Preparation of CO-tolerant PtRuNi/C ternary electrocatalyst having a composition gradient shell

Hojin Lee, Sunjin Park, Hansung Kim

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8 Citations (Scopus)


The carbon-supported PtRuNi/C ternary electrocatalyst having a composition gradient shell was developed using the high-temperature heat treatment and polydopamine protective coating techniques. The fabricated catalyst is a CO-tolerant anode catalyst developed for use in polymer electrolyte membrane fuel cells (PEMFCs). Energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy techniques were used to characterize the catalyst. The results revealed that high-temperature heat treatment led to atomic rearrangement in the shell, resulting in increased Pt content on the catalyst surface and an increased ratio of Ru and Ni in order. The Pt and Ru layers effectively prevent Ni leaching in the acidic environment of the PEMFCs. In addition, a protective coating of polydopamine suppresses the sintering of the catalyst particles when the high-temperature treatment technique is used for catalyst fabrication, thereby preventing the decrease of the active surface area of the catalyst. As a result of the change in the electronic structure of Pt induced by the underlying Ru and Ni atoms, the PtRuNi/C catalyst exhibited enhanced CO tolerance compared to the Pt/C and PtRu/C catalysts as proved by the results from the CO stripping voltammetry and PEMFC test.

Original languageEnglish
Article number128792
JournalChemical Engineering Journal
Publication statusPublished - 2021 Jun 15

Bibliographical note

Funding Information:
This work was supported by the Technology Innovation Program ( 20011633 ) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea), and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2019R1A6A1A11055660 ).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering


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