检索结果-南通市图书馆

Nano-Micro Letters 2022年第7期14卷 86-117页

作者： Jiangtian Li U.S.Army Combat Capabilities Development Command Army Research Laboratory 2800 Powder Mill RoadAdelphiMD 20783USA

The Oxygen evolution reaction(OER)is the essential module in energy conversion and storage devices such as electrolyzer,rechargeable metal–air batteries and regenerative fuel cells.The adsorption energy scaling relations between the reaction intermediates,however,impose a large intrinsic overpotential and sluggish reaction kinetics on OER catalysts.Developing advanced electrocatalysts with high activity and stability based on non-noble metal materials is still a grand challenge.Central to the rational design of novel and high-efficiency catalysts is the development and understanding of quantitative structure–activity relationships,which correlate the catalytic activities with structural and electronic descriptors.This paper comprehensively reviews the benchmark descriptors for OER electrolysis,aiming to give an in-depth understanding on the origins of the electrocatalytic activity of the OER and further contribute to building the theory of electrocatalysis.Meanwhile,the cutting-edge research frontiers for proposing new OER paradigms and crucial strategies to circumvent the scaling relationship are also summarized.Challenges,opportunities and perspectives are discussed,intending to shed some light on the rational design concepts and advance the development of more efficient catalysts for enhancing OER performance.

关键词： Oxygen evolution Energy conversion and storage Scaling relationship Catalytic descriptors Lattice oxygen oxidation

简单易得的自氧化纳米泡沫镍用于高性能析氢和析氧催化

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2023年第10期66卷 3855-3864页

作者：徐洪杰王新朝赵威郭瑞娟薛志勇张涛邵洋姚可夫 Institute for Advanced Materials North China Electric Power UniversityBeijing 102206China Key Laboratory of Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191China Key Laboratory for Advanced Materials Processing Technology Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Center for Advanced Analysis and Computational Science Zhengzhou UniversityZhengzhou 450001China

开发组成简单、无贵金属、制备简洁的自支撑析氢、析氧催化反应(HER和OER)催化剂是电解水的关键需求之一.本文以Mg_(80)Ni_(20)非晶合金薄带为前驱体,采用一步脱合金法制备了具有自支撑结构的自氧化纳米泡沫镍,在电流密度为10 mA cm^(-2... 详细信息

开发组成简单、无贵金属、制备简洁的自支撑析氢、析氧催化反应(HER和OER)催化剂是电解水的关键需求之一.本文以Mg_(80)Ni_(20)非晶合金薄带为前驱体,采用一步脱合金法制备了具有自支撑结构的自氧化纳米泡沫镍,在电流密度为10 mA cm^(-2)时HER和OER的过电位仅分别为33.1和330 mV,且均具有长达100 h的长期稳定性.基于纳米泡沫镍的水电解槽达到10 mA cm^(-2)的外加电压仅为1.58 V.纳米泡沫镍独特的三维超细多孔结构显著促进了其表观活性,同时其Ni/NiO复合结构显著提高了本征HER活性.本工作验证了纳米泡沫金属是一种有潜力的高性能催化材料.

关键词： metallic glass dealloying Ni nano-foam hydrogen evolution Oxygen evolution

Coupling interface constructions of FeOOH/NiCo_(2)S_(4)by microwave-assisted method for efficient Oxygen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第6期42卷 1847-1857页

作者： Ming-Liang Guo Zhi-Yu Wu Miao-Miao Zhang Zi-Jian Huang Ke-Xi Zhang Bing-Rong Wang Jin-Chun Tu State Key Laboratory of Marine Resource Utilization in the South China Sea College of Materials Science and EngineeringHainan UniversityHaikou570228China School of Science Hainan UniversityHaikou570228China

The Oxygen evolution reaction(OER) with slow kinetics is the rate-limiting step of electrochemical water splitting.A reasonable construction of interface nanostructures is the key to improving the OER efficiency and durability of non-noble metal electrocatalysts.In this study,a FeOOH/NiCo_(2)S_(4) core-shell nanorod array with abundant heterogeneous interfaces and high density of active sites was successfully prepared by a microwave-as sis ted method.Experimental research and theoretical calculations show that the abundant strong coupling Ni/Co-S-Fe interface helps in adjusting the electronic structure of the material surface,optimizing the adsorption energy of the intermediate,and realizing an efficient catalytic process.The as-synthesized FeOOH/NiCo_(2)S_(4)/NF composite electrode exhibited lower overpotential(198 mV) and Tafel slope(62 mV·dec^(-1)) at a current density of 10 mA·cm^(-2)and excellent stability(approximately 100% retention after100 h) than the NiCo_(2)S_(4)/nickel foam(NF).In conclusion,constructing heterojunctions with complementary active materials is an effective strategy to design efficient and robust OER electrocatalysts.

