorphic coal demonstrates accelerated oxygen consumption,with oxidation amplifying the difference in reaction rates compared to raw coal.Key mechanisms include oxidation-induced reduction in mesopore complexity and micropore volume,decreased dominance of small-pore-volume apertures,and increased heterogeneity,collectively leading to a lower half-oxygen-consuming temperature and steeper oxygen consumption curves.Simultaneously,increased pore volume/complexity and reduced uniformity/connectivity act synergistically to enhance oxygen consumption capacity,highlighting the coupling between pore structure evolution and oxidation behavior in igneous metamorphic coal.This study provides theoretical insights into the pore-oxygen coupling mechanisms governing coal spontaneous combustion in igneous intrusion areas. 展开更多
关键词 Igneous metamorphic coal Thermal metamorphism Low-temperature oxidation Pore structure Oxygen consumption dynamics
暂未订购 下载PDF
Accelerated activation of ozone on Fe-doped MnO2for highly efficient ozone catalytic oxidation of ethyl acetate 认领 引用 被引量：1
6
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
暂未订购 下载PDF
Low-cost synthesis of large graphene oxide flakes by the total oxidation of large natural graphite flakes 认领 引用
7
作者 Zhang Yuanyuan Mai Jianbin +9 位作者 Chen Wei Zhang Wenlong Liu Jing Liao Huaping An Junwei Wang Jionghui Huang Dongmei Lv Wei Du Hongda Kang Feiyu 《新型炭材料（中英文）》 SCIE EI CSCD 北大核心 2026年第2期336-348,I0001-I0008,共13页
Large graphene oxide(LGO)sheets have significant advantages over smaller ones in various applications.However,producing them by the Hummers-type oxidation of large natural graphite flakes is challenging.The inherent l... Large graphene oxide(LGO)sheets have significant advantages over smaller ones in various applications.However,producing them by the Hummers-type oxidation of large natural graphite flakes is challenging.The inherent limiting factors are generally believed to be that large graphite flakes are both difficult to oxidize fully and prone to fragmentation during the process.By in-situ monitoring the graphite oxidation,we observed that,given sufficient time,large graphite flakes may be fully oxidized while still remaining largely intact.Graphite oxidation is governed by diffusion of the oxidizer between the layers,and is described by Fick’s law,where a high oxidizer concentration gradient increases the diffusion rate.We therefore increased the oxidizer concentration by minimizing the amount of solvent(concentrated H2SO4),achieving full oxidation of gram-scale large graphite flakes in a semi-solid state with significantly reduced reagent consumption.In addition,the reaction temperature was adjusted to balance graphite oxidation and Mn(VII)self-decomposition.Using this approach,gram-scale 200-,100-,and 50-mesh natural graphite were all fully oxidized with a significantly reduced consumption of both H2SO4 and KMnO4.A reduction in size occurs during exfoliation,yielding LGO with average sizes of 27.3,58.7,116.2μm,respectively.This study not only provides a scalable and cost-effective strategy for LGO production but also advances the understanding of Hummers-type methods. 展开更多
关键词 Large graphene oxide In-situ monitoring Oxidation Oxidizer concentration
暂未订购 下载PDF
Effects of photochemical and aqueous-phase oxidation on secondary formation during the 31st FISU Summer World University Games,2023 认领 引用
8
作者 Xiaoling Zeng Zhier Bao +14 位作者 Jiawei Zhou Guangming Shi Li Zhou Shumin Zhang Xin Qi Keding Lu Chongzhi Zhai Zhenliang Li Xin Li Chao Peng Fumo Yang Mingjin Tang Miao Feng Qinwen Tan Yang Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第4期810-820,共11页
Secondary inorganic and organic aerosols(SIA and SOA)constitute the predominant components of fine particles(PM2.5).In this study,we investigated the effects of photochemical and aqueous-phase oxidation on secondar... Secondary inorganic and organic aerosols(SIA and SOA)constitute the predominant components of fine particles(PM2.5).In this study,we investigated the effects of photochemical and aqueous-phase oxidation on secondary aerosol formation in Sichuan,China,during the SummerWorld University Games,2023.A Time-of-Flight Aerosol Chemical Speciation Monitor(ToF-ACSM)was employed for PM2.5component analysis,while the multiple linear engine(ME-2)facilitated the source apportionment of organic aerosols(OA).The average PM2.5was 13.6μg/m3,in which secondary aerosols accounted for 85.3%over the whole observation.Nitrate