An Oxofluoride Catalyst Comprised of Transition Metals and a Metalloid for Application in Water Oxidation.
Chemistry
; 21(37): 12991-5, 2015 Sep 07.
Article
em En
| MEDLINE
| ID: mdl-26219925
ABSTRACT
The application of the recently discovered oxofluoride solid solution (Cox Ni1-x )3 Sb4 O6 F6 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 Co3 Sb4 O6 F6 compound proved to be capable of catalyzing 2H2 OâO2 +4H(+) +4e(-) at 0.33â
V electrochemical and ≤0.39â
V chemical overpotential with a TOF of 4.4â
10(-3) , whereas Ni3 Sb4 O6 F6 needs a higher overpotential. Relatively large crystal cubes (0.3-0.5â
mm) are easily synthesized and readily handled as they demonstrate both chemical resistance to wear after repeated inâ
situ tests under experimental conditions, and have a mechanical hardness of 270â
V0.1 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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Chemistry
Ano de publicação:
2015
Tipo de documento:
Article