Development of a membrane electrode assembly for alkaline water electrolysis by direct electrodeposition of nickel on carbon papers

Title
Development of a membrane electrode assembly for alkaline water electrolysis by direct electrodeposition of nickel on carbon papers
Authors
안상현이병석최인수유성종김형준조은애헨켄스마이어디억남석우김수길장종현
Keywords
Alkaline water electrolysis; Membrane electrode assembly; Hydrogen and oxygen evolution reactions; Electrodeposited Ni catalyst
Issue Date
2014-07
Publisher
Applied catalysis B, Environmental
Citation
VOL 154-155, 197-205
Abstract
A membrane electrode assembly (MEA) for use in an alkaline water electrolyzer is fabricated by sandwiching an anion exchange membrane (AEM) between two electrodes prepared by the electrodeposition of Ni (used as a catalyst) on carbon papers (CPs) acting as gas diffusion layers. The conditions for Ni electrodepositon are determined on the basis of the results of half-cell tests for hydrogen and oxygen evolution reactions. An MEA fabricated by the direct electrodeposition of an extremely low Ni amount of 8.5 μgNi cm−2 exhibits a high cell performance of 150 mA cm−2 at 1.9 V when a 1.0 M KOH solution is supplied to the cathode. Electrodeposited Ni is uniformly distributed on the surface of CP fibers, thereby providing a large electrochemical surface area for gas evolution reactions and thus maintaining high catalyst utilization. It is suggested that control of bubble generation and AEMs with higher ionic conductivity would further increase MEA performance.
URI
http://pubs.kist.re.kr/handle/201004/47362
ISSN
09263373
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KIST Publication > Article
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