Noble Metal-Free Copper Hydroxide as an Active and Robust Electrocatalyst for Water Oxidation at Weakly Basic pH

被引：69

作者：

Cui, Shengsheng ^{[1
]}

Liu, Xiang ^{[1
]}

Sun, Zijun ^{[1
]}

Du, Pingwu ^{[1
]}

机构：

[1] Univ Sci & Technol China, CAS Key Lab Mat Energy Convers, Dept Mat Sci & Engn, iChEM Collaborat Innovat Ctr Chem Energy Mat, 96 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2016年 / 4卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Water oxidation; Electrocatalysis; Copper hydroxide; Catalyst; LAYERED DOUBLE HYDROXIDES; OXYGEN-EVOLVING CATALYST; X-RAY PHOTOELECTRON; EVOLUTION; NICKEL; COBALT; OXIDES; NI; PERFORMANCE; CHEMISTRY;

D O I：

10.1021/acssuschemeng.6b00067

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Copper hydroxide (Cu(OH)(2)) is a quite inexpensive and abundant material, but the literature contains no reports of using it as a stable water oxidation catalyst (WOC). In this study, we report for the first time that Cu(OH)(2) material synthesized from a simple copper salt can be used as a WOC with good activity and stability. Under optimal conditions using Cu(OH)(2) as the electrocatalyst, a catalytic current density of 0.1 mA/cm(2) can be achieved under an applied potential of similar to 1.05 V relative to Ag/AgCl at pH 9.2. The slope of the Tafel plot is 78 mV/dec. The Tafel plot indicates that a current density of similar to 0.1 mA/cm(2) requires an overpotential of 550 mV. The Faradaic efficiency was measured to be similar to 95%. The as-synthesized Cu(OH)(2) material was characterized by X-ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy.

引用

页码：2593 / 2600

页数：8

共 58 条

[11] Catalysts made of earth-abundant elements (Co, Ni, Fe) for water splitting: Recent progress and future challenges [J].