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Atomically dispersed platinum supported on curved carbon supports for efficient electrocatalytic hydrogen evolution
Univ Sci & Technol China, China.
Univ Sci & Technol China, China.
Univ Sci & Technol China, China.
Univ Sci & Technol China, China.
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2019 (English)In: Nature Energy, ISSN 0028-212X, E-ISSN 2213-0217, Vol. 4, no 6, p. 512-518Article in journal (Refereed) Published
Abstract [en]

Dispersing catalytically active metals as single atoms on supports represents the ultimate in metal utilization efficiency and is increasingly being used as a strategy to design hydrogen evolution reaction (HER) electrocatalysts. Although platinum (Pt) is highly active for HER, given its high cost it is desirable to find ways to improve performance further while minimizing the Pt loading. Here, we use onion-like nanospheres of carbon (OLC) to anchor stable atomically dispersed Pt to act as a catalyst (Pt-1/OLC) for the HER. In acidic media, the performance of the Pt-1/OLC catalyst (0.27 wt% Pt) in terms of a low overpotential (38 mV at 10 mA cm(-2)) and high turnover frequencies (40.78 H-2 s(-1) at 100 mV) is better than that of a graphene-supported single-atom catalyst with a similar Pt loading, and comparable to a commercial Pt/C catalyst with 20 wt% Pt. First-principle calculations suggest that a tip-enhanced local electric field at the Pt site on the curved support promotes the reaction kinetics for hydrogen evolution.

Place, publisher, year, edition, pages
Nature Publishing Group, 2019. Vol. 4, no 6, p. 512-518
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-254514DOI: 10.1038/s41560-019-0402-6ISI: 000471295000018OAI: oai:DiVA.org:kth-254514DiVA, id: diva2:1335137
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QC 20190703

Available from: 2019-07-03 Created: 2019-07-03 Last updated: 2019-07-03Bibliographically approved

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