Improving the High-Current-Density Performance of PEMFC through Much Enhanced Utilization of Platinum Electrocatalysts on Carbon

Fengjuan Zhu, Liuxuan Luo, Aiming Wu, Chao Wang, Xiaojing Cheng, Shuiyun Shen, Changchun Ke, Hong Yang, Junliang Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

We report an effective approach to the synthesis of high-content and high-dispersion Pt nanoparticles (NPs) on XC-72 carbon black as a cathode electrocatalyst with improved high-current-density performance in proton exchange membrane fuel cells (PEMFCs). While exceptionally high catalytic activity for oxygen reduction reaction (ORR) was reported based on the rotating disk electrode (RDE) technique, such catalysts do not deliver nearly the same level of performance in PEMFC due to the lack of optimized design of catalyst structures on carbon support. We recently developed a synergistic synthesis method to make exceptionally high-content and finely dispersed Pt catalysts, which showed the highest Pt-electroactive surface area and the highest Pt mass activity for ORR among the electrocatalysts tested. More importantly, the membrane electrode assembly (MEA) made with this catalyst showed excellent performance at current densities higher than 1200 mA cm-2 in a hydrogen-air PEMFC measurement. 195Pt NMR was used to analyze the molecular structures of the metal precursors and to understand the mechanisms of the formation of Pt catalysts at high dispersity and uniformity.

Original languageEnglish (US)
Pages (from-to)26076-26083
Number of pages8
JournalACS Applied Materials and Interfaces
Volume12
Issue number23
DOIs
StatePublished - Jun 10 2020

Keywords

  • high-current-density performance
  • oxygen reduction reaction
  • platinum electrocatalysts
  • proton exchange membrane fuel cells
  • synergistic effect

ASJC Scopus subject areas

  • Materials Science(all)

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