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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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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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