An Oxofluoride Catalyst Comprised of Transition Metals and a Metalloid for Application in Water Oxidation
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
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.
cobalt, nickel, oxofluorides, solid solutions, water oxidation catalysts
IdentifiersURN: urn:nbn:se:su:diva-136190DOI: 10.1002/chem.201501452ISI: 000360583000022PubMedID: 26219925OAI: oai:DiVA.org:su-136190DiVA: diva2:1050891