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An Oxofluoride Catalyst Comprised of Transition Metals and a Metalloid for Application in Water Oxidation
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Organic Chemistry.
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2015 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 21, no 37, 12991-12995 p.Article in journal (Refereed) Published
Abstract [en]

The application of the recently discovered oxofluoride solid solution (CoxNi1-x)(3)Sb4O6F6 as a catalyst for water oxidation is demonstrated. The phase exhibits a cubic arrangement of the active metal that forms oxo bridges to the metalloid with possible catalytic participation. The Co3Sb4O6F6 compound proved to be capable of catalyzing 2H(2)OO(2)+4H(+)+4e(-) at 0.33V electrochemical and 0.39V chemical overpotential with a TOF of 4.410(-3), whereas Ni3Sb4O6F6 needs a higher overpotential. Relatively large crystal cubes (0.3-0.5mm) are easily synthesized and readily handled as they demonstrate both chemical resistance to wear after repeated insitu tests under experimental conditions, and have a mechanical hardness of 270V0.1 using Vickers indentation. The combined properties of this compound offer a potential technical advantage for incorporation to a catalytic interface in future sustainable fuel production.

Place, publisher, year, edition, pages
2015. Vol. 21, no 37, 12991-12995 p.
Keyword [en]
cobalt, nickel, oxofluorides, solid solutions, water oxidation catalysts
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-136190DOI: 10.1002/chem.201501452ISI: 000360583000022PubMedID: 26219925OAI: oai:DiVA.org:su-136190DiVA: diva2:1050891
Available from: 2016-11-30 Created: 2016-11-30 Last updated: 2016-11-30Bibliographically approved

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Svengren, HenrikAthanassiadis, IoannisLaine, Tanja M.Johnsson, Mats
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Department of Materials and Environmental Chemistry (MMK)Department of Organic Chemistry
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