关键词： Transition metal sulfides FeOOH Interface structure Adsorption energy Oxygen evolution

Multiple metallic dopants in nickel nanoparticles for electrocatalytic Oxygen evolution

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2023年第1期33卷 67-73页

作者： Yan Huang Jingrui Han Haibin Wang Lihua Liu Hongyan Liang School of Materials Science and Engineering Tianjin University Key Laboratory of Efficient Utilization of Low and Medium Grade Energy Ministry of Education Tianjin University College of Innovation and Entrepreneurship Shanghai Jianqiao University

Developing efficient Oxygen evolution reaction(OER) electrocatalysts is of great importance for sustainable energy conversion and storage. Ni-based catalysts have shown great potential as OER electrocatalysts, but their performance still needs to be improved. Herein, we report the multiple metal doped nickel nanoparticles synthesized via a simple oil phase strategy as efficient OER catalysts. The FeMnMoV–Ni exhibits superior OER performance with an overpotential of 220 mV at 10 mA cm-2and a long-term stability of 250 h in 1 M KOH solution. In situ Raman analysis shows that the NiOOH site works as the active center and multiple metallic dopants facilitate the formation of NiOOH. Mo and V dopants promote the formation of high-valence state of Ni sites, and Mn dopants increase the electrochemical active surface area and expose more active sites. This work provides a novel strategy for catalyst design, which is critical for developing multiple metal doped catalysts.

关键词： Multiple metallic dopants Oxygen evolution Electrocatalysts In situ Raman Nickel

Trimetallic oxyhydroxides as active sites for large-current-density alkaline Oxygen evolution and overall water splitting

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第15期110卷 128-135页

作者： Lei Chen Yunpeng Wang Xin Zhao Yuchao Wang Qian Li Qichen Wang Yougen Tang Yongpeng Lei State Key Laboratory of Powder Metallurgy Hunan Key Laboratory of Two-Dimensional MaterialsCentral South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Physics and Electronics Hunan Key Laboratory for Super-micro structure and Ultrafast ProcessCentral South UniversityChangsha 410083China

Earth-abundant electrocatalysts for large-current-density water splitting under alkaline condition are desirable.Oxygen evolution reaction,which is a bottleneck of the overall water splitting,faces the problems of complicated reconstruction and deficiency in rational design of active sites.Herein,we report a series of transition metal chalcogenides for alkaline OER.Among them,FeCoNi(S)displayed a low overpotential of 293 m V to deliver a current density of 500 m A cm^(-2),which is in the top level of non-precious metal based OER electrocatalysts.A combination of(ex)in situ characterizations and DFT calculation shows that Ni(Fe,Co)trimetallic oxyhydroxides were the active sites for highly-efficient OER.Furthermore,for FeCoNi(S),when used as a bifunctional catalyst for water splitting,it only required a cell voltage of 1.84 V to deliver~500 m A cm^(-2) with extraordinary long-term stability over 2000 h.This work provides the comprehension of high-efficiency,robust catalysts for OER and overall water splitting at large current densities in alkaline media.

关键词： Oxygen evolution Active sites Surface reconstruction Large current density Overall water splitting

Freeze-drying synthesis of O,N-CeF_(3) with enhanced photocatalytic Oxygen evolution

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2023年第11期41卷 1714-1720,I0003页

作者： Bing Han Renke Bi Chutong Zhou Zhe Liu Zhiyu Wang State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang UniversityHangzhou310027China

