Low-cost graphite as durable support for Pt-based cathode electrocatalysts for proton exchange membrane based fuel cells

Muralidhar Chourashiya, Steffen Thrane Vindt, Amado Andrés Velázquez Palenzuela, Christoffer Mølleskov Pedersen, Christian Kallesøe, Shuang Ma Andersen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Proton exchange membrane fuel cell (PEMFC) technology has reached pre-commercial viability, but their insufficient durability acts as a major roadblock in its full-fledged utilization. It has been well established that the issue of durability is majorly due to the corrosion of carbon support used for Pt. Therefore, a search for low-cost and robust alternative support is highly desirable. In this paper, different graphite (and graphene) materials as durable support for Pt-based electrocatalyst are investigated. We followed the top-down approach where a fully graphitized support is mildly wet-milled and surface-treated to give a sufficient surface modification for improved Pt deposition on these supports. All the graphite-supported Pt samples showed better durability than that of state-of-the-art commercial electrocatalysts. Considering both activity and durability the best catalyst among the investigated samples showed a comparable mass specific activity (MSA) of 0.186 A/mg and significantly higher durability (70%) after 7500 stress cycles. For HiSpec9100 and BASF commercial electrocatalysts, the normalized ESA retention value after 7500 stress cycles was 40% and 47%, respectively.

Original languageEnglish
Pages (from-to)23275-23284
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number52
DOIs
StatePublished - 27 Dec 2018
Externally publishedYes

Keywords

  • Accelerated stress test
  • Graphite support
  • PEMFC
  • Supported Pt
  • Wet-ball-milling

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