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Shining Light on Anion-Mixed Nanocatalysts for Efficient Water Electrolysis: Fundamentals, Progress, and Perspectives

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Nano-Micro Letters 2022年第3期14卷 79-119页

作者： Yaoda Liu Paranthaman Vijayakumar Qianyi Liu Thangavel Sakthivel Fuyi Chen zhengfei dai State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China

Hydrogen with high energy density and zero carbon emission is widely acknowledged as the most promising candidate toward world’s carbon neutrality and future sustainable ***-splitting is a constructive technology for unpolluted and high-purity H2 production,and a series of non-precious electrocatalysts have been developed over the past *** further improve the catalytic activities,metal doping is always adopted to modulate the 3d-electronic configuration and electron-donating/accepting(e-DA)properties,while for anion doping,the electronegativity variations among different non-metal elements would also bring some potential in the modulations of e-DA and metal valence for tuning the *** this review,we summarize the recent developments of the many different anion-mixed transition metal compounds(e.g.,nitrides,halides,phosphides,chalcogenides,oxyhydroxides,and borides/borates)for efficient water electrolysis ***,we have introduced the general information of water-splitting and the description of anion-mixed electrocatalysts and highlighted their complementary functions of mixed ***,some latest advances of anion-mixed compounds are also categorized for hydrogen and oxygen evolution *** rationales behind their enhanced electrochemical performances are *** but not least,the challenges and future perspectives are briefly proposed for the anion-mixed water dissociation catalysts.

关键词： Multianions Electrocatalysts Water electrolysis Hydrogen energy Oxygen evolution

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Interface and M^(3+)/M^(2+)Valence Dual-Engineering on Nickel Cobalt Sulfoselenide/Black Phosphorus Heterostructure for Efficient Water Splitting Electrocatalysis

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Energy & Environmental Materials 2023年第2期6卷 165-174页

作者： Tingting Liang Syama Lenus Yaoda Liu Ya Chen Thangavel Sakthivel Fuyi Chen Fei Ma zhengfei dai State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China

The catalyst innovation that aims at noble-metal-free substitutes is one key aspect for future sustainable hydrogen energy *** this paper,a nickel cobalt sulfoselenide/black phosphorus heterostructure(NiCoSe|S/BP)was fabricated to realize the highly active and durable water electrolysis through interface and valence *** NiCoSe|S/BP nanostructure was constructed by in-situ growing NiCo hydroxide nanosheet arrays on few-layer BP and subsequently one-step sulfoselenization by *** the conductive merit of BP substrate,holes in p-type BP are capable of oxidizing the Co^(2+)to high-valence and electron-accepting Co^(3+),benefiting the oxygen evolution reaction(OER).Meanwhile,Ni^(3+)/Ni^(2+)ratio in the heterostructure is reduced to maintain the electrical neutrality,which corresponds to the increased electron-donating character for boosting hydrogen evolution reaction(HER).As for HER and OER,the heterostructured NiCoSe|S/BP electrocatalyst exhibits small overpotentials of 172 and 285 mV at 10 mA cm^(-2)(η_(10))in alkaline media,*** overall water splitting has been achieved at a low cell potential of 1.67 V at η_(10) with high *** sensing and density functional theory(DFT)calculations are further proposed for understanding the rate-determine steps and enhanced catalytic *** investigation presents a deep-seated perception for the electrocatalytic performance enhancement of BP-based heterostructure.

关键词： black phosphorus interface engineering metal sulfoselenide overall water splitting valence regulation

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Covalently Bonded Ni Sites in Black Phosphorene with Electron Redistribution for Efficient Metal‑Lightweighted Water Electrolysis

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Nano-Micro Letters 2024年第6期16卷 233-245页

作者： Wenfang Zhai Ya Chen Yaoda Liu Yuanyuan Ma Paranthaman Vijayakumar Yuanbin Qin Yongquan Qu zhengfei dai State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China SSN Research Centre SSN College of EngineeringChennaiTamil Nadu 603110India