formation relied on both photochemical and aqueous-phase oxidation,whereas sulfate was mainly formed through photochemical oxidation.Photochemical processes significantly promoted the SOA formation,especially less oxidized oxygenated OA(LO–OOA).However,as relative humidity(RH)increased,the proportion of more oxidized oxygenated OA(MO–OOA)in SOA increased,and O/CSOArose.This indicated that photochemical oxidation primarily drove SOA formation,while aqueous-phase oxidation significantly enhanced the oxidation degree of SOA.The formation mechanism of SOA remained consistent across before,during and after the control periods,but emission control measures significantly slowed the rise in SOA levels during the control period when compared to before the control period.This study is helpful in understanding the role of photochemical and aqueous-phase oxidations on secondary aerosol formation under high Oxconditions,as well as the impact of emission control on SOA composition and evolution. 展开更多
关键词 Source apportionment Emission control Photochemical oxidation Aqueous-phase oxidation
暂未订购 下载PDF
Oxidation Performance of NiCoCrAlYTa+7YSZ Coatings With Ta Addition at Different Temperatures 认领 引用
9
作者 Cheng Xu Junhao Hu +6 位作者 Xunlei Chen Ruixiong Zhai Shaoyi Cheng Yan Yang Xintao Zhang Chao Li Jing Feng 《Rare Metals》 SCIE EI CAS CSCD 2026年第1期439-452,共14页
This study investigates the morphology and oxidation behavior of thermally grown oxides(TGO) formed at the interface of NiCoCrAlYTa+7YSZ(7 wt% Y2O3-stabilized zirconia) coatings deposited by air plasma spray(APS... This study investigates the morphology and oxidation behavior of thermally grown oxides(TGO) formed at the interface of NiCoCrAlYTa+7YSZ(7 wt% Y2O3-stabilized zirconia) coatings deposited by air plasma spray(APS) in air environments at1050℃,1100℃,and 1150℃.The enrichment of Ta-rich oxides beneath the TGO,along with the segregation of Y and Ta at Al2O3 grain boundaries,effectively inhibited the outward diffusion of Al.During cyclic oxidation,the outward diffusion of Al is influenced by the content of Y and Ta elements.Dense fine-striped Al2O3 formed within the BC during the APS process,acting as a diffusion barrier to inhibit the outward diffusion of Al.The internal growth oxides generated during cyclic oxidation significantly reduced the coefficient of thermal expansion(CTE) of the bond coat(BC),thereby reducing the driving force for top coat(TC) spallation and extending the service life of thermal barrier coatings(TBCs). 展开更多
关键词 air plasma spray bond coat high-temperature oxidation internal growth oxide segregation TEM
暂未订购 下载PDF
Rational Design of a Perovskite-Type Catalyst for Toluene Oxidation Via Simultaneous Phosphorus Doping and Post-Synthesis Acidic Etching 认领 引用
10
作者 Li Yang Kehan Yin +4 位作者 Chuang Shi Guidong Mu Shi Liu Yanzhi Li Zongping Shao 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第1期311-320,共10页
Perovskite oxides are highly promising catalysts for the combustion removal of volatile organic compounds(VOCs)due to their excellent stability,structural flexibility,and compositional versatility.This study presents ... Perovskite oxides are highly promising catalysts for the combustion removal of volatile organic compounds(VOCs)due to their excellent stability,structural flexibility,and compositional versatility.This study presents a novel perovskite oxide that exhibits enhanced catalytic activity and superior durability for toluene combustion at reduced temperatures.This improvement is achieved by phosphorus doping at the B-site of LaCoO3-δ(LC)perovskite oxide,followed by post-synthesis acid etching for a proper time.The resulting catalyst demonstrates increased specific surface area,higher total pore volume,and enhanced oxygen vacancy concentration both in the bulk and on the surface.Additionally,the activity of surface lattice oxygen species is significantly improved,leading to enhanced catalytic performance in toluene combustion.Notably,the optimized catalyst shows an exceptionally low activation energy(Ea)of 49.3 kJ mol-1,with a T90 reduction of over 214℃compared to the phosphorus doped LC and 190℃compared to pristine LC.Phosphorus doping plays a main role in significantly improving the long-term durability,particularly in the presence of CO2and H2O,while acid etching boosts the catalytic activity.This work introduces a rational and innovative strategy for optimizing VOC oxidation by improving the structure and surface chemical states of perovskite catalysts. 展开更多
