检索结果-南通市图书馆

China Petroleum Processing & Petrochemical Technology 2022年第2期24卷 91-100页

作者： Jiang Bolong Shi Shunjie Cui Yanyan Jiang Nan Innovation Institute for Sustainable Maritime Architecture Research and Technology Qingdao University of TechnologyQingdao Shandong 266000 Institute of Environmental and Municipal Engineering Qingdao University of TechnologyQingdaoShandong 266000

A series of NiMoO_(4)-nano rod/carbon cloth composite electrodes with different loadings(x)of NiMoO_(4)-NRs was synthesized with a view to implementing an efficient hydrogen evolution reaction(HER).The NiMoO_(4) nano-rods(NRs)were prepared by growing them directly on carbon cloth(CC)via a simple hydrothermal reaction coupled with an annealing treatment.The resulting NiMoO_(4)-NR/CC-x composites served directly as electrodes for electrolysis of an alkaline medium and a simulated sea water.The results indicated that among the NiMoO_(4)-NR/CC-x composites,the NiMoO_(4)-NR/CC-10 composite possessed the highest HER activity with an overpotential of 244.8 mV at 10 mA/cm^(2),a Tafel slope of 95 mV/dec,the fastest charge transfer rate(R_(ct)<1Ω)and good stability in alkaline media.Even in simulated seawater,the NiMoO_(4)-NR/CC-10 composite showed good stability.The outstanding HER activity and stability may originate from the strong interaction between Ni and Mo in the NiMoO_(4) NRs as well as the efficient charge transfer process and the rate of the HER due to the synergistic effect involving the CC and NiMoO_(4) NRs.

关键词： hydrogen evolution reaction catalyst NiMoO_(4)nano-rods carbon cloth alkaline electrolyte simulated seawater

Fabricating Ru single atoms and clusters on CoP for boosted hydrogen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2023年第4期42卷 46-50页

作者： Xiaoqi Wang Jitang Zhang Zongpeng Wang Zhiping Lin Shijie Shen Wenwu Zhong School of Material Science and Engineering Taizhou UniversityTaizhou318000China

Single atom catalysts(SATs)process the highest utilization efficiency of noble metals.The synergistic effect of noble single atoms and clusters,however,is insufficiently explored.In this work,Ru single atoms and clusters are fabricated on CoP substrate simultaneously,using a facile synchronous phosphorization method,with pre-prepared CoOOH and RuCl_(3)mixture as the raw materials.It is demonstrated that strong charge transfer is established between Co and Ru elements,which leads to electron-sufficient Ru sites.As a result,the Ru species decorated CoP exhibits excellent electrocatalytic activity for HER,with an overpotential of 32 mV to afford a current density of 10 mA/cm^(2)and a Tafel slope of 37.6 mV/dec,much better than the pure CoP counterpart.This work provides insights into the exploration of synergistic effect of noble metal single atoms and clusters fabricated on transition metal phosphide substrate.

关键词： Single atom Cluster CoP hydrogen evolution reaction

Phosphated IrMo bimetallic cluster for efficient hydrogen evolution reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

eScience 2022年第3期2卷 304-310页

作者： Xu Guo Xin Wan Qingtao Liu Yongcheng Li Wenwen Li Jianglan Shui School of Materials Science and Engineering Beihang UniversityBeijing100191China Qinghai Provincial Key Laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High-Performance Light Metal Alloys and FormingQinghai UniversityXining810016China

Developing low-cost,high-performance electrocatalysts for the hydrogen evolution reaction(HER)is essential for producing hydrogen from renewable energy sources.Herein,we report phosphated IrMo bimetallic clusters supported by macroporous nitrogen-doped carbon(IrMoP/MNC)as a highly efficient alkaline HER catalyst.The experimental and theoretical results demonstrate that P and Mo synergistically tune the electronic structure of atomically dispersed Ir to improve adsorption of the reactant H_(2)O and desorption of the product OH^(-).P itself serves as an active site and cooperates with the nearby Ir atom to significantly enhance the HER kinetics.Even with only 2.6 wt%Ir in the catalyst,IrMoP/MNC exhibits an ultralow overpotential of 14 mV at 10 mA cm^(-2),as well as an unprecedented high mass activity of 18.58 A mg Ir^(-1) at an overpotential of 100 mV,superior to commercial Pt/C and overwhelmingly better than other Ir-based electrocatalysts.This study demonstrates a multi-level design strategy to effectively improve the atom efficiency of a noble metal,involving spatial geometry,local electronic structure,and dual-atom synergy.

