title: Cobalt polyoxometalates as heterogeneous water oxidation catalysts.
abstract: An insoluble salt of the water oxidation catalyst [Co9(H2O)6(OH)3(HPO4)2(PW9O34)3](16-) (Co9) has been used to modify amorphous carbon paste electrodes. The catalytic activity of this polyoxometalate is maintained in the solid state. Good catalytic rates are reached at reasonable overpotentials. As a heterogeneous catalyst, Co9 shows a remarkable long-term stability in turnover conditions. The oxygen evolution rate remains constant for hours without the appearance of any sign of fatigue or decomposition in a large pH range, including acidic conditions, where metal oxides are unstable.
authors.affiliation: Institute of Chemical Research of Catalonia (ICIQ), Avenida Països Catalans 16, E-43007 Tarragona, Spain.
authors.forename: Joaquín
authors.initials: J
authors.lastname: Soriano-López
authors.forename: Sara
authors.initials: S
authors.lastname: Goberna-Ferrón
authors.forename: Laura
authors.initials: L
authors.lastname: Vigara
authors.forename: Jorge J
authors.initials: JJ
authors.lastname: Carbó
authors.forename: Josep M
authors.initials: JM
authors.lastname: Poblet
authors.forename: José Ramón
authors.initials: JR
authors.lastname: Galán-Mascarós