Ahn, Sang Hyun Lee, Byung-Seok Choi, Insoo Yoo, Sung Jong Kim, Hyoung-Juhn Cho, Eunae Henkensmeier, Dirk Nam, Suk Woo Kim, Soo-Kil Jang, Jong Hyun 2024-01-20T09:32:05Z 2024-01-20T09:32:05Z 2021-09-05 2014-07 0926-3373 https://pubs.kist.re.kr/handle/201004/126644 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 mu g(Ni) 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. (c) 2014 Elsevier B.V. All rights reserved. English Elsevier BV Development of a membrane electrode assembly for alkaline water electrolysis by direct electrodeposition of nickel on carbon papers Article 10.1016/j.apcatb.2014.02.021 1 Applied Catalysis B: Environmental, v.154, pp.197 - 205 Applied Catalysis B: Environmental 154 197 205 N scie scopus 000335098800023 2-s2.0-84896299242 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article ANION-EXCHANGE MEMBRANES HYDROGEN EVOLUTION REACTION OXYGEN EVOLUTION PEM ELECTROLYSIS FUEL-CELLS PERFORMANCE ENERGY ELECTROCHEMISTRY ELECTROCATALYSTS TECHNOLOGIES Alkaline water electrolysis Membrane electrode assembly Hydrogen and oxygen evolution reactions Electrodeposited Ni catalyst