Poly(vinylpyrrolidone)-wrapped carbon nanotube-based fuel cell electrocatalyst shows high durability and performance under non-humidified operation

Zehui Yang, Naotoshi Nakashima

    Research output: Contribution to journalArticlepeer-review

    29 Citations (Scopus)

    Abstract

    Low durability and performance have limited the wide commercialization of high-temperature polymer electrolyte fuel cells (HT-PEFCs). In this study, we used an inexpensive commercially available polymer, poly(vinylpyrrolidone) (PVP), to coat multi-walled carbon nanotubes (MWNTs) and deposited platinum (Pt) on the PVP-wrapped MWNTs in order to fabricate a low-cost and durable fuel cell electrocatalyst. It was found that the synthesized fuel cell electrocatalyst showed high durability and performance under a non-humidified operation at a high temperature (120 °C). The synthesized electrocatalyst lost only ∼40% of the initial electrochemical surface area (ECSA) after 150 000 startup/shutdown cycles (from/to 1.0 to/from 1.5 V vs. RHE). The durability of the electrocatalyst was ∼15 times higher than that of commercial CB/Pt that lost ∼50% of its initial ECSA value after 10 000-potential cycles. Meanwhile, the membrane electrode assembly (MEA) fabricated from the synthesized electrocatalyst showed a high power density (307 mW cm-2) at 120 °C without any extra humidification, which was ∼3.5 times higher than that of the commercial CB/Pt (88 mW cm-2). Such results are of importance in fabricating an actual fuel cell catalyst.

    Original languageEnglish
    Pages (from-to)23316-23322
    Number of pages7
    JournalJournal of Materials Chemistry A
    Volume3
    Issue number46
    DOIs
    Publication statusPublished - 2015

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Renewable Energy, Sustainability and the Environment
    • Materials Science(all)

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