title: Direct Synthesis of Two Inorganic Catalysts on Carbon Fibres for the Electrocatalytic Oxidation of Water.
abstract: Two electrodes for anodic water oxidation made by direct synthesis of inorganic catalysts onto conductive carbon fibre sheets are evaluated. As catalysts two Co- and Sb-containing phases were tested, that is, Co3Sb4O6F6and the new compound CoSbO4. The compounds express large differences in their morphology: CoSbO4grows as thin needles whereas Co3Sb4O6F6grows as larger facetted crystals. Despite the smaller surface area the latter compound shows a better catalytic performance. When the compound Co3Sb4O6F6was used it gave a low increase of +0.028 mV h-1at an overpotential of η=472 mV after 10 h and a stability of +0.48 mV h-1at an overpotential of η=488 mV after 60 h. The leakages of Co and Sb were negligible and only <0.001 at % Co and approximately 0.02 at % Sb were detected in the electrolyte.
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Henrik
authors.initials: H
authors.lastname: Svengren
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Kjell
authors.initials: K
authors.lastname: Jansson
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Jekabs
authors.initials: J
authors.lastname: Grins
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Wei
authors.initials: W
authors.lastname: Wan
authors.affiliation: MAX IV Laboratory, Lund University, 221 00, Lund, Sweden.|ALS Scandinavia AB, Aurorum 10, 977 75, Luleå, Sweden.
authors.forename: Natallia
authors.initials: N
authors.lastname: Torapava
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, 106 91, Stockholm, Sweden.
authors.forename: Mats
authors.identifier: 0000-0003-4319-1540
authors.initials: M
authors.lastname: Johnsson
keywords: antimony; cobalt; electrochemistry; inorganic catalysts; water oxidation