Drying methods have been verified to have a considerable impact on photocatalytic efficiency via altering surface area.In this study,the preparations of O,N-CeF_(3) under identical conditions using the vacuum freezing method and the oven method are compared.Surface hydroxyl,as opposed to adsorbed oxygen in CeF_(3)-O,is the main component of O faults on the surface of CeF_(3)-V.Small particle size and the doping atom defects of CeF_(3)-V allow for more efficient separation and faster migration of photogenerated charge carriers.CeF_(3)-V has an Oxygen evolution rate of up to 1.4138 mmol/(g·h)and an apparent quantum yield of 90.90%at 550 nm.Energy tails are produced as a result of the doping O and N changing the intrinsic band structures.CeF_(3)-V shows a secondary conduction band potential that is sufficient for satisfying the minimal water oxidation potential simultaneously.These elucidate that defects in the states of doping O and N significantly influence CeF_(3) energy levels.Focusing on how the drying process affects the band structure and encourages carriers'separation via defects is valuable,which affects how well the photocatalysis works.

关键词： Photocatalysis Oxygen evolution Band structure Defect Freeze-drying Rare earths

Carbon-based bifunctional electrocatalysts for oxygen reduction and Oxygen evolution reactions:Optimization strategies and mechanistic analysis

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第8期31卷 234-265,I0008页

作者： Huidong Xu Jack Yang Riyue Ge Jiujun Zhang Ying Li Mingyuan Zhu Liming Dai Sean Li Wenxian Li Institute of Materials Shanghai University School of Materials Science and Engineering UNSW Materials and Manufacturing Futures InstituteUniversity of New South Wales Institute for Sustainable Energy Shanghai University School of Chemical Engineering University of New South Wales Shanghai Key Laboratory of High Temperature Superconductors

Electrocatalysts are one of the essential components for the devices of high-efficiency green energy storage and conversion,such as metal-air cells,fuel cells,and water electrolysis systems.While catalysts made from noble metals possess high catalytic performance in both oxygen reduction reaction(ORR)and Oxygen evolution reaction(OER),their scarcity and expensiveness significantly limit large-scale applications.In this regard,metal-free/non-noble metal carbon-based catalysts have become competitive alternatives to replace catalysts made of noble metals.Nevertheless,low catalytic ORR/OER performance is the challenge of carbon-based catalysts for the commercial applications of metal-air batteries.To solve the problem of poor catalytic performance,two strategies have been proposed:(1)controlling the microstructure of the catalysts to expose more active sites as the channels of rapid mass and electron transfer;and(2)reducing the reaction energy barrier by optimizing the electronic structures of the catalysts via surface engineering.Here,we review different types of bifunctional ORR/OER electrocatalysts with the activated surface sites.We focus on how the challenge can be overcome with different methods of material synthesis,structural and surface characterization,performance validation/optimization,to outline the principles of surface modifications behind catalyst designs.In particular,we provide critical analysis in the challenges that we are facing in structural design and surface engineering of bifunctional ORR/OER catalysts and indicate the possible solution for these problems,providing the society with clearer ideas on the practical prospects of noble-metal-free electrocatalysts for their future applications.

关键词： Electrocatalyst Bifunctionality oxygen reduction Oxygen evolution Carbons transition metals Surface engineering Microstructure

Immobilization of cobalt oxide nanoparticles on porous nitrogen-doped carbon as electrocatalyst for Oxygen evolution

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第12期52卷 10-18页

作者： Shusheng Li Rui Kuang Xiangzheng Kong Xiaoli Zhu Xubao Jiang College of Chemistry and Chemical Engineering University of JinanJinan 250022China College of Traffic Civil Engineering Shandong Jiaotong UniversityJinan 250357China

Highly efficient and robust electrocatalysts have been in urgent demand for Oxygen evolution reaction(OER).For this purpose,high-cost carbon materials,such as graphene and carbon nanotubes,have been used as supports to metal oxides to enhance their catalytic activity.We report here a new Co_(3)O_(4)-based catalyst with nitrogen-doped porous carbon material as the support,prepared by pyrolysis of porous polyurea(PU) with Co(NO_(3))_(2)immobilized on its surface.To this end,PU was first synthesized,without any additive,through a very simple one-step precipitation polymerization of toluene diisocyanate in a binary mixture of H2O-acetone at room temperature.By immersing PU in an aqueous solution of Co(NO_(3))_(2)at room temperature,a cobalt coordinated polymer composite,Co(NO_(3))_(2)/PU,was obtained,which was heated at 500℃ in air for 2 h to get a hybrid,Co_(3)O_(4)/NC,consisting of Co_(3)O_(4)nanocrystals and sp2-hybridized N-doped carbon.Using this Co_(3)O_(4)/NC as a catalyst in OER,a current density of10 mA·cm^(-2)was readily achieved with a low overpotential of 293 mV with a Tafel slope of87 mV·dec^(-1),a high catalytic activity.This high performance was well retained after 1000 recycled uses,demonstrating its good durability.This work provides therefore a facile yet simple pathway to fabrication of a new transition metal oxides-based N-doped carbon catalyst for OER with high performance.

