Activating CoOOH Porous Nanosheet Arrays by Partial Iron Substitution for Efficient Oxygen Evolution Reaction

被引：515
作者：
Ye, Sheng-Hua [1 ]
Shi, Zi-Xiao [1 ]
Feng, Jin-Xian [1 ]
Tong, Ye-Xiang [1 ]
Li, Gao-Ren [1 ]
机构：
[1] Sun Yat Sen Univ, MOE Lab Bioinorgan & Synthet Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, Sch Chem, Guangzhou 510275, Guangdong, Peoples R China
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2018年 / 57卷 / 10期
关键词：
CoOOH; electrocatalysis; iron; nanosheets; oxygen evolution reaction; WATER OXIDATION; HYDROGEN EVOLUTION; TRANSITION-METALS; COBALT HYDROXIDE; NICKEL SULFIDE; FE-SITES; LOW-COST; ELECTROCATALYSTS; OXYHYDROXIDE; (OXY)HYDROXIDE;
D O I：
10.1002/anie.201712549
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Iron-substituted CoOOH porous nanosheet arrays grown on carbon fiber cloth (denoted as FexCo1-xOOH PNSAs/CFC, 0x0.33) with 3D hierarchical structures are synthesized by insitu anodic oxidation of -Co(OH)(2) NSAs/CFC in solution of 0.01m (NH4)(2)Fe(SO4)(2). X-ray absorption fine spectra (XAFS) demonstrate that CoO6 octahedral structure in CoOOH can be partially substituted by FeO6 octahedrons during the transformation from -Co(OH)(2) to FexCo1-xOOH, and this is confirmed for the first time in this study. The content of Fe in FexCo1-xOOH, no more than 1/3 of Co, can be controlled by adjusting the insitu anodic oxidation time. Fe0.33Co0.67OOH PNSAs/CFC shows superior OER electrocatalytic performance, with a low overpotential of 266mV at 10mAcm(-2), small Tafel slope of 30mVdec(-1), and high durability.
引用
收藏
页码：2672 / 2676
页数：5
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