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Roles of heteroatoms in electrocatalysts for alkaline water splitting:A review focusing on the reaction mechanism

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Chinese Journal of Catalysis 2022年第8期43卷 2091-2110页

作者： Chuqiang Huang Jianqing Zhou Dingshuo Duan Qiancheng Zhou Jieming Wang Bowen Peng Luo Yu Ying Yu Institute of Nanoscience and Nanotechnology College of Physical Science and TechnologyCentral China Normal UniversityWuhan 430079HubeiChina Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong 999077China Institute for Advanced Materials Hubei Normal UniversityHuangshi 435002HubeiChina

alkaline water splitting is a promising technology for“green hydrogen”*** improve its efficiency,highly robust catalysts are required to reduce the overpotential for low electrical power *** modification is one of the most effective strategies for boosting catalytic performance,as it can regulate the physicochemical properties of host catalysts to improve their intrinsic ***,aiming to provide an overview of the impact of heteroatoms on catalytic activity at the atomic level,we present a review of the key role of heteroatoms in enhancing reaction kinetics based on the reaction pathways of the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in alkaline *** particular,the introduction of heteroatoms can directly and indirectly optimize the interactions between the active sites and intermediates,thus improving the intrinsic *** clearly illustrate this influence in detail,we have summarized a series of representative heteroatom-modified electrocatalysts and discussed the important roles of heteroatoms in the OER and HER reaction ***,some challenges and perspectives for heteroatom-modified electrodes are *** hope that this review will be helpful for the development of efficient and low-cost electrocatalysts for water electrolysis and other energy conversion applications.

关键词： alkaline water splitting Heteroatom modification Reaction pathway Hydrogen evolution reaction Oxygen evolution reaction

Self-supported NiFe-LDH nanosheets on NiMo-based nanorods as high-performance bifunctional electrocatalysts for overall water splitting at industrial-level current densities

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Nano Research 2024年第5期17卷 3769-3776页

作者： Yan Zhang Biao Feng MingLei Yan Zhen Shen Yiqun Chen Jingyi Tian Fengfei Xu Guanghai Chen Xizhang Wang Lijun Yang Qiang Wu Zheng Hu Key Laboratory of Mesoscopic Chemistry of Ministry of Education(MOE)and Jiangsu Provincial Lab for Nanotechnology School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China College of water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYa’an 625014China

Efficient,durable and economic electrocatalysts are crucial for commercializing water electrolysis ***,we report an advanced bifunctional electrocatalyst for alkaline water splitting by growing NiFe-layered double hydroxide(NiFe-LDH)nanosheet arrays on the conductive NiMo-based nanorods deposited on Ni foam to form a three-dimensional(3D)architecture,which exhibits exceptional performances for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).In overall water splitting,only the low operation voltages of 1.45/1.61 V are required to reach the current density of 10/500 mA·cm^(-2),and the continuous water splitting at an industrial-level current density of 500 mA·cm^(-2) shows a negligible degradation(1.8%)of the cell voltage over 1000 *** outstanding performance is ascribed to the synergism of the HER-active NiMo-based nanorods and the OER-active NiFe-LDH nanosheet arrays of the hybridized 3D ***,the dense NiFe-LDH nanosheet arrays enhance the local pH on cathode by retarding OH-diffusion and enlarge the electrochemically active surface area on anode,while the conductive NiMo-based nanorods on Ni foam much decrease the charge-transfer resistances of both *** study provides an efficient strategy to explore advanced bifunctional electrocatalysts for overall water splitting by rationally hybridizing HER-and OER-active components.