关键词： Porous polyurea N-doped carbon-Co_(3)O_(4)hybrid Oxygen evolution Catalyst Electrolysis Electrochemistry

Directing in-situ self-optimization of single-atom catalysts for improved Oxygen evolution

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第5期80卷 284-290,I0007页

作者： Peiyu Ma Chen Feng Huihuang Chen Jiawei Xue Xinlong Ma Heng Cao Dongdi Wang Ming Zuo Ruyang Wang Xilan Ding Shiming Zhou Zhirong Zhang Jie Zeng Jun Bao Hefei National Research Center for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of SciencesKey Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei230026AnhuiChina National Synchrotron Radiation Laboratory iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)University of Science and Technology of ChinaHefei 230026AnhuiChina

The demand for clean and sustainable energy has encouraged the production of hydrogen from water electrolyzers.To overcome the obstacle to improving the efficiency of water electrolyzers,it is highly desired to fabricate active electrocatalysts for the sluggish Oxygen evolution process.However,there is generally an intrinsic gap between the as-prepared and real electrocatalysts due to structure evolution under the oxidative reaction conditions.Here,we combine in-situ anionic leaching and atomic deposition to realize single-atom catalysts with self-optimized structures.The introduced F ions facilitate structural transformation from Co(OH)xF into CoOOH(F),which generates an amorphous edge surface to provide more anchoring sites for Ir single atoms.Meanwhile,the in-situ anionic leaching of F ions elevates the Co valence state of Ir_(1)/CoOOH(F)more significantly than the counterpart without F ions(Ir_(1)/CoOOH),leading to stronger adsorption of oxygenated intermediates.As revealed by electrochemical measurements,the increased Ir loading together with the favored adsorption of*OH intermediates improve the catalytic activity of Ir_(1)/CoOOH(F).Specifically,Ir_(1)/CoOOH(F)delivered a current density of 10 mA cm-2at an overpotential of 238 mV,being lower than 314 mV for Ir_(1)/CoOOH.The results demonstrated the facility of the in-situ optimization process to optimize catalyst structure for improved performance.

关键词： Electrocatalysis Single-Atom Catalysis Self-Optimization Oxygen evolution

Recent Progress of Metal Organic Frameworks-Based Electrocatalysts for Hydrogen evolution,Oxygen evolution,and oxygen Reduction Reaction

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2022年第4期5卷 1084-1102页

作者： Yaling Jia Ziqian Xue Yinle Li Guangqin Li MOE Laboratory of Bioinorganic and Synthetic Chemistry Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China Institute for Integrated Cell-Material Sciences(iCeMS) Kyoto UniversityKyoto 606-8501Japan

Exploring efficient and cost-saving electrocatalysts is essential to the renewable energy storage and utilization,which is still in its embryonic period.MOFs have drawn tremendous attention due to their adjustability,abundant active sites,and plentiful pores.Notably,satisfactory electrocatalytic performance has been achieved by MOFs-based electrocatalysts comparable to traditional electrocatalysts.State-of-the-art works about the MOFs-based electrocatalysts for hydrogen evolution reaction(HER),Oxygen evolution reaction(OER),and ORR were summarized in this review.This review comprises a series of modifying strategies of MOFs and their derivatives,from aspects of structure,composition,and morphology.Furthermore,the active sites and functional mechanisms’recognition are involved in this review expecting to provide reference for rationally designing efficient electrocatalysts.At last,the current status,challenges,and perspectives of MOFs-based electrocatalysts are also discussed.

关键词： electrocatalysts hydrogen evolution metal organic frameworks Oxygen evolution oxygen reduction reaction