Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 17, Issue 3, Pages 767-774Publisher
SPRINGER
DOI: 10.1007/s10008-012-1879-0
Keywords
Proton exchange membrane fuel cell; Graphene sheet; Perfluorosulfonic acid; Oxygen reduction reaction; Durability
Categories
Funding
- National Research Foundation of Korea
- Korean Government (Ministry of Education and Science and Technology (MEST)) [NRF-2009-0094219, NRF-2010-0029031, NRF-2012-R1A2A1A01011970]
- Korea Science and Engineering Foundation (KOSEF) [31-2008-000-10055-0]
- MEST
- National Research Foundation of Korea [2012M1A2A2671812, R31-2012-000-10055-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.
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