High-entropy alloyed single-atom Pt for methanol oxidation electrocatalysis

Mingda Liu, Zhichao Zhang, Chenyu Li, Sen Jin, Kunlei Zhu, Shoushan Fan, Jia Li () and Kai Liu ()
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Mingda Liu: Tsinghua University
Zhichao Zhang: Tsinghua University
Chenyu Li: Tsinghua University
Sen Jin: Tsinghua University
Kunlei Zhu: Qufu Normal University
Shoushan Fan: Tsinghua University
Jia Li: Tsinghua University
Kai Liu: Tsinghua University

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract The methanol oxidation reaction is the bottleneck for direct methanol fuel cells. Unfortunately, the state-of-the-art Pt-based catalysts suffer heavily from the CO poisoning problem. Isolating Pt atoms in a material can avoid CO poisoning. However, single-atom Pt catalysts alone are inert towards methanol oxidation reaction. Here, we report high-entropy alloyed single-atom Pt catalysts, in which single-atom Pt sites are alloyed with non-noble elements in a high-entropy structure. This catalyst not only possesses active Pt sites but also inherits the ability of single-atom Pt to resist CO poisoning. Consequently, the catalyst shows a notable mass activity of 35.3 A mg−1 at only 2.3 at% Pt and maintains high activity even after operation for 180,000 s. Both experimental and theoretical results reveal that the high-entropy structure induces a synergistic effect, wherein the elements coordinated around single-atom Pt sites effectively remove adsorbed CO from Pt. This mechanism facilitates the key reaction steps of methanol oxidation reaction and avoids CO poisoning. This work presents a high-entropy alloyed single-atom strategy to realize efficient and durable methanol oxidation reaction catalysis with low costs.

Date: 2025
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DOI: 10.1038/s41467-025-61376-y

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