Electrochemical Synthesis of Spinel Type ZnCo2O4 Electrodes for Use as Oxygen Evolution Reaction Catalysts

被引：294

作者：

Kim, Tae Woo ^{[1
]}

Woo, Myong A. ^{[1
]}

Regis, Morrisa ^{[2
]}

Choi, Kyoung-Shin ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA

[2] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2014年 / 5卷 / 13期

基金：

美国国家科学基金会;

关键词：

NEGATIVE-ELECTRODE; COBALT OXIDE; CO3O4; WATER; REDUCTION; GRAPHENE; HYBRID; ANODE;

D O I：

10.1021/jz501077u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new electrochemical synthesis route was developed to prepare spinel-type ZnCo2O4 and Co3O4 as high quality thin film-type electrodes for use as electrocatalysts for oxygen evolution reaction (OER). Whereas Co3O4 contains Co2+ in the tetrahedral sites and Co3+ in the octahedral sites in the spinel structure, ZnCo2O4 contains only Co3+ in the octahedral sites; Co in the tetrahedral sites is replaced by Zn2+. Therefore, by comparing the catalytic properties of ZnCo2O4 and Co3O4 electrodes prepared with comparable surface morphologies and thicknesses, it was possible to examine whether Co2+ in Co3O4 is catalytically active for OER. The electrocatalytic properties of ZnCo2O4 and Co3O4 for OER in both 1 M KOH (pH 13.8) and 0.1 M phosphate buffer (pH 7) solutions were investigated and compared. The results suggest that the Co2+ in Co3O4 is not catalytically critical for OER and ZnCo2O4 can be a more economical and environmentally benign replacement for Co3O4 as an OER catalyst.

引用

页码：2370 / 2374

页数：5

共 26 条

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