A Li-doped Co3O4 oxygen evolution catalyst for non-precious metal alkaline anion exchange membrane water electrolysers

被引：94

作者：

Wu, Xu ^{[1
]}

Scott, Keith ^{[1
]}

机构：

[1] Newcastle Univ, Sch Chem Engn & Adv Mat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 08期

基金：

英国工程与自然科学研究理事会;

关键词：

Water electrolyser; Alkaline anion exchange membrane; Electrolysis; Hydrogen production; Oxygen evolution reaction; Lithium doped Co3O4; POLYMER ELECTROLYTE; IONOMER BINDER; PERFORMANCE; NANOPARTICLES; HYDROGEN;

D O I：

10.1016/j.ijhydene.2012.12.087

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：

Li-doped Co3O4 (LixCo3-xO4, x = 0, 0.07, 0.21, 0.35, 0.49) spinel powders were prepared with a thermal decomposition method and characterized by XRD, SEM, TEM, and XPS. The LixCo3-xO4 samples were formed as tetragonal powders with a simple spinel structure and with particle sizes about 30-40 nm. All LixCo3-xO4 samples exhibited a 50 mV more negative onset potential for oxygen evolution reaction (OER) than Co3O4. The influence of Li-doping is discussed regarding cation distribution, electronic conductivity and oxygen binding energy. Li0.21Co2.79O4 exhibited the highest OER activity amongst the five samples. A single cell, non-precious metal alkaline anion exchange membrane water electrolysers (AAEMWE) with Li0.21Co2.79O4 anode exhibited a current density of 300 mA cm(-2) at a voltage 2.2 to 2.05 V at temperatures of 20-45 degrees C and the stability was examined with a continuous operation for 10 h at 300 mA cm(-2) and at 30 degrees C. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：3123 / 3129

页数：7

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