关键词 acidic etching oxygen species perovskite oxides phosphorus doping toluene oxidation
暂未订购 下载PDF
Influence of interfacial segregation of Sn microalloying on internal oxidation of Fe-Mn-Si based alloys 认领 引用
11
作者 Wen-Tao Zhang Yi-Ming Liu +4 位作者 Qin Luo Wei-Chen Mao Ju-Feng Hong Xin-Yan Jin Guang-Xin Wu 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第3期31-44,共14页
Severe internal oxidation formed in advanced high-strength steels(AHSSs)during the hot-rolled coiling process compromises subsequent cold rolling and galvanizing processes.Herein,we report how Sn microalloying governs... Severe internal oxidation formed in advanced high-strength steels(AHSSs)during the hot-rolled coiling process compromises subsequent cold rolling and galvanizing processes.Herein,we report how Sn microalloying governs internal oxidation behavior and modulates iron oxide phase transition process.Sn addition significantly reduces the depth of grain boundaries oxidation and the area of internal oxidation,as well as retards the process of oxide scale transformation.Sn preferentially segregates at the iron oxide/substrate interface,forming a diffusion barrier that suppresses outward diffusion of alloying elements and inward oxygen transport.Concurrently,Sn enrichment at grain boundaries obstructs short-circuit oxygen diffusion pathways,significantly reducing the depth of oxidation at the grain boundaries.Furthermore,Sn segregation decreases the interfacial oxygen chemical potential and oxygen availability for selective oxidation reaction.The strategic incorporation of surface-active elements has emerged as a viable metallurgical approach to reduce internal oxidation in hot-rolled coils for AHSS applications. 展开更多
关键词 Sn microalloying Interface segregation Oxidation kinetics Grain boundaries oxidation Hot-rolled coil
暂未订购 下载PDF
Advances in metal oxide catalysts for efficient VOCs oxidation:Synthesis strategy and catalytic mechanism 认领 引用
12
作者 Fan Dang Chunli Ai +5 位作者 Chi Ma Zeyu Jiang Jicheng Liu Mingjiao Tian Mingzhuo Zhang Chi He 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第2期97-123,共27页
The severe hazard of volatile organic compounds(VOCs)makes their decomposition technology a key topic research.Catalytic oxidation is an efficient and environmentally friendly strategy for removing VOCs.The metal oxid... The severe hazard of volatile organic compounds(VOCs)makes their decomposition technology a key topic research.Catalytic oxidation is an efficient and environmentally friendly strategy for removing VOCs.The metal oxide catalysts dominate VOCs oxidation reactions,owing to their cost-effectiveness,robust redox properties,tunable crystal structures,and excellent operational stability.Thus,designing high-performance metal oxide catalysts is important.This review systematically summarized the recent advances in constructing highly efficient active metal oxides,with emphasis on representative preparation method,the structure performance relationship,and the reaction mechanism of different types VOCs.Finally,the remaining challenges for creating metal oxide catalysts in practical applications are discussed. 展开更多
关键词 Metal oxide catalysts Volatile organic compounds oxidation Synthesis strategy Structure modulation Reaction mechanism
暂未订购 下载PDF
Research progress on catalyst design and reaction mechanisms for heterogeneous oxygen oxidation of light hydrocarbons 认领 引用
13
作者 ZENG Zhuang LI Bin +1 位作者 XIA Changjiu ZHANG Xiaoxin 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第5期87-106,共20页
Catalytic oxidation represents a pivotal technology for the valorization of light hydrocarbons,where oxidative dehydrogenation(ODH)and epoxidation reactions using molecular oxygen have garnered substantial interest ow... Catalytic oxidation represents a pivotal technology for the valorization of light hydrocarbons,where oxidative dehydrogenation(ODH)and epoxidation reactions using molecular oxygen have garnered substantial interest owing to their high atom economy and environmental friendliness.This review systematically summarizes recent advances in the oxidative dehydrogenation of light alkanes(ethane,propane)and the aerobic epoxidation of light olefins(ethylene,propylene).In terms of rational catalyst design,this review elaborates on performance regulation strategies for metal oxide catalysts such as MoVNbTeOxmixed oxides,NiO-based,and V-based systems,as well as carbon/boron-based non-metal catalysts in alkane