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

Sang Hyun Ahn, Byung Seok Lee, Insoo Choi, Sung Jong Yoo, Hyoung Juhn Kim, EunAe Cho, Dirk Henkensmeier, SukWoo Nam, Soo Kil Kim, Jong Hyun Jang

Research output: Contribution to journalArticle

26 Citations (Scopus)

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 8.5μgNicm-2 exhibits a high cell performance of 150mAcm-2 at 1.9V when a 1.0M 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.

Original languageEnglish
Pages (from-to)197-205
Number of pages9
JournalApplied Catalysis B: Environmental
Volume154-155
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

Fingerprint

alkaline water
Nickel
Electrolysis
Electrodeposition
electrokinesis
nickel
electrode
Carbon
membrane
Membranes
Electrodes
Water
carbon
catalyst
Catalysts
Diffusion in gases
Ionic conductivity
gas
Anions
bubble

Keywords

  • Alkaline water electrolysis
  • Electrodeposited Ni catalyst
  • Hydrogen and oxygen evolution reactions
  • Membrane electrode assembly

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

Cite this

Development of a membrane electrode assembly for alkaline water electrolysis by direct electrodeposition of nickel on carbon papers. / Ahn, Sang Hyun; Lee, Byung Seok; Choi, Insoo; Yoo, Sung Jong; Kim, Hyoung Juhn; Cho, EunAe; Henkensmeier, Dirk; Nam, SukWoo; Kim, Soo Kil; Jang, Jong Hyun.

In: Applied Catalysis B: Environmental, Vol. 154-155, 01.01.2014, p. 197-205.

Research output: Contribution to journalArticle

Ahn, Sang Hyun ; Lee, Byung Seok ; Choi, Insoo ; Yoo, Sung Jong ; Kim, Hyoung Juhn ; Cho, EunAe ; Henkensmeier, Dirk ; Nam, SukWoo ; Kim, Soo Kil ; Jang, Jong Hyun. / Development of a membrane electrode assembly for alkaline water electrolysis by direct electrodeposition of nickel on carbon papers. In: Applied Catalysis B: Environmental. 2014 ; Vol. 154-155. pp. 197-205.
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AU - Cho, EunAe

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