X-ray absorption and diffraction studies of La0.6Ca0.4CoO3 perovskite, a catalyst for bifunctional oxygen electrodes

被引：38

作者：

Haas, O ^{[1
]}

Holzer, F

Müller, S

McBreen, JM

Yang, XQ

Sun, X

Balasubramanian, M

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[2] Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 19期

关键词：

bifunctional oxygen electrodes; zn/air cells; La0.6Ca0.4CoO3; perovskite; in-situ X-ray absorption; X-ray diffraction;

D O I：

10.1016/S0013-4686(02)00241-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The chemical stability of La0.6Ca0.4CoO3 perovskite as an electrocatalyst in bifunctional oxygen electrodes has been studied by exsitu and in-situ X-ray absorption spectroscopy and X-ray diffraction measurements. The catalyst was investigated ex-situ as a powder mixed with BN, and in-situ on carbon supports in bilayer air electrodes at different potentials in an electrochemical cell with an alkaline electrolyte. It was found to be stable for at least 1300 h in electrodes operated under the conditions of rechargeable Zn/air cells. Published by Elsevier Science Ltd.

引用

页码：3211 / 3217

页数：7

共 15 条

[1] Oxygen electroreduction mechanism at thin NixCo3-xO4 spinel films in a double channel electrode flow cell (DCEFC) [J].