Localized growth of atomic-layer-deposited platinum catalysts on plasma-treated surface of carbon nanotubes

Junmo Koo, Heon Jun Jeong, Wonjoon Choi, Joon Hyung Shim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Platinum–carbon nanotube (CNT) catalysts were evaluated for use as the cathode catalyst in polymer electrolyte membrane fuel cells. Pt catalysts were fabricated by atomic layer deposition (ALD) on bare untreated or O2 plasma treated CNTs. Pt formed as particles that uniformly covered both the bare and plasma-treated CNT supports. The Pt particles on the bare CNTs were relatively small, and the particle size increased with increasing number of ALD cycles. By contrast, Pt formed as sparsely deposited large particles on the plasma-treated CNTs. This morphological difference caused a clear difference in the electrochemical and fuel cell performance. Experiments confirmed that relatively high and stable power production can be obtained using the relatively large Pt catalysts grown on the plasma-treated CNTs. Factors other than electrochemical enhancement by the geometric features were also found to affect the fuel cell performance.

Original languageEnglish
Article number115185
JournalScripta Materialia
Volume226
DOIs
Publication statusPublished - 2023 Mar 15

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government(MSIT) (No. 2020R1A5A1018153 ).

Publisher Copyright:
© 2022

Keywords

  • Atomic layer deposition
  • Catalyst
  • Plasma pretreatment
  • Platinum
  • Polymer electrolyte membrane fuel cell

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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