Copper (0) Doping Makes Cobalt-Nickel Hydroxide a High-Efficiency Catalyst for Hydrogen Evolution Reaction. Issue 13 (1st January 2018)

• Record Type: Journal Article
• Authors: Bai, Jingjing; Sun, Qiangqiang; Zhou, Meng; Wang, Liyuan; Shen, Yuqian; Ma, Yi; Wang, Zenglin; Zhao, Chuan
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 13(2018)
• Page Start: H866
• Page End: H871
• Publication Date: 2018-01-01
• Subjects: Electrocatalysis -- Cobalt-nickel hydroxide composite -- Electrocatalysts -- Hydrogen evolution reaction; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0881813jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : The improvement catalytic performance of nickel-cobalt-based catalysts for hydrogen evolution reaction (HER) is still challenging. In this work, the three dimensional metallic copper doped amorphous cobalt nickel hydroxide (Cu(0)-CoNi-OH) composite was deposited on nickel foam (NF) via a facile cyclic voltammetry method, and the doping effect of metal Cu on cobalt nickel hydroxide composite in Cu(0)-CoNi-OH for HER was studied systematically. It is found that the optimal as-prepared Cu(0)-CoNi-OH/NF electrode exhibits extraordinarily electrocatalytic activity for HER and it only requires an overpotential of 47 mV to reach a benchmark HER current density of 10 mA cm −2 in 1.0 M KOH. The prepared Cu(0)-CoNi-OH/NF electrode also exhibits extraordinary stability and fast reaction kinetics with a small Tafel slope of 48 mV dec −1 . The excellent activity is attributed to the unique metal/hydroxide interfaces and the increased electrochemical activity surface area after Cu doping.