关键词： alkaline water splitting bifunctional electrocatalysts layered double hydroxides high durability industrial current densities

A multi-step induced strategy to fabricate core-shell Pt-Ni alloy as symmetric electrocatalysts for overall water splitting

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Nano Research 2022年第2期15卷 965-971页

作者： Wenjuan Xu Jinfa Chang Yinggang Cheng Hongqi Liu Jifan Li Yongjian Ai Zenan Hu Xinyue Zhang Yiming Wang Qionglin Liang Yang Yang Hongbin Sun Department of Chemistry Northeastern UniversityShenyang 110819China NanoScience Technology Center Department of Materials Science and EngineeringUniversity of Central FloridaOrlandoFL 32826USA Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education) Department of ChemistryCenter for Synthetic and Systems BiologyTsinghua UniversityBeijing 100084China

Devising an electrocatalyst with brilliant efficiency and satisfactory durability for hydrogen production is of considerable demand,especially for large-scale ***,we adopt a multi-step consequential induced strategy to construct a bifunctional electrocatalyst for the overall water *** oxide(GO)was used as a carbon matrix and in situ oxygen source,which was supported by the octahedral PtNi alloy to form the PtxNiy-GO *** calcinating in Ar atmosphere,the oxygen in GO induced the surface segregation of Ni from the PtNi octahedron to form a core-shell structure of Ptx@***,the surface-enriched Ni continuously induced the reformation of C in reduced graphene oxide(rGO)to enhance the degree of *** multi-step induction formed a nanocatalyst Pt_(x)@Ni_(y)-rGO which has very high catalytic efficiency and *** optimizing the feeding ratio of PtNi(Pt:Ni=1:2),the electrolytic overall water splitting at 10 mA·cm^(-2) can be driven by an electrolytic voltage of as low as 1.485 V,and hydrogen evolution reaction(HER)only needs an overpotential of 37 mV in 1.0 M KOH aqueous ***,the catalyst exhibited consistent existence form in both HER and oxygen evolution reaction(OER),which was verified by switching the anode and cathode of the cell in the electrolysis of *** work provides a new idea for the synthesis and evaluation of the bifunctional catalysts for water splitting.

关键词： continuous induction core-shell structured Pt@Ni graphene oxide hydrogen evolution reaction alkaline water splitting

Hetero-interfacial nickel nitride/vanadium oxynitride porous nanosheets as trifunctional electrodes for HER,OER and sodium ion batteries

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Journal of Energy Chemistry 2023年第6期81卷 71-81,I0003页

作者： Tuzhi Xiong Jingting Li Jagadish Chandra Roy Malcolm Koroma Zhixiao Zhu Hao Yang Lei Zhang Ting Ouyang M.-Sadeeq Balogun Mohammad Al-Mamun College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangsha 410082HunanChina Centre for Catalysis and Clean Energy Griffith UniversityGold Coast CampusSouthportQLD 4222Australia College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082HunanChina Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry&Chemical EngineeringGuangxi UniversityNanning 530004GuangxiChina Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004GuangxiChina

The development of single electrode with multifunctional purposes for electrochemical devices remains a symbolic challenge in recent *** work explores interfacially-rich transition metal nitride hybrid that consist of nickel nitride and vanadium oxynitride(VO_(0.26)N_(0.52))on robust carbon fiber(denoted CF/Ni_(3)N/VON)as trifunctional electrode for hydrogen evolution reaction(HER),oxygen evolution reaction(OER),and sodium ion batteries(SIBs).The as-prepared CF/Ni_(3)N/VON exhibits low HER overpotential of 48 m V@10 m A cm^(-2),OER overpotential of 287 m V@10 m A cm^(-2),and sodium-ion anode storage reversible capacity of 555 m A h g^(-1)@0.2 *** analyses reveal that the Ni_(3)N effectively facilitates hydrogen desorption for HER,increases the electrical conductivity for OER,and promotes the Na-ion storage intercalation process,while the VON substantially elevates the water dissociation kinetics for HER,accelerates the adsorption of OH*intermediate for OER and enhances the Na-ion surface adsorption storage *** to the excellent HER and OER performances of the CF/Ni_(3)N/VON electrode,an overall water splitting device denoted as CF/Ni_(3)N/VON//CF/Ni_(3)N/VON was not only assembled showing an operating voltage of 1.63 V at current density of 10 m A cm^(-2)but was also successfully self-powered by the assembled CF/Ni_(3)N/VON//CF/Na_(3)V_(2)(PO_(4))_(3) flexible sodium ion *** work will contribute to the development of efficient and cost-effective flexible integrated electrochemical energy devices.

