Perfluorosulfonic acid-functionalized Pt/graphene as a high-performance oxygen reduction reaction catalyst for proton exchange membrane fuel cells

Kwan Woo Nam, Jongchan Song, Keun Hwan Oh, Min Ju Choo, Hyun Ah Park, Jung Ki Park, Jang Wook Choi

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Platinum nanoparticles (Pt NPs) on carbon black (CB) have been used as catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells for a while. However, this catalyst has suffered from aggregation and dissolution of Pt NPs as well as CB dissolution. In this study, we resolve those issues by developing perfluorosulfonic acid (PFSA)-functionalized Pt/graphene as a high-performance ORR catalyst. The noncovalently bonded PFSA remarkably decreases the dissolution and aggregation of Pt NPs. Moreover, unlike typical NP functionalization with other capping agents, PFSA is a proton conductor and thus efficiently develops a triple-phase boundary. These advantageous features are reflected in the improved cell performance in electrochemical active surface area, catalytic activity, and long-term durability, compared to those of the commercial Pt/C catalysts and graphene-based catalysts with no such treatment.

Original languageEnglish
Pages (from-to)767-774
Number of pages8
JournalJournal of Solid State Electrochemistry
Volume17
Issue number3
DOIs
StatePublished - Mar 2013

Keywords

  • Durability
  • Graphene sheet
  • Oxygen reduction reaction
  • Perfluorosulfonic acid
  • Proton exchange membrane fuel cell

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