Enhanced platinum utilization efficiency of polymer-coated carbon black as an electrocatalyst in polymer electrolyte membrane fuel cells

Samindi Madhubha Jayawickrama, Ziyi Han, Shusaku Kido, Naotoshi Nakashima, Tsuyohiko Fujigaya

    研究成果: Contribution to journalArticle査読

    8 被引用数 (Scopus)

    抄録

    The utilization efficiency of platinum (Pt)in polymer electrolyte membrane fuel cells (PEMFCs)needs to be increased to lower the cost of PEMFCs to facilitate their widespread commercialization. Here we developed a novel method to improve the Pt utilization efficiency by coating of polybenzimidazole (PBI)on the surface of the carbon support material; Vulcan. Electrochemical experiments revealed that Pt nanoparticle-loaded PBI-coated Vulcan (denoted as Vulcan/PBI/Pt)electrode possessed a much larger electrochemically active surface area (ECSA)compared with that of Pt nanoparticles directly deposited on Vulcan (Vulcan/Pt). The power density of the cell with Vulcan/PBI/Pt was 1.16 kW g−1, which was ca. 20% higher than that of the control cell using Vulcan/Pt (0.97 kW g−1). We considered that the higher Pt utilization efficiency of Vulcan/PBI/Pt than Vulcan/Pt resulted in such an enhanced ECSA and power density of the PBI-coated system. Two possible reasons were considered for the improvement; namely 1)the polymer layer prevented the loading of Pt nanoparticles into inaccessible micropores of Vulcan and 2)the polymer layer improved the coating homogeneity of Nafion ionomer, and thus improved the proton accessibility for Pt nanoparticles.

    本文言語英語
    ページ(範囲)349-357
    ページ数9
    ジャーナルElectrochimica Acta
    312
    DOI
    出版ステータス出版済み - 7 20 2019

    All Science Journal Classification (ASJC) codes

    • 化学工学(全般)
    • 電気化学

    フィンガープリント

    「Enhanced platinum utilization efficiency of polymer-coated carbon black as an electrocatalyst in polymer electrolyte membrane fuel cells」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル