电化学2022，Vol.28Issue(10)：70-78,9.DOI:10.13208/j.electrochem.2214005
泡沫铜支撑Ru掺杂Cu3P自支撑催化剂及其析氢性能
A Self-Supported Ru-Cu3P Catalyst toward Alkaline Hydrogen Evolution
摘要
Abstract
Transition metal phosphide(TMP)is a kind of effective catalysts toward hydrogen evolution reaction(HER)in alka-line electrolytes.However,the performance of TMP catalysts is strongly limited by water splitting.In this work,we developed a method to prepare a copper foam(CF)supported Ru-doped Cu3P catalyst(Ru-Cu3P/CF)by a consecutive growth of Cu(OH)2 nanoar-rays,soaking in RuC13 solution and phosphorization.A large surface area was obtained by the self-supported catalysts with the appropriative Ru doping.As an excellent HER catalyst,it exhibited a low overpotential of 95.6 mV at a current density of 10 mA·cm-2,which is 149.4 mV lower than that of Cu3P/CF without Ru-doping.The Tafel slope was reduced from 136.6 to 73.6 mA·dec-11 and the rate determining step was changed from Volmer step to Heyrovsky step.The improvement of HER performance might be attributed to the facilitated water splitting step by Ru-doping,which provides more active sites for water splitting.The nanoparticles morphology of Ru-Cu3P derived from the Cu(OH)2 arrays ensured large electrochemical surface areas of the supported electrodes,which could promote the mass and electron transfers,and promote gas production and bubble release.This work highlights the im-portance of the tuning of the water splitting step and surface engineering by the transition metal with emptier d orbitals,which may pave the road for design of high-performance HER electrocatalyst.关键词
电催化/水解离/析氢反应/磷化亚铜/钉掺杂Key words
electrocatalysis/water splitting/hydrogen evolution/copper phosphide/Ru-doping引用本文复制引用
万紫轩,王超辉,康雄武..泡沫铜支撑Ru掺杂Cu3P自支撑催化剂及其析氢性能[J].电化学,2022,28(10):70-78,9.基金项目
This work was supported by the National Natural Science Foundation of China(No.U2032151). （No.U2032151）
