Bimetallic cobalt-nickel coordination polymer electrocatalysts for enhancing oxygen evolution reaction  

作　　者：Lele Lu Qiang Li Jia Du Wei Shi Peng Cheng 

机构地区：[1]Department of Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(MOE),Renewable Energy Conversion and Storage Center(RECAST),College of Chemistry,Nankai University,Tianjin 300071,China

出　　处：《Chinese Chemical Letters》2022年第6期2928-2932,共5页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21622105 and 21931004);the Natural Science Foundation of Tianjin(No.18JCJQJC47200);the Ministry of Education of China(No.B12015)。

摘　　要：Coordination polymers(CPs)have great potential to be used in electrocatalysis owing to their designable compositions and structures.It is highly challenging to apply CPs as electrocatalysts for oxygen evolution reaction(OER)on account of insufficient catalytic efficiency and relatively poor stability of current electrocatalysts.Herein,through a mixed-metal strategy,one-dimensional Co_(x)Ni_(1-x)-HIPA with dual active sites was synthesized and studied for OER electrocatalysts.By changing the metal ratio of CoxNi1-x-HIPA,the OER performance was well regulated.The optimized Co_(1/2)Ni_(1/2)-HIPA exhibited minimum reaction activation energy,and represented an overpotential of 367 m V to reach 10 mA/cm^(2) at 25℃.Moreover,an overpotential of 314 m V at 10 m A/cm^(2) was obtained from Co_(1/2)Ni_(1/2)-HIPA at 55℃.This mixed-metal strategy provides a feasible way for adjusting the electronic states of the electrocatalysts to improve the electrocatalytic OER performance.

关 键 词：Coordination polymer Mixed-metal strategy ELECTROCATALYSIS Oxygen evolution reaction Activation energy 

分 类 号：O631.3[理学—高分子化学] O643.36[理学—化学]