Abstract
The influence of iron on nanocasting of cobalt oxide nanowires and the performance of these materials for the oxygen evolution reaction (OER) are investigated. Pristine Co3O4 and mixed cobalt iron ...
Highlights
A global-scale sustainable energy scheme that can maintain the environment is one of the most challenging problems that the society is facing
Many efforts have focused on the further optimization of oxygen evolution reaction (OER) activity of cobalt iron oxide materials, either by tuning the morphology[10,11,18,19] and the defect engineering[20,21] or by doping with other transition metals.[22−28] In particular, Waag et al reported dose-controlled pulse laser fragmentation in liquid to generate structural defects on the surface of CoFe2O4.20 Our previous studies on in situ formation of active cobalt species and KIT-6 silica nanocasted cobalt iron oxide systems showed OER activity could be boosted by a small amount of iron incorporation.[3,26]
A series of cobalt iron oxides nanowires have been synthesized via a nanocasting route by using two-dimensional ordered mesoporous SBA-15 silica as a hard template
Summary
A global-scale sustainable energy scheme that can maintain the environment is one of the most challenging problems that the society is facing. Many efforts have focused on the further optimization of OER activity of cobalt iron oxide materials, either by tