High-entropy alloyed single-atom Pt for methanol oxidation electrocatalysis
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 t...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-61376-y |
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| Summary: | 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. |
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| ISSN: | 2041-1723 |