Engineering PtCu Nanoparticles for Highly Efficient Methanol Electro-oxidation Reaction

Abstract

Achieving a highly efficient and durable methanol electro-oxidation catalyst in acid media is critical for the practical utilization of direct methanol fuel cells (DMFCs) at the commercial scale. Herein, we report a facile and effective one-pot strategy for the synthesis of carbon-supported PtCu alloy nanoparticles (PtCu NPs) with a Pt-rich surface, small particle size, and uniform dispersion. The as-prepared PtCu NPs with optimal alloy composition (Pt2Cu) exhibit significantly improved electrochemical methanol oxidation reaction performance in terms of high activity, superior CO tolerance, and remarkable durability in contrast to those of commercial Pt/C catalysts in acid media. Particularly, the Pt2Cu/C catalyst exerts 4.5 times enhancement in the mass activity and a larger If/Ib value compared to commercial Pt/C (Pt/Ccomm). The enhanced catalytic activities can be ascribed to the high utilization of Pt and the high index facets of the surface. Besides, the addition of Cu downshifts the d-band center of Pt, and improves CO tolerance during the methanol oxidation reaction process. This work provides an efficient strategy for designing desired Pt-based alloy for various catalytic reactions.

Article information

Article type
Paper
Submitted
01 Aug 2021
Accepted
31 Aug 2021
First published
31 Aug 2021

Faraday Discuss., 2021, Accepted Manuscript

Engineering PtCu Nanoparticles for Highly Efficient Methanol Electro-oxidation Reaction

P. Yao, J. Cao, M. Ruan, P. Song, X. Gong, C. Han and W. Xu, Faraday Discuss., 2021, Accepted Manuscript , DOI: 10.1039/D1FD00047K

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