关键词： Ir catalyst Bimetallic cluster Phosphated Synergy hydrogen evolution reaction

Atomically thin transition metal dichalcogenides for the hydrogen evolution reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ChemPhysMater 2022年第2期1卷 102-111页

作者： Jianqi Zhu Rong Yang Guangyu Zhang Laboratory of Micro-Nano Optics School of Physics and Electronic EngineeringSichuan Normal UniversityChengdu 610101China Institute of Physics Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

hydrogen is a sustainable and environmentally friendly fuel produced by electrolytic water splitting.This re-quires efficient and easily accessible electrocatalysts to minimize energy consumption.Recently,as a substitute to the conventional noble-metal-based catalysts,two-dimensional transition metal dichalcogenides(TMDs)have demonstrated their potential as inexpensive catalysts for the hydrogen evolution reaction(HER).In this review,we offer an overview of recent progresses in the development of layered TMDs for the HER.The improvements in TMD catalytic activity in terms of nanostructuring,defect and boundary engineering,heteroatom doping,and interaction with the supporting material are presented.We summarize with a perspective on the challenges for the future development of highly effective TMD catalysts for the HER.

关键词： Transition metal dichalcogenides hydrogen evolution reaction Electrocatalysts Catalytic performance Two-dimensional materials Nanostructures

Activating the hydrogen evolution reaction in low-dimensional carbon by partial hydrogenation: Role of the hybrid sp^(2) -sp^(3) orbital interface

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ChemPhysMater 2023年第2期2卷 180-184页

作者： Hanqing Yin Aijun Du School of Chemistry and Physics Queensland University of TechnologyBrisbane 4001Australia QUT Centre for Materials Science Queensland University of TechnologyBrisbane 4001Australia

Developing highly efficient catalyst for the hydrogen evolution reaction(HER)and understanding their mecha-nism is crucial for establishing the hydrogen economy.Carbon-based materials are particularly attractive as HER catalysts because of their abundance and morphological variety.Herein,using density functional theory(DFT)calculations,we propose for the first time a virtual interface consisting of sp^(2) and sp^(3) orbitals of carbon,for acti-vating the intrinsically inert low-dimensional carbon toward the HER.This hybrid orbital interface is generated by pre-adsorbed hydrogen introduced by the partial hydrogenation of these low-dimensional carbon materials(C_(60),carbon nanotubes and graphene).The pre-adsorbed hydrogen can activate adjacent carbon atoms to become active sites for the HER.The best performance among these sites is comparable to that of the commercial Pt/C catalyst.Given that the partial hydrogenation of low-dimensional carbon has been experimentally realized,our work provides a simple yet novel concept for HER catalyst design.

关键词： Density functional theory hydrogen evolution reaction Low-dimensional carbon Orbital interface

Engineering Ruthenium-Based Electrocatalysts for Effective hydrogen evolution reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第10期13卷 288-307页

作者： Yingjie Yang Yanhui Yu Jing Li Qingrong Chen Yanlian Du Peng Rao Ruisong Li Chunman Jia Zhenye Kang Peilin Deng Yijun Shen Xinlong Tian State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228People’s Republic of China

The investigation of highly effective,durable,and cost-effective electrocatalysts for the hydrogen evolution reaction(HER)is a prerequisite for the upcoming hydrogen energy society.To establish a new hydrogen energy system and gradually replace the traditional fossil-based energy,electrochemical water-splitting is considered the most promising,environmentally friendly,and efficient way to produce pure hydrogen.Compared with the commonly used platinum(Pt)-based catalysts,ruthenium(Ru)is expected to be a good alternative because of its similar hydrogen bonding energy,lower water decomposition barrier,and considerably lower price.Analyzing and revealing the HER mechanisms,as well as identifying a rational design of Ru-based HER catalysts with desirable activity and stability is indispensable.In this review,the research progress on HER electrocatalysts and the relevant describing parameters for HER performance are briefly introduced.Moreover,four major strategies to improve the performance of Ru-based electrocatalysts,including electronic effect modulation,support engineering,structure design,and maximum utilization(single atom)are discussed.Finally,the challenges,solutions and prospects are highlighted to prompt the practical applications of Rubased electrocatalysts for HER.

关键词： hydrogen evolution reaction Ruthenium-based catalysts Performance Electrochemical water splitting

Single-Atom Catalysts for Electrochemical hydrogen evolution reaction: Recent Advances and Future Perspectives

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2020年第2期12卷 73-101页

作者： Zonghua Pu Ibrahim Saana Amiinu Ruilin Cheng Pengyan Wang Chengtian Zhang Shichun Mu Weiyue Zhao Fengmei Su Gaixia Zhang Shijun Liao Shuhui Sun Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications VarennesQC J3X 1S2Canada State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China The Key Laboratory of Fuel Cell Technology of Guangdong Province The Key Laboratory of New Energy Technology of Guangdong UniversitiesSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641People’s Republic of China Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002People’s Republic of China

hydrogen,a renewable and outstanding energy carrier with zero carbon dioxide emission,is regarded as the best alternative to fossil fuels.The most preferred route to large-scale production of hydrogen is by water electrolysis from the intermittent sources(e.g.,wind,solar,hydro,and tidal energy).However,the efficiency of water electrolysis is very much dependent on the activity of electrocatalysts.Thus,designing high-effective,stable,and cheap materials for hydrogen evolution reaction(HER)could have a substantial impact on renewable energy technologies.Recently,single-atom catalysts(SACs)have emerged as a new frontier in catalysis science,because SACs have maximum atom-utilization efficiency and excellent catalytic reaction activity.Various synthesis methods and analytical techniques have been adopted to prepare and characterize these SACs.In this review,we discuss recent progress on SACs synthesis,characterization methods,and their catalytic applications.Particularly,we highlight their unique electrochemical characteristics toward HER.Finally,the current key challenges in SACs for HER are pointed out and some potential directions are proposed as well.

