A Review of Strategies to Improve the Stability of Carbon-supported PtNi Octahedral for Cathode Electrocatalysts in Polymer Electrolyte Membrane Fuel Cells

In Gyeom Kim, Sung Jong Yoo, Jin Young Kim, Hyun S. Park, So Young Lee, Bora Seo, Kwan Young Lee, Jong Hyun Jang, Hee Young Park

Research output: Contribution to journalReview articlepeer-review

Abstract

Polymer electrolyte membrane fuel cells (PEMFCs) are green energy conversion devices, for which commercial markets have been established, owing to their application in fuel cell vehicles (FCVs). Development of cathode electrocatalysts, replacing commercial Pt/C, plays a crucial role in factors such as cost reduction, high performance, and durability in FCVs. PtNi octahedral catalysts are promising for oxygen reduction reactions owing to their significantly higher mass activity (10– 15 times) than that of Pt/C; however, their application in membrane electrode assemblies (MEAs) is challenged by their low stability. To overcome this durability issue, various approaches, such as third-metal doping, composition control, halide treatment, formation of a Pt layer, annealing treatment, and size control, have been explored and have shown promising improvements in stability in rotating disk electrode (RDE) testing. In this review, we aimed to compare the features of each strategy in terms of enhancing stability by introducing a stability improvement factor for a direct and reasonable comparison. The limitations of each strategy for enhancing stability of PtNi octahedral are also described. This review can serve as a valuable guide for the development of strategies to enhance the durability of octahedral PtNi.

Original languageEnglish
Pages (from-to)96-110
Number of pages15
JournalJournal of Electrochemical Science and Technology
Volume15
Issue number1
DOIs
Publication statusPublished - 2024 Feb 1

Bibliographical note

Publisher Copyright:
© 2024, Korean Electrochemical Society. All rights reserved.

Keywords

  • Improved stability of PtNi octahedral
  • Oxygen reduction reaction
  • Polymer electrolyte membrane fuel cells
  • Pt-based electrocatalysts

ASJC Scopus subject areas

  • Electrochemistry

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