In situ hydrothermal growth of Ni-based hydrogen phosphate polyhedrons on Ni foam for efficient hydrogen evolution reaction  

作　　者：Shisheng Yuan Liyun Wu Renzheng Jiang Shenglin Sun Yingpeng Xie 

机构地区：[1]Key Laboratory on Resources Chemicals and Materials of Ministry of Education,College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang,110142,China [2]Shenyang Key Laboratory of Chemical Pollution Control,Shenyang University of Chemical Technology,Shenyang 110142,China

出　　处：《Resources Chemicals and Materials》2024年第4期270-278,共9页资源化工与材料(英文)

基　　金：financially supported by National Key R&D Program of China(2022YFF0705104);National Natural Science Foundation of China(51402199,U21A20316);Liaoning Revitalization Talents Pro-gram(XLYC2007193);Natural Science Foundation of Liaoning Province(2022-MS-289,2021NLTS1210);Scientific Research Foundation of Education Department of Liaoning Province(LJKZ0457).

摘　　要：Developing a cost-effective and stable electrocatalyst is the key to achieve the large-scale applications of water electrolysis to produce green hydrogen.Herein;an in situ hydrothermal growth strategy was put forward to prepare a novel self-supporting electrode;that is;Ni-based hydrogen phosphate polyhedrons supported on 3D Ni foam.This electrode was composed of crystalline(Ni(H2PO4)2⋅2H2O;Ni(H3P2O7)2⋅2H2O);and amorphous phase in which NiO nanoparticles formed.The amorphous phase connected polyhedrons to the Ni foam substrate;forming multifarious heterogeneous interfaces.Such a structure possessed large number of active sites;favored the fast reaction kinetics and electron transport rate;synergistically resulting in a superior alkaline HER per-formance.In alkaline electrolyte;the electrode only needed a small overpotential of 69 mV to reach the current density of 10 mA cm-2 with a small Tafel slope of 56 mV dec-1;and exhibited a good stability at the current density of 100 mA cm-2 for 50 h.This in situ hydrothermal growth strategy opened up a new route to green synthesis of cost-effective and stable 3D heterostructured self-supporting electrode for water-splitting.

关 键 词：Self-supporting electrode In situ growth HETEROSTRUCTURE PHOSPHATE Hydrogen evolution reaction 

分 类 号：O64[理学—物理化学]