Electrochemical analysis of perpendicular mesoporous Pt electrode filled with pure water for clarifying the active region in fuel cell catalyst layers

Satoshi Tominaka, Chia Wen Wu, Kazuyuki Kuroda, Tetsuya Osaka

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A perpendicular mesoporous platinum film is used as a model electrode to clarify the effectiveness of catalysts inside agglomerates of fuel cell catalyst layers on the basis of experimental facts. The analysis clarifies that: (i) Pt surface even apart from Nafion ionomer phase can be electrochemically active; (ii) its response is different from that of the surface covered with ionomer; and (iii) ionic resistance in pores filled with pure water is too high (ca. 0.18 MΩ cm) for fuel cell reactions to smoothly occur. We conclude that such catalysts in pores filled with pure water are ineffective for fuel cell reactions due to the high ionic resistance, though their catalytic activity is possibly higher than that of the catalysts covered with Nafion.

Original languageEnglish
Pages (from-to)2236-2240
Number of pages5
JournalJournal of Power Sources
Volume195
Issue number8
DOIs
Publication statusPublished - 2010 Apr 15

Keywords

  • Catalyst layer
  • Catalyst utilization
  • Fuel cell
  • Mesoporous platinum
  • Model electrode

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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