关键词： Interstitial nitride Trifunctional electrode Heterointerface alkaline water splitting Sodium ion battery

Noble-Metal-Free Oxygen Evolution Reaction Electrocatalysts Working at High Current Densities over 1000 mA cm^(-2):From Fundamental Understanding to Design Principles

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Energy & Environmental Materials 2023年第5期6卷 43-59页

作者： Xian Zhang Mengtian Jin Feifei Jia Jiaqi Huang Abbas Amini Shaoxian Song Hao Yi Chun Cheng School of Resources and Environmental Engineering Wuhan University of TechnologyWuhan 430070China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Center for Infrastructure Engineering Western Sydney UniversityKingswood NSW 2751Australia Guangdong Provincial Key Laboratory of Energy Materials for Electric Power Southern University of Science and TechnologyShenzhen 518055China

alkaline water electrolysis provides a promising route for"green hydrogen"generation,where anodic oxygen evolution reaction(OER)plays a crucial role in coupling with cathodic hydrogen evolution *** date,the development of highly active and durable OER catalysts based on earth-abundant elements has drawn wide attention;nevertheless,their performance under high current densities(HCDs≥1000 mA cm^(-2))has been less *** situation has seriously impeded large-scale electrolysis *** this review,in order to provide a guideline for designing high-performance OER electrocatalysts,the effects of HCD on catalytic performance involving electron transfer,mass transfer,and physical/chemical stability are ***,the design principles were pointed out for obtaining efficient and robust OER electrocatalysts in light of recent progress of OER electrocatalysts working above 1000 mA cm^(-2).These include the aspects of developing self-supported catalytic electrodes,enhancing intrinsic activity,enhancing the catalyst-support interaction,engineering surface wettability,and introducing protective ***,summaries and outlooks in achieving OER at industrially relevant HCDs are proposed.

关键词： alkaline water splitting high current density long-term stability noble-metal-free electrocatalysts oxygen evolution reaction

Synergistic effect between Co single atoms and Pt nanoparticles for efficient alkaline hydrogen evolution

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Materials Futures 2024年第3期3卷 111-120页

作者： Chengyong Shu Jingwen Cao Zhuofan Gan Peixi Qiu Zhixu Chen Lian Guanwu Zhongxin Chen Chengwei Deng Wei Tang School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Science and Engineering The Chinese University of Hong KongShenzhenGuangdong 518172People’s Republic of China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power SourcesShanghai 200245People’s Republic of China

In the pursuit of sustainable energy solutions,the efficiency of the hydrogen evolution reaction(HER)in alkaline conditions has been a significant challenge,primarily due to the sluggish dissociation of water molecules on platinum(Pt)*** this critical issue,our study introduces an innovative Pt-Co@NCS *** catalyst synergistically combines Pt nanoparticles with Co single atoms on a nitrogen-doped carbon scaffold,overcoming the traditional bottleneck of slow water *** unique porous concave structure and nitrogen-enriched surface not only provide abundant anchoring sites for Co atoms but also create a conducive hydrophilic environment around the Pt *** design leads to a drastic improvement in the water dissociation process,as demonstrated by CO stripping and deuterium labeling *** an outstanding current density of 162.8 mA cm^(−2) at−0.1 V versus RHE,a Tafel slope of 26.2 mV dec^(−1),and a superior nominal mass activity of 15.75 mAμgPt^(−1),the Pt-Co@NCS catalyst represents a significant step forward in enhancing alkaline HER efficiency,indicating promising advancements in the field.

关键词： synergistic catalysis single atom catalysts alkaline water splitting flow electrolyser hydrogen evolution