关键词： Single-atom catalysts Nanomaterials Electrocatalyst hydrogen evolution reaction Electrochemical energy conversion

Ultra-small hollow ternary alloy nanoparticles for efficient hydrogen evolution reaction

在线全文

学校读者我要写书评

暂无评论

National Science Review 2021年第7期8卷 185-197页

作者： Zhenxing Li Chengcheng Yu Yikun Kang Xin Zhang Yangyang Wen Zhao-Kui Wang Chang Ma Cong Wang Kaiwen Wang Xianlin Qu Miao He Ya-Wen Zhang Weiyu Song State Key Laboratory of Heavy Oil Processing College of New Energy and Materials Beijing Key Laboratory of Biogas Upgrading Utilization China University of Petroleum (Beijing) College of Science China University of Petroleum (Beijing) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University Beijing Key Laboratory and Institute of Microstructure and Property of Advanced Materials Beijing University of Technology Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications PKU–HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry College of Chemistry and Molecular Engineering Peking University

Hollow nanoparticles with large specific surface area and high atom utilization are promising catalysts for the hydrogen evolution reaction(HER). We describe herein the design and synthesis of a series of ultra-small hollow ternary alloy nanostructures using a simple one-pot strategy. The same technique was demonstrated for hollow PtNiCu nanoparticles, hollow PtCoCu nanoparticles and hollow CuNiCo nanoparticles. During synthesis, the displacement reaction and oxidative etching played important roles in the formation of hollow structures. Moreover, our hollow PtNiCu and PtCoCu nanoparticles were single crystalline, with an average diameter of 5 nm. Impressively, ultra-small hollow PtNiCu nanoparticles,containing only 10% Pt, exhibited greater electrocatalytic HER activity and stability than a commercial Pt/C catalyst. The overpotential of hollow Pt Ni Cu nanoparticles at 10 mA cm-2was 28 mV versus reversible hydrogen electrode(RHE). The mass activity was 4.54 A mg Pt-1at-70 mV versus RHE, which is 5.62-fold greater than that of a commercial Pt/C system(0.81 A mg Pt-1). Through analyses of bonding and antibonding orbital filling, density functional theory calculations demonstrated that the bonding strength of different metals to the hydrogen intermediate(H*) was in the order of Pt > Co > Ni > Cu. The excellent HER performance of our hollow PtNiCu nanoparticles derives from moderately synergistic interactions between the three metals and H*. This work demonstrates a new strategy for the design of low-cost and high-activity HER catalysts.

关键词： ultra-small hollow nanostructure hydrogen evolution reaction density functional theory

Three-Dimensional Hierarchical Nanostructured Cu/Ni–Co Coating Electrode for hydrogen evolution reaction in Alkaline Media

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2015年第4期7卷 347-352页

作者： Ning Wang Tao Hang Dewei Chu Ming Li State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Key Laboratory for Thin Film and Microfabrication of Ministry of EducationShanghai Jiao Tong University School of Materials Science & Engineering University of New South Wales

In this work,three-dimensional hierarchical nickel–cobalt alloy coating for hydrogen evolution cathode was fabricated by electrodeposition processes.The coatings’morphology evolves from sea cucumber-like nanostructure to caterpillar-like one with the increase of cobalt content.A large amount of nanometric‘‘steps,’’served as the active sites for hydrogen evolution reaction,were observed.According to Tafel polarization measurements,the exchange current density of the as-synthesized coating with hierarchical nanostructure was 21.9 times compared with that of flat nickel coating.In addition,the hierarchical coating also displayed good electrochemical stability from the galvanostatic test.

关键词： Electrodeposition Ni–Co alloy Hierarchical hydrogen evolution reaction

In situ growth of different numbers of gold nanoparticles on MoS_2 with enhanced electrocatalytic activity for hydrogen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第6期27卷 473-478页

作者：赵宣何大伟王永生付晨 Key Laboratory of Luminescence and Optical Information Beijing Jiaotong University

Producing hydrogen through a hydrogen evolution reaction（HER） by splitting water at the suitable overpotential is a great alternative to solving the problems of environmental pollution and the energy crisis. Molybdenum sulfide（MoS2）has attracted extensive attention as one of the most promising catalytic materials for HER. In this work, we design a facile method to in situ grow gold nanoparticles（Au NPs） on MoS2. Different numbers of Au NPs with MoS2 are used to find the best catalytic activity. Due to the larger active surface area and higher conductivity of the Au–MoS2 composites, all the Au–MoS2 composites exhibit more enhanced HER electroactivity than pure MoS2. In brief, the new material architecture exhibits optimized HER activity with a low onset overpotential of 0.12 V, low Tafel slope of 0.163 V·dec^（-1）, and an excellent stability in acidic solution.

关键词： MoS2 AuNPs hydrogen evolution reaction electrocatalysts