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Ultrasmall Abundant Metal-Based Clusters as Oxygen-Evolving Catalysts
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0001-9239-0541
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2019 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 141, no 1, p. 232-239Article in journal (Refereed) Published
Abstract [en]

The oxygen evolution reaction is a crucial step in water electrolysis to develop clean and renewable energy. Although noble metal-based catalysts have demonstrated high activity for the oxygen evolution reaction, their application is limited by their high cost and low availability. Here we report the use of a molecule-to-cluster strategy for preparing ultrasmall trimetallic clusters by using the polyoxometalate molecule as a precursor. Ultrafine (0.8 nm) transition-metal clusters with controllable chemical composition are obtained. The transition-metal clusters enable highly efficient oxygen evolution through water electrolysis in alkaline media, manifested by an overpotential of 192 mV at 10 mA cm–2, a low Tafel slope of 36 mV dec–1, and long-term stability for 30 h of electrolysis. We note, however, that besides the excellent performance as an oxygen evolution catalyst, our molecule-to-cluster strategy provides a means to achieve well-defined transition-metal clusters in the subnanometer regime, which potentially can have an impact on several other applications.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 141, no 1, p. 232-239
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-155964DOI: 10.1021/jacs.8b09076ISI: 000455561800040PubMedID: 30540181OAI: oai:DiVA.org:umu-155964DiVA, id: diva2:1286785
Funder
Carl Tryggers foundation , CTS-16-161Available from: 2019-02-07 Created: 2019-02-07 Last updated: 2019-02-07Bibliographically approved

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Gracia-Espino, EduardoHu, GuangzhiWågberg, Thomas

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CiteExportLink to record
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