Sodium Cobalt Metaphosphate as an Efficient Oxygen Evolution Reaction Catalyst in Alkaline Solution

被引：71

作者：

Gond, Ritambhara ^{[1
]}

Singh, Dheeraj Kumar ^{[2
]}

Eswaramoorthy, Muthusamy ^{[2
]}

Barpanda, Prabeer ^{[1
]}

机构：

[1] Indian Inst Sci, Mat Res Ctr, Faraday Mat Lab, CV Raman Ave, Bangalore 560012, Karnataka, India

[2] JNCASR, Chem & Phys Mat Unit, Nanomat & Catalysis Lab, Jakkur PO, Bengaluru 560064, India

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2019年 / 58卷 / 25期

关键词：

cobalt; combustion; electrocatalysis; metaphosphate; oxygen evolution reaction; NICKEL-HYDROXIDE; METAL; WATER; ELECTROCATALYST; PHOSPHATES; OXIDE; IRON; SPECTROSCOPY; PEROVSKITE; CARBON;

D O I：

10.1002/anie.201901813

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Sodium cobalt metaphosphate [NaCo(PO3)(3)] has CoO octahedra (CoO6) and shows superior oxygen evolution reaction (OER) activity in alkaline solution, comparable with the state-of-the-art precious-metal RuO2 catalyst. OER catalysts of this metaphosphate are prepared by combustion (Cb) and solid-state (SS) methods. The combustion-assisted method offers a facile synthesis and one-step carbon composite formation. Unusually high catalytic activity was observed in NCoM-Cb-Ar and could be due to chemical coupling effects between NaCo(PO3)(3) and partially graphitized carbon. This novel electrocatalyst exhibits very small overpotential of 340mV with high mass activity of 532Ag(-1). Good charge transfer abilities and chemical coupling between NaCo(PO3)(3) and amorphous carbon gives the OER activity in NCoM-Cb-Ar.

引用

页码：8330 / 8335

页数：6

共 61 条

[1] Building better batteries [J].