文献类型：期刊文献

英文题名：Core-shell copper oxide @ nickel/nickel-iron hydroxides nanoarrays enabled efficient bifunctional electrode for overall water splitting

作者：Liu, Yunhua Jin, Zhaoyu Tian, Xianqing Li, Xiaoqing Zhao, Qian Xiao, Dan

第一作者：刘云花;Liu, Yunhua

通信作者：Xiao, D[1]

机构：[1]Sichuan Univ, Sch Chem Engn, Chengdu 610065, Sichuan, Peoples R China;[2]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550000, Guizhou, Peoples R China;[3]Univ Texas Austin, Ctr Electrochem, Dept Chem, Austin, TX 78712 USA;[4]Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610065, Sichuan, Peoples R China;[5]Chengdu Univ, Sch Mech Engn, Chengdu 610106, Sichuan, Peoples R China

第一机构：Sichuan Univ, Sch Chem Engn, Chengdu 610065, Sichuan, Peoples R China

通信机构：corresponding author), Sichuan Univ, Sch Chem Engn, Chengdu 610065, Sichuan, Peoples R China.

年份：2019

卷号：318

起止页码：695-702

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20192607112839);Scopus(收录号：2-s2.0-85067893712);WOS:【SCI-EXPANDED(收录号:WOS:000478969600074)】；

语种：英文

外文关键词：NiFe hydroxides; Core-shell nanowire array; Bifunctional electrocatalyst; Overall water splitting

摘要：The design of efficient and low-cost electrocatalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) remains a significant challenge for the hydrogen production. Herein, CuO nanowires encapsulated by Ni and NiFe hydroxides (CuO@Ni/NiFe hydroxides) in-situ grown on the surface of Cu plate were fabricated via chemical oxidation-calcination process and room-temperature interfacial Galvanic reaction, which were applied to the efficient overall water splitting. Thanks to the improved specific surface area and the conductivity, the optimized core-shell CuO@Ni/NiFe hydroxides nanowire array exhibit impressive OER performance as well as HER activity in 1 M KOH which delivers a current density of 10 mA cm(-2) at an overpotential of 230 mV for OER and 125 mV for HER. Significantly, core-shell CuO@Ni/NiFe hydroxides used as bifunctional catalysts for an overall water splitting can achieve a low onset potential of similar to 1.50 V and a relatively high specific current density of 40 mA cm(-2) at similar to 1.73 V. This feasible strategy provides an accumulative opportunity for fabricating low-cost, effective bifunctional catalysts for overall water splitting. (C) 2019 Elsevier Ltd. All rights reserved.