oxidative dehydrogenation,along with silver-based and copper-based catalysts in alkene epoxidation.These strategies include regulating the oxidation state of active sites,strong metal-support interactions,particle size and crystal facet engineering,and promoter modification.At the mechanistic level,combining density functional theory calculations with in situ characterization techniques,this review delves into the C-H bond activation and alkene desorption pathways in oxidative dehydrogenation,along with the oxygen insertion routes and competing side reactions in epoxidation.Special attention is given to the dynamic evolution of electrophilic and nucleophilic oxygen species and their decisive role in reaction selectivity.Finally,the review outlines persistent challenges in the field,including suppressing over-oxidation and overcoming the trade-off between conversion and selectivity and proposes future research directions such as the precise design of active centers,development of inherently safer processes,and in-depth analysis of complex reaction networks,aiming to support the green transition of the chemical industry. 展开更多
关键词 heterogeneous aerobic oxidation oxidative dehydrogenation aerobic epoxidation rational catalyst design reaction mechanism
暂未订购 下载PDF
Fabrication-Driven Oxidation Pathways in Y/Hf-Modified High-Entropy Alloys:From Elemental Segregation to Oxide Homogeneity 认领 引用
14
作者 Huaqing Yi Jiapeng Zheng +3 位作者 Jiawen Zhang Yi Yang Binbin He Wenjun Lu 《Rare Metals》 SCIE EI CAS CSCD 2026年第2期431-445,共15页
This study elucidates the oxidation mechanisms governing Y/Hf-doped AlCoCrFeNiTi high-entropy alloys(HEAs)and reveals the pivotal role of fabrication processes in dictating high-temperature oxidation behavior.We demon... This study elucidates the oxidation mechanisms governing Y/Hf-doped AlCoCrFeNiTi high-entropy alloys(HEAs)and reveals the pivotal role of fabrication processes in dictating high-temperature oxidation behavior.We demonstrate that casting and spark plasma sintering(SPS)promote Y/Hf segregation,resulting in heterogeneous oxide formation and compromised scale stability,whereas filtered cathodic vacuum arc(FCVA)deposition yields grain-boundary-free coatings with amorphous microstructures that foster the development of continuous dense Al2O3 films.Compared to conventional MCrAlY coatings,the FCVA-fabricated HEAs exhibit a tenfold reduction in oxidation rate.Notably,Al depletion during oxidation induces a B2→FCC phase transition,accelerating Fe/Co/Ni/Cr outward diffusion and facilitating spinel formation.Although Y/Hf co-doping effectively suppresses Al diffusion via the formation of large ionic clusters,the synergy is limited by atomic size mismatch.Our findings underscore that oxidation resistance is governed not merely by reactive element content but critically by their spatial distribution and the continuity of the protective oxide layer,offering a process-informed pathway to optimize high-temperature performance of HEA-based bond coats. 展开更多
关键词 fabrication process effects high-entropy alloys oxidation mechanisms protective oxide layer Y/Hf Co-doping
暂未订购 下载PDF
High-valent cobalt-oxo species mediated selective oxidation of glucose to chemicals in photocatalytic Fenton-like system 认领 引用
15
作者 Tianliang Xia Chengxu Wang +12 位作者 Xinyu Bai Meiting Ju Hengli Qian Ruite Lai Chao Xie Guanjie Yu Yao Tang Fei Qu Chaojie Zhang Shuwen Zhou Haijiao Xie Shaolan Song Qidong Hou 《Green Energy & Environment》 SCIE EI CAS CSCD 2026年第2期478-487,共10页
Peroxymonosulfate(PMS)-based Fenton-like technologies have been increasingly employed in the upgrading of biomass,but they are commonly limited by the trade-off between conversion and selectivity due to the short life... Peroxymonosulfate(PMS)-based Fenton-like technologies have been increasingly employed in the upgrading of biomass,but they are commonly limited by the trade-off between conversion and selectivity due to the short lifetime of reactive oxygen species(ROS)and uncontrollable oxidation pathways.Herein,we show that single-atom Co supported on carbon nitride enables the high-valent-oxo cobalt species(Co(IV)O)mediated oxidation of glucose into value-added products in acetonitrile.This photocatalytic Fenton-like system achieved an overall selectivity of gluconic acid,glucaric acid,arabinose,and formic acid up to 90.3%at glucose conversion of 69.6%,outperforming most of previously reported catalytic systems.The small amount(0.72 wt%)of single-atom Co could not only elevate the optical absorption and the efficiency of photo-generated carriers separation but also induce the efficient generation of Co(IV)O with reduced ROS to enable efficient and selective oxidation.These findings prove the great promise of high-valent metal-oxo species in biomass conversions. 展开更多
