PEFC electrocatalysts supported on Nb-SnO2 for MEAs with high activity and durability : Part II. Application of bimetallic Pt-alloy catalysts

Matsumoto, S. and Nagamine, M. and Noda, Z. and Matsuda, J. and Lyth, S. M. and Hayashi, A. and Sasaki, K. (2018) PEFC electrocatalysts supported on Nb-SnO2 for MEAs with high activity and durability : Part II. Application of bimetallic Pt-alloy catalysts. Journal of the Electrochemical Society, 165 (14). F1164-F1175. ISSN 0013-4651 (https://doi.org/10.1149/2.0321814jes)

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Abstract

Bimetallic Pt-alloys supported on niobium-doped tin oxide (Nb-SnO2) with a vapor-grown carbon fiber (VGCF) backbone are presented as electrocatalysts for polymer electrolyte membrane fuel cells (PEFCs). These can simultaneously achieve both high catalytic activity and high cycling durability for the oxygen reduction reaction (ORR). This was confirmed both in half-cell and full-cell membrane electrode assembly (MEA) configuration, using 60,000 start-stop potential cycles and 400,000 load potential cycles. In this study, we focus on alloying Pt with Co or Ni, and the best performance is achieved for Pt3Co/Nb-SnO2/VGCF electrocatalysts. The catalyst particles are selectively decorated on the Nb-SnO2, resulting in improved resistance to carbon corrosion. Pt3Co alloying was verified by FE-SEM and high-resolution STEM-EDS. High initial mass activity of 274 A g−1 at 0.9 VRHE and 1840 A g−1 at 0.85 VRHE was achieved, with enhanced durability compared to conventional Pt/C electrocatalysts.

  • Item type:Article
    ID code:85316
    Dates:
    Date
    Event
    23 October 2018
    Published
    9 October 2018
    Accepted
    13 April 2018
    Submitted
    Notes:Funding Information: Financial support by the Center-of-Innovation (COI) program, JST Japan, is gratefully acknowledged. Publisher Copyright: © The Author(s) 2018. Published by ECS. S. Matsumoto et al 2018 J. Electrochem. Soc. 165 F1164 DOI 10.1149/2.0321814jes
    Subjects:Science > Chemistry
    Department:Faculty of Engineering > Chemical and Process Engineering
    Depositing user: Pure Administrator
    Date deposited:27 Apr 2023 14:08
    Last modified:09 Apr 2024 04:04
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/85316
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