Photodeposition fabrication of hierarchical layered Co-doped Ni oxyhydroxide(NixCo1−xOOH)catalysts with enhanced electrocatalytic performance for oxygen evolution reaction  

作　　者：Liang-ai Huang Zhishun He Jianfeng Guo Shi-en Pei Haibo Shao Jianming Wang 

机构地区：[1]Department of Chemistry,Zhejiang University,Hangzhou,310027,China

出　　处：《Nano Research》2020年第1期246-254,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21373182);the Zhejiang Provincial Natural Science Foundation of China(No.LY17B030004).

摘　　要：Highly active,durable and inexpensive oxygen evolution reaction(OER)catalysts are crucial for achieving practical and high-efficiency water splitting.Herein,hierarchical interconnected NixCo1−xOOH nanosheet arrays supported on TiO2/Ti substrate have been fabricated through a facile photodeposition method.Compared with pristine NiOOH,the obtained NixCo1−xOOH nanosheet arrays possess larger exposed electrochemical active surface area,faster transfer and collection of electrons and stronger electronic interaction,showing a low overpotential of 350 mV at a current density of 10 mA·cm−2 and a small Tafel slope of 41 mV·dec−1 in basic solutions,with the OER performance superior to pristine NiOOH and most Ni-based catalysts.Furthermore,the NixCo1−xOOH electrode demonstrates excellent stability at the current density of 10 mA·cm−2 for 24 hours,which is attributed to the structural maintenance caused by the good adhesion of the catalyst and the substrate.Our study provides an alternative approach for the rational design of highly active and promising OER electrocatalysts.

关 键 词：nickel oxyhydroxide cobalt incorporation PHOTODEPOSITION ELECTROCATALYST oxygen evolution reaction 

分 类 号：O64[理学—物理化学]