关键词 Biomass Fenton-like process Glucose Oxidation High-valent cobalt
暂未订购 下载PDF
Hierarchical oxidation and asymmetric corrosion mechanism of pyrrhotite 认领 引用
16
作者 Yuanlin Ma Feng Xie +4 位作者 Changtao Wang Sheng Jian Xian Xie Xiong Tong Chuandong Zhao 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2026年第5期1101-1119,共19页
Pyrrhotite,a gangue mineral involved in the separation of polymetallic sulfide ore,is prone to oxidation,which deteriorates the pulp environment and reduces flotation efficiency.In this study,the oxidation-corrosion c... Pyrrhotite,a gangue mineral involved in the separation of polymetallic sulfide ore,is prone to oxidation,which deteriorates the pulp environment and reduces flotation efficiency.In this study,the oxidation-corrosion characteristics of pyrrhotite were systematically investigated,revealing the influence of pulp oxygenation and pH on surface oxidation-corrosion,as well as the mechanism.Dissolved oxygen measurements and inductively coupled plasma emission spectroscopy demonstrated that elevated pulp pH enhances the oxidation kinetics and extent.Under acidic conditions,pulp aeration intensifies Fedominated asymmetric corrosion,generating Fe-deficient/S-abundant surfaces.Conversely,pulp aeration is conducive to the selective corrosion of S under alkaline conditions,yielding Fe-abundant/S-deficient surfaces.X-ray photoelectron spectroscopy revealed that enhancing the aeration intensity or raising the pH promotes the oxidation of Fe and S sites and accelerates the hydroxylation of Fe site.Supported by the surface etching analysis,the hierarchical oxidation pathways were clarified:Fe(Ⅱ)-S→Fe(Ⅲ)-S→Fe(Ⅲ)-O,S2-→S22-→Sn2-→SO42-,and Me-O→Me-OH→H2O.Scanning electron microscopy combined with energy dispersive spectroscopy further confirmed the hierarchical oxidation and asymmetric corrosion characteristics,with corrosion becoming more pronounced as oxidation progresses.These findings elucidate the transformation of surface states and provide a theoretical foundation for understanding the reactivity of pyrrhotite during pretreatment and flotation. 展开更多
关键词 Pyrrhotite Hierarchical oxidation Asymmetric corrosion Surface etching Flotation
暂未订购 下载PDF
Sub-stoichiometric Trifluoromethanesulfonic Anhydride/Dimethyl Sulfoxide-Mediated Cooxidation of Trivalent Phosphine to Tertiary Phosphine Oxides 认领 引用
17
作者 Li Ming Wang Zhichao +3 位作者 Sh Dawei Yang Fengkun Wang Changcheng Yang Bin 《有机化学》 SCIE CAS CSCD 北大核心 2026年第3期888-897,共10页
A sub-stoichiometric trifluoromethanesulfonic anhydride/dimethyl sulfoxide-mediated cooxidation approach has been developed for the efficient oxidation of phosphines to phosphine oxides.By avoiding the use of stoichio... A sub-stoichiometric trifluoromethanesulfonic anhydride/dimethyl sulfoxide-mediated cooxidation approach has been developed for the efficient oxidation of phosphines to phosphine oxides.By avoiding the use of stoichiometric oxidants or toxic reagents,this procedure provides an economical and practical route to a variety of phosphine oxides.A broad range of P(Ⅲ)-compounds are well compatible with this transformation.The mild conditions,short reaction time,and scale-up preparation enable the potential application of this method to the late-stage industrial production. 展开更多
关键词 phosphorus chemistry sub-stoichiometric cooxidation tertiary phosphine oxides
暂未订购 下载PDF
Beyond oxygen evolution:Recent progress in hydrogen production via anodic substitution reactions 认领 引用
18
作者 Juan He Yue He +6 位作者 Xianya Liu Hainan Sun Hengyang Mao Dawei Yang Meisheng Li Shouyong Zhou Yijiang Zhao 《Materials Reports(Energy)》 EI 2026年第2期42-59,共18页
