Suppression of Pt Nanocluster Aggregation and Enhanced Oxygen Reduction Activity by Heteroatom Doping of Carbon Nanotubes

Increasing the performance of platinum (Pt) catalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells could reduce the amount of this expensive metal that is required. Pt nanoclusters (NCs) can provide substantially increased ORR activity per unit mass of Pt and so...

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Bibliographic Details
Published in:ACS applied energy materials 2024-11, Vol.7 (22), p.10317-10325
Main Authors: Haque, Md. Ahsanul, Kurosaki, Ryuki, Oiwa, Kazutaka, Ikeda, Kaoru, Sato, Kotaro, Nishi, Naoki, Tachibana, Haruna, Kawawaki, Tokuhisa, Negishi, Yuichi
Format: Article
Language:English
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Summary:Increasing the performance of platinum (Pt) catalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells could reduce the amount of this expensive metal that is required. Pt nanoclusters (NCs) can provide substantially increased ORR activity per unit mass of Pt and so are of interest. However, there has been no research regarding supports for Pt NCs exhibiting both high specific surface area and high conductivity. The present work improved the ORR activity and durability of carbon nanotubes by doping with nitrogen or sulfur to reduce the level of aggregation of supported Pt NCs. Pt NCs supported on sulfur-doped carbon nanotubes showed 2.32 times higher activity (425.2 A/gPt) and greater durability compared with those of commercially supported Pt nanoparticle catalysts.
ISSN:2574-0962
2574-0962
DOI:10.1021/acsaem.4c01742