The metal-lightweighted electrocatalysts for water splitting are highly desired for sustainable and economic hydrogen energy deployments,but *** this work,a low-content Ni-functionalized approach triggers the high capability of black phosphorene(BP)with hydrogen and oxygen evolution reaction(HER/OER)*** a facile in situ electro-exfoliation route,the ionized Ni sites are covalently functionalized in BP nanosheets with electron redistribution and controllable metal *** is found that the as-fabricated Ni-BP electrocatalysts can drive the water splitting with much enhanced HER and OER *** 1.0 M KOH electrolyte,the optimized 1.5 wt%Nifunctionalized BP nanosheets have readily achieved low overpotentials of 136 mV for HER and 230 mV for OER at 10 mA cm^(−2).Moreover,the covalently bonding between Ni and P has also strengthened the catalytic stability of the Ni-functionalized BP electrocatalyst,stably delivering the overall water splitting for 50 h at 20 mA cm^(−2).Theoretical calculations have revealed that Ni–P covalent binding can regulate the electronic structure and optimize the reaction energy barrier to improve the catalytic activity *** work confirms that Ni-functionalized BP is a suitable candidate for electrocatalytic overall water splitting,and provides effective strategies for constructing metal-lightweighted economic electrocatalysts.

关键词： Black phosphorus Water electrolysis Electrocatalyst Electron redistribution Covalent functionalization

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Recent progress on the long-term stability of hydrogen evolution reaction electrocatalysts

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InfoMat 2022年第9期4卷 17-59页

作者： Wenfang Zhai Yuanyuan Ma Dong Chen Johnny C.Ho zhengfei dai Yongquan Qu Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'anChina State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'anChina Department of Materials Science and Engineering City University of Hong KongHong KongChina Shenzhen Research Institute City University of Hong KongShenzhenChina

Developing new methodologies to produce clean and renewable energy resources is pivotal for carbon-neutral ***(H2)is considered as an ideal energy resource due to its nontoxic,pollution-free,high utilization rate,and high calorific combustion *** of water driven by the electricity generated from renewable and clean energy sources(e.g.,solar energy,wind energy)to produce hydrogen attracts great efforts for hydrogen production with high ***,the breakthrough of the catalyst activity limit for the hydrogen evolution reaction(HER)catalysts has received extensive ***,fewer reviews have focused on the long-term stability of HER catalysts,which is indeed decisive for large-scale electrolytic ***,a systematic summary concentrated on the durability of HER electrocatalysts would provide a fundamental understanding of the electrocatalytic performance for practical applications and offer new opportunities for the rational design of the highly performed HER *** review summarizes the research progress toward the HER stability of precious metals,transition metals,and metal-free electrocatalysts in the past few *** discusses the challenges in the stability of HER electrocatalysts and the future *** anticipate that it would provide a valuable basis for designing robust HER electrocatalysts.

关键词： electrocatalysis heterogeneous catalysts hydrogen evolution reaction stability water splitting

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High-entropy alloys and compounds for electrocatalytic energy conversion applications

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SusMat 2021年第4期1卷 482-505页

作者： Hang Liu Lenus Syama Like Zhang Carmen Lee Chuntai Liu zhengfei dai Qingyu Yan State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’anChina Xi’an Jiaotong University Suzhou Institute SuzhouChina École Nationale Superieure des Ingenieurs en Arts Chimiques et Technologiques ToulouseFrance School of Materials Science and Engineering Nanyang Technological UniversitySingapore Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhouChina

High-entropy materials,composed of five or more elements in near-equiatomic percentage,have been attracting tremendous interests due to their advantageous properties in a variety of ***,electrocatalysis on high-entropy alloys(HEAs)and high-entropy compounds(HECs)has emerged as a new and promising material owing to the tailored composition and the disordered con-figuration of HEAs and *** extensive efforts have been devoted to investigating the catalytic nature of HEAs and HECs,the details related to the active sites and intrinsic activity of such catalysts still remain uncertain due to the complexity of the multicomponent *** this review,the recent progress of HEAs and HECs is systematically reviewed in terms of their synthetic strate-gies and electrocatalytic ***,the computationally assisted methods(e.g.,density functional theory[DFT])are also presented to discover and design the optimumHEA-andHEC-based ***,the appli-cations of HEAs and HECs in electrocatalytic energy conversion reactions will be discussed,including hydrogen evolution reaction,oxygen evolution reaction,oxygen reduction reaction,carbon dioxide reduction reaction,nitrogen reduction reaction,methanol oxidation reaction,and ethanol oxidation reaction(EOR).Moreover,the prospects and future opportunities for this research field are cau-tiously discussed.A series of upcoming challenges and questions are thoroughly proposed from the experimental and theoretical aspects as well as other future applications in electrocatalysis.

