Effect of Pt–Pd/C coupled catalyst loading and polybenzimidazole ionomer binder on oxygen reduction reaction in high-temperature PEMFC

M. S.M. Yusof, A. A. Jalil, A. Ahmad, S. Triwahyono, M. H.D. Othman, T. A.T. Abdullah, M. L. Firmansyah, H. D. Setiabudi, A. Johari, W. Nabgan

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Polybenzimidazole (PBI) was studied as an ionomer binder at varying ratios (1–7) in a 20–40 wt% Pt–Pd/C cathode-coupled catalyst layer for the oxygen reduction reaction (ORR) in a high-temperature proton exchange membrane fuel cell (HT-PEMFC). Catalytic activity was examined by CV and LSV, while the properties of the catalysts were characterized by FESEM-EDX, N2 adsorption–desorption, XRD and FTIR. The results showed that the distribution of metals on the carbon surface, carbon wall thickness and the interaction between ionomer and coupled catalysts affected the ORR performance. The fabricated membrane electrode assembly with 5:95 PBI: 30 wt% Pt–Pd/C catalyst ratio exhibited the best performance and highest durability for HT-PEMFC at 170 °C, yielding a power density of 1.30 Wcm−2 with 0.02 mgPt/cm Pt loading. This performance of ultra-low metal loading of coupled Pt–Pd/C electrocatalyst with PBI binder was comparable to those reported by other studies, highlighting a promising catalyst for fuel cell application.

Original languageEnglish
Pages (from-to)20760-20769
Number of pages10
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusPublished - 2 Aug 2019
Externally publishedYes

Keywords

  • High temperature-PEMFC
  • Oxygen reduction reaction
  • Polybenzimidazole ionomer
  • Pt-Pd/C catalyst

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