Platinum nanosheets synthesized via topotactic reduction of single-layer platinum oxide nanosheets for electrocatalysis

Daisuke Takimoto (), Shino Toma, Yuya Suda, Tomoki Shirokura, Yuki Tokura, Katsutoshi Fukuda, Masashi Matsumoto, Hideto Imai and Wataru Sugimoto ()
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Daisuke Takimoto: Shinshu University
Shino Toma: University of the Ryukyus
Yuya Suda: Shinshu University
Tomoki Shirokura: Shinshu University
Yuki Tokura: Shinshu University
Katsutoshi Fukuda: Kyoto University
Masashi Matsumoto: NISSAN ARC LTD.
Hideto Imai: NISSAN ARC LTD.
Wataru Sugimoto: Shinshu University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Increasing the performance of Pt-based electrocatalysts for the oxygen reduction reaction (ORR) is essential for the widespread commercialization of polymer electrolyte fuel cells. Here we show the synthesis of double-layer Pt nanosheets with a thickness of 0.5 nm via the topotactic reduction of 0.9 nm-thick single-layer PtOx nanosheets, which are exfoliated from a layered platinic acid (HyPtOx). The ORR activity of the Pt nanosheets is two times greater than that of conventionally used state-of-the-art 3 nm-sized Pt nanoparticles, which is attributed to their large electrochemically active surface area (124 m2 g−1). These Pt nanosheets show excellent potential in reducing the amount of Pt used by enhancing its ORR activity. Our results unveil strategies for designing advanced catalysts that are considerably superior to traditional nanoparticle systems, allowing Pt catalysts to operate at their full potential in areas such as fuel cells, rechargeable metal–air batteries, and fine chemical production.

Date: 2023
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DOI: 10.1038/s41467-022-35616-4

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