关键词： alloys entropy compounds

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Hydrogenated vanadium oxides as an advanced anode material in lithium ion batteries

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Nano Research 2017年第12期10卷 4266-4273页

作者： Yufei Zhang Huanwen Wang Jun Yang Haosen Fan Yu Zhang zhengfei dai Yun Zheng Wei Huang Xiaochen Dong Qingyu Yan College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 China Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (NanjingTech) Nanjing 210009 China School of Materials Science and Engineering Nanyang Technological University 639798 Singapore

Current research on vanadium oxides in lithium ion batteries （LIBs） considers them as cathode materials, whereas they are rarely studied for use as anodes in LIBs because of their low electrical conductivity and rapid capacity fading. In this work, hydrogenated vanadium oxide nanoneedles were prepared and incorporated into freeze-dried graphene foam. The hydrogenated vanadium oxides show greatly improved charge-transfer kinetics, which lead to excellent electrochemical properties. When tested as anode materials （0.005-3.0 V vs. Li/Li＋） in LIBs, the sample activated at 600℃ exhibits high specific capacity （-941 mA-h-g-1 at 100 mA.g-1） and high-rate capability （-504 mA·h·g-1 at 5 A·g-1）, as well as excellent cycling performance （-285 mA.h.g-1 in the 1,000th cycle at 5A-g-1）. These results demonstrate the promising application of vanadium oxides as anodes in LIBs.

关键词： hydrogenation vanadium oxides 3D structure rechargeable lithium ionbattery (LIB) anode

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Optimizing interfacial electronic coupling with metal oxide to activate inert polyaniline for superior electrocatalytic hydrogen generation

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Carbon Energy 2019年第1期1卷 77-84页

作者： Zhen-Feng Huang Jiajia Song Yonghua Du Shuo Dou Libo Sun Wei Chen Kaidi Yuan zhengfei dai Xin Wang School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingaporeSingapore Singapore-HUJ Alliance for Research and Enterprise NEW-CREATE Phase IICampus for Research Excellence and Technological Enterprise(CREATE)SingaporeSingapore Institute of Chemical and Engineering Sciences A*STARJurong IslandSingapore Department of Chemistry National University of SingaporeSingaporeSingapore School of Materials Science and Engineering Nanyang Technological UniversitySingaporeSingapore

Tuning and optimization of electronic structures and related reaction energetics are critical toward the rational design of efficient ***,experimental and theoretical calculation demonstrate the originally inert N site within polyaniline(PANI)can be activated for hydrogen evolution by proper d-πinterfacial electronic coupling with metal *** a result,the assynthesized WO3 assemblies@PANI via a facile redox-induced assembly and in situ polymerization,exhibits the electrocatalytic production of hydrogen better than other control samples including W18O49@PANI and most of the reported nobel-metal-free electrocatalysts,with low overpotential of 74 mV at 10 mA·cm−2 and small Tafel slope of 46 mV·dec−1 in 0.5M H2SO4(comparable to commercial Pt/C).The general efficacy of this methodology is also validated by extension to other metal oxides such as MoO3 with similar improvements.

关键词： hydrogen evolution interfacial electronic coupling metal oxide N-H bond polyaniline

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Suppression of Sn^(2+) and Lewis acidity in SnS_(2)/black phosphorus heterostructure for ppb-level room temperature NO_(2) gas sensor

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Science Bulletin 2021年第24期66卷 2471-2478,M0003页

作者： Tingting Liang zhengfei dai Yaoda Liu Xu Zhang Haibo Zeng State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China MIIT Key Laboratory of Advanced Display Materials and Devices College of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China MIIT Key Laboratory of Advanced Display Materials and Device

