Anion exchange membrane water electrolyzer with an ultra-low loading of Pt-decorated Ni electrocatalyst

Sang Hyun Ahn, Sung Jong Yoo, Hyoung Juhn Kim, Dirk Henkensmeier, SukWoo Nam, Soo Kil Kim, Jong Hyun Jang

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The particle-type electrodes with ultra-low electrocatalyst loading (<10μgcm<sup>-2</sup>) were developed as cathodes in the anion exchange membrane water electrolyzer (AEMWE). The Pt-decorated Ni electrocatalysts were prepared on the surface of carbon paper by Ni electrodeposition and subsequent displacement of Ni by Pt; the composition and morphology were controlled by varying HCl concentration. In half cell test, the increase of hydrogen evolution reaction (HER) activity by Pt decoration was confirmed for Pt-Ni/CP-2 that has Pt ratio of 39.4% (1.85μg<inf>Pt</inf>cm<sup>-2</sup>). A membrane electrode assembly employing Pt-Ni/CP-2 as the HER electrode (total catalyst loading: 13.2μgcm<sup>-2</sup>) exhibited a current density of 250mAcm<sup>-2</sup> at 1.9V<inf>cell</inf> (50°C), which is comparable to the previous reports with much larger loading of 3.1~80mgcm<sup>-2</sup>.

Original languageEnglish
Pages (from-to)674-679
Number of pages6
JournalApplied Catalysis B: Environmental
Volume180
DOIs
Publication statusPublished - 2016

Keywords

  • Anion exchange membrane water electrolyzer
  • Hydrogen evolution reaction
  • Pt-decorated Ni electrocatalyst
  • Ultra-low Pt loading

ASJC Scopus subject areas

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

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