Self-supporting nanoporous Ni/metallic glass composites with hierarchically porous structure for efficient hydrogen evolution reaction  

作　　者：Jing Wang Li You Zhibin Li Xiongjun Liu Rui Li Qing Du Xianzhen Wang Hui Wang Yuan Wu Suihe Jiang Zhaoping Lu 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,PR China [2]Advanced Manufacturing Technology Research Centre,Department of Industrial and Systems Engineering,The Hong Kong Polytechnic University,Hong Kong,PR China

出　　处：《Journal of Materials Science & Technology》2021年第14期145-150,共6页材料科学技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11790293,51871016,51671018,51671021,and 51961160729);the Funds for Creative Research Groups of China(No.51921001);111 Project(B07003);the Program for Changjiang Scholars and Innovative Research Team in University of China(IRT 14R05);the Fundamental Research Funds for the Central Universities(Nos.FRF-GF-19-011A,FRF-TP-18-004C1,FRF-BD-19-002B,and FRF-TP19-054A2);partially supported by State Key Laboratory for Advanced Metals and Materials(2018Z-19)。

摘　　要：Searching for free-standing and cost-efficient hydrogen evolution reaction(HER)electrocatalysts with high efficiency and excellent durability remains a great challenge for the hydrogen-based energy industry.Here,we report fabrication of a unique hierarchically porous structure,i.e.,nanoporous Ni(NPN)/metallic glass(MG)composite,through surface dealloying of the specially designed Ni_(40)Zr_(40)Ti_(20)MG wire.This porous composite is composed of micrometer slits staggered with nanometer pores,which not only enlarges effective surface areas for the catalytic reaction,but also facilitates the release of H2 gas.As a result,the NPN/MG hybrid electrode exhibited the prominent HER performance with a low overpotential of 78 m V at 10 m A cm^(-2)and Tafel slope of 42.4 m V dec^(-1),along with outstanding stability in alkaline solutions.Outstanding catalytic properties,combining with their free-standing capability and cost efficiency,make the current composite electrode viable for HER applications.

关 键 词：Nanoporous Ni DEALLOYING Metallic glasses precursor Hierarchically porous structure Hydrogen evolution reaction 

分 类 号：TQ426[化学工程] TQ116.2