With the rise in demand for energy and the increasing depletion of fossil fuels,the development and research of new energy sources have been advancing speedily.Hydrogen energy has attracted particular attention due to... With the rise in demand for energy and the increasing depletion of fossil fuels,the development and research of new energy sources have been advancing speedily.Hydrogen energy has attracted particular attention due to its zero-pollution and zero-carbon emissions.However,the high energy demand of traditional water electrolysis remains a major challenge for its industrial application.The slow kinetics of the anodic oxygen evolution reaction(OER)are the major bottleneck the key constraint on hydrogen production.Therefore,replacing OER with a lower potential anodic oxidation reaction is an important strategy to reduce energy consumption.While review articles on anode substitution have proliferated in recent years,few offer a systematic examination integrating mechanistic insights,energy requirements,and economic viability.This review summarizes recent research progress on anodic OER replacement via the electrooxidation of biomass,small-molecule reagents,and pollutants.Furthermore,it emphasizes the recovery and reuse of high-value-added products from anodic replacement reactions.Finally,this review presents a comprehensive assessment of the strengths,weaknesses,and technoeconomic viability of different replacement strategies,along with a forward-looking perspective on the future development paths and key challenges in electrocatalytic hydrogen production. 展开更多
关键词 Oxygen evolution reaction Anodic substitution reactions Water splitting Hydrogen production
暂未订购 下载PDF
Electro-oxidation synthesis of amides from carbon-and nitrogen-containing small molecules 认领 引用
19
作者 Aijing Ma Baian Shen +2 位作者 Minghao Guo Chengying Guo Yifu Yu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第1期1-6,共6页
Electrochemical synthesis of amides from carbon-and nitrogen-containing small molecules is alluring from the view of carbon neutrality.Previous works were mainly focused on electro-reduction coupling of C-N bond to pr... Electrochemical synthesis of amides from carbon-and nitrogen-containing small molecules is alluring from the view of carbon neutrality.Previous works were mainly focused on electro-reduction coupling of C-N bond to prepare amides coupled with the useless oxygen evolution reaction on the anode.But,the competing hydrogen evolution reaction is more favorable in dynamics on the cathode,severely retarding the Faradaic efficiency of the amides.Very recently,electro-oxidation construction of C-N bond via coupling the cheap C-and N-containing small molecules to achieve high energy efficiency emerges as a rising star,while the big challenge lies in preventing the sole oxidation of feedstocks.In this perspective,we highlight the recent progress in anodic electro-oxidation synthesis of amides and the potential reaction mechanism.We also discuss the application potential and the development opportunities of the electro-oxidation strategy for amides synthesis from carbon-and nitrogen-containing small molecules. 展开更多
关键词 Amides Electrosynthesis Oxidation coupling C-N bond Sustainable feedstocks
暂未订购 下载PDF
Ferulic acid alleviates the reduction of beef myofibrillar protein digestibility mediated by protein oxidation:insight from peptide release 认领 引用
20
作者 Yantao Yin Yongcun Lu +2 位作者 Naiyong Xiao Shucheng Liua Wangang Zhang 《Food Science and Human Wellness》 SCIE CAS CSCD 2026年第3期1179-1188,共10页
This study investigated the protective effect of ferulic acid(FA) on the digestibility of oxidized beef myofibrillar protein(MP).MP were treated with varying concentrations of FA(20,40,and 80 μmol/g pro) and then exp... This study investigated the protective effect of ferulic acid(FA) on the digestibility of oxidized beef myofibrillar protein(MP).MP were treated with varying concentrations of FA(20,40,and 80 μmol/g pro) and then exposed to oxidation.The results showed that FA inhibited carbonyl in a dose-dependent manner.Fluorescence spectroscopy and molecular docking studies revealed FA was bonded to MP via hydrophobic interactions and hydrogen bonds.Sodium dodecyl sulfate polyacrylamide gel electrophoresis and transmission electron microscope analysis indicated that FA mitigated the aggregation of oxidized MP.Peptidomic analysis showed FA protected 34.24% peptides recover from oxidation loss,and theses recovered peptide were mainly distributed in hydrophobic regions and lysine sites.In vitro digestion showed FA remarkably improved digestibility of oxidized MP(P < 0.05),with 80 μmol/g pro FA mitigating 67.85% loss in digestibility.Overall,FA effectively preserved the release of peptides by inhibiting hydrophobic aggregation and oxidation of lysine residues,thereby alleviating the decrease in digestibility of oxidized MP. 展开更多
关键词 Meat Protein oxidation Protein digestibility Ferulic acid Peptidomic
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