Platinum nanocluster catalysts supported on Marimo carbonviascalable dry deposition synthesis

Naoyuki Hirata, Yui Katsura, Hiroyuki Gunji, Masahide Tona, Keizo Tsukamoto, Mika Eguchi, Toshihiro Ando, Atsushi Nakajima

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The development of efficient fuel cells greatly promotes reducing the consumption of fossil energy, and it is crucial to enhance the platinum (Pt) catalytic activity by optimizing both the nanoparticle size and support effect. In this study, we generate a smaller and uniform size of naked Pt nanocluster (NC) catalystsviaa dry process in the gas phase, and using the direct powder embedded trapping method, the Pt NCs arespatioselectivelysupported on Marimo carbon (MC) that comprises a high density of carbon nanofilaments. At a minimum Pt loading of 0.05 mgPtcm−2for both the anode and cathode in a single cell configuration, a membrane-electrode assembly (MEA) formed by the dry-deposition Pt-NC(d)/MC exhibits superior power density (rated) of 0.105 gPtkW−1at a current density of 1.2 A cm−2, which is better output power density than the conventional MEA formed by Pt catalystsviaa wet process. The origin of the improved performance is investigated using transmission electron microscopy; dry-deposition Pt catalysts that are monodispersely loaded on the outer surface of MC can facilitate not only the gas reaction but also leaving the generated water. The present results demonstrate that the dry deposition of Pt NCs on MC can be used as a scalable catalyst synthesis method to reduce the Pt loading.

Original languageEnglish
Pages (from-to)39216-39222
Number of pages7
JournalRSC Advances
Volume11
Issue number62
DOIs
Publication statusPublished - 2021 Dec 8

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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