The selective detection of harmful gases is of great significance to human health and air quality,triggering the need for special customizations of sensing material *** this study,we prepared a novel Sn S_(2)/black phosphorus(BP)two-dimensional(2D)-2D heterostructure via the in situ hydrothermal growth of Sn S_(2)nanosheets on exfoliated BP lamellae for NO_(2)sensing *** the Sn S_(2)/BP composite,the holes with high oxidizability in p-type BP could oxidize Sn^(2+)into Sn^(4+),thus inhibiting the formation of Lewis acidic S *** Sn^(2+)/Lewis acidity suppression of the composite was further confirmed by X-ray photoelectron spectroscopy and acidic double-layer capacitance analyses,and promoted the adsorption and detection of acidic NO_(2).Owing to its valence and Lewis acidity engineering,the Sn S_(2)/BP heterostructure sensor could detect trace levels of NO_(2)as low as 100 ppb(parts per billion)with high response,fast response/recovery,good stability,and selectivity at room *** high absorption energy of NO_(2)(à0.74 e V),as indicated by the density functional theory calculations,suggests that NO_(2)was chemically adsorbed on the Sn S_(2)/BP surface,which was also evidenced by the in situ Raman spectroscopy *** work opens up interesting opportunities for the rational design of highly efficient NO_(2)gas sensors through Lewis acidity modification and interface engineering.

关键词： Phosphorene Sn S_(2) Interface engineering Surface Lewis acidity Nitrogen dioxide detection

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Corrosion Resistance of Titanium Bipolar Plate Enhanced by TiN Film

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稀有金属材料与工程 2024年第10期53卷 2755-2765页

作者： Deng Zhenzhen dai zhengfei Wu Weibo Lai Ruisi Feng Qing Jia Bo Wang Chen Lv Yuanjiang Ma Fei State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'an 710049China Xi'an Taijin Industrial Electro-chemical Technology Co. Ltd.Xi'an 710021China

To improve the corrosion resistance of titanium(Ti)bipolar plate,titanium nitride(TiN)film was prepared on the surface of commercial TA1 pure titanium by magnetron reactive sputtering and pulse laser deposition(PLD)techniques,and the film prepared under different process parameters were *** show that dense and complete TiN film can be obtained on TA1 surface under different preparation processes,and the corrosion current density of Ti substrate significantly ***,the composition of the film prepared by magnetron reactive sputtering is affected by the oxygen competition reaction,and its homogeneity is inferior to that of the film prepared by *** comprehensive performance of the PLD-prepared film shows excellent characteristics in the terms of low corrosion current density(0.025μA·cm^(−2)),moderate corrosion overpotential(−0.106 V),and good hydrophobicity.

关键词： proton exchange membrane water electrolyzer bipolar plate process parameter TiN film corrosion resistance

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电镀辅助热等静压扩散连接钨/钢接头的特征

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稀有金属材料与工程 2022年第7期51卷 2393-2399页

作者：马运柱王健宁刘文胜戴正飞蔡青山中南大学轻质高强结构材料国家级重点实验室湖南长沙410083 西安交通大学金属材料强度国家重点实验室陕西西安710049

采用电化学沉积技术在纯钨圆柱表面上电镀了厚度为10μm的Ni镀层,再利用热等静压扩散连接方法制备可应用于核聚变堆部件的钨/钢圆柱体连接试样。热等静压扩散连接工艺参数设定为900℃/100 MPa/1 h。由组织和成分分析可知钨/钢扩散连接... 详细信息

采用电化学沉积技术在纯钨圆柱表面上电镀了厚度为10μm的Ni镀层,再利用热等静压扩散连接方法制备可应用于核聚变堆部件的钨/钢圆柱体连接试样。热等静压扩散连接工艺参数设定为900℃/100 MPa/1 h。由组织和成分分析可知钨/钢扩散连接接头形成了良好的冶金结合,其接头抗拉伸强度约为236 MPa,但由于残余应力集中,钨/钢接头断裂失效发生在靠近连接界面的钨基体内。实验加入Cu作为软质中间层,通过蠕变或者屈服机制释放残余应力,使得钨/钢接头强度提高到312 MPa。同时分析了镀层的结合力和钨/钢连接接头界面的硬度分布。

关键词：钨钢电镀扩散连接热等静压

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