期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 37, 期 9, 页码 7429-7435出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.02.013
关键词
Cathode electrocatalysts; Alkaline water electrolysers; Zero gap membrane cells; Hydrogen production
资金
- Technology Strategy Board
- Northwestern Polytechnical University at University of Southampton
Selected coatings on nickel or stainless steel micromeshes have been examined as electrocatalysts for hydrogen evolution in conditions mimicking those found in zero gap alkaline water electrolysers. Voltammetry in 4 M NaOH at a temperature of 333 K, shows that Pt, NiMo and RuO2 are the coatings of choice giving a superior performance particularly at higher current densities. NiMo and RuO2 coatings also give stable performance during a 10 day electrolysis in a laboratory, zero gap, alkaline water electrolysis cell with a hydroxide conducting membrane; when combined with a NiFe(OH)(2) coated anode, a current density of 1 A cm(-2) is achieved with a cell voltage of similar to 2.1 V. Pt catalyses H-2 evolution efficiently at short times of electrolysis but cells with a Pt cathode show an increase in cell voltage from 2.05 V to 2.23 V during the first two days of operation. Crown Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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