Effects of Annealing Temperature on the Oxygen Evolution Reaction Activity of Copper-Cobalt Oxide Nanosheets

被引：18

作者：

Kim, Geul Han ^{[1
,2
]}

Park, Yoo Sei ^{[1
,2
]}

Yang, Juchan ^{[1
]}

Jang, Myeong Je ^{[1
]}

Jeong, Jaehoon ^{[1
]}

Lee, Ji-Hoon ^{[1
]}

Park, Han-Saem ^{[3
]}

Park, Yong Ho ^{[2
]}

Choi, Sung Mook ^{[1
]}

Lee, Jooyoung ^{[1
]}

机构：

[1] Korea Inst Mat Sci, Dept Energy & Elect Mat, Surface Mat Div, Chang Won 642831, South Korea

[2] Pusan Natl Univ, Dept Mat Sci & Engn, Busan 46241, South Korea

[3] LG Chem, IT & New Applicat Battery Dev, Daejeon 34112, South Korea

来源：

NANOMATERIALS | 2021年 / 11卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

oxygen evolution reaction; transition metal oxide catalyst; water splitting; electrode materials; non-noble-metal catalysis; electrodeposition; ELECTROCATALYTIC PERFORMANCE; WATER ELECTROLYZER; EFFICIENT; HYDROXIDE; CATALYST; NANOPARTICLES; ELECTRODES; PHOSPHIDE; HYDROGEN;

D O I：

10.3390/nano11030657

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Developing high performance, highly stable, and low-cost electrodes for the oxygen evolution reaction (OER) is challenging in water electrolysis technology. However, Ir- and Ru-based OER catalysts with high OER efficiency are difficult to commercialize as precious metal-based catalysts. Therefore, the study of OER catalysts, which are replaced by non-precious metals and have high activity and stability, are necessary. In this study, a copper-cobalt oxide nanosheet (CCO) electrode was synthesized by the electrodeposition of copper-cobalt hydroxide (CCOH) on Ni foam followed by annealing. The CCOH was annealed at various temperatures, and the structure changed to that of CCO at temperatures above 250 degrees C. In addition, it was observed that the nanosheets agglomerated when annealed at 300 degrees C. The CCO electrode annealed at 250 degrees C had a high surface area and efficient electron conduction pathways as a result of the direct growth on the Ni foam. Thus, the prepared CCO electrode exhibited enhanced OER activity (1.6 V at 261 mA/cm(2)) compared to those of CCOH (1.6 V at 144 mA/cm(2)), Co3O4 (1.6 V at 39 mA/cm(2)), and commercial IrO2 (1.6 V at 14 mA/cm(2)) electrodes. The optimized catalyst also showed high activity and stability under high pH conditions, demonstrating its potential as a low cost, highly efficient OER electrode material.

引用

页码：1 / 11

页数：12

共 53 条

[1] Influence of Temperature and Electrolyte Concentration on the Structure and Catalytic Oxygen Evolution Activity of Nickel-Iron Layered Double Hydroxide [J].