Iron molybdates as electrocatalysts for O2 evolution reaction in alkaline solutions

被引：55
|
作者：
Singh, R. N. [1 ]
Madhu [1 ]
Awasthi, R. [1 ]
Tiwari, S. K. [2 ]
机构：
[1] Banaras Hindu Univ, Fac Sci, Dept Chem, Varanasi 221005, Uttar Pradesh, India
[2] Natl Met Lab, Jamshedpur 831007, Bihar, India
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 11期
关键词：
Iron molybdates; Oxygen evolution; Mixed oxides; Electrocatalysis; Current density; OXYGEN EVOLUTION; ELECTROCHEMICAL CHARACTERIZATION; WATER ELECTROLYSIS; NI ELECTRODES; SPINEL; BEHAVIOR; SURFACE; OXIDES; CO; PEROVSKITES;
D O I：
10.1016/j.ijhydene.2009.04.006
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：
Iron molybdates with [Mo]/[Fe] ratios 1.0, 1.5 and 3.0 have been prepared by a co-precipitation method and produced in the form of thin films on a Ni support. These oxides follow the monoclinic crystal geometry. The study shows that the new oxide is highly active towards the oxygen evolution reaction in alkaline solutions and that its activity seems to depend upon the molar ratio of Mo and Fe in the oxide. The oxide with [Mo]/[Fe] = 1.0 is observed to exhibit the greatest electrocatalytic activity. The reaction order with respect to OH- concentration has been found to be fractional (0.8-1.6). The Tafel slopes at low potentials were close to 35 mV. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：4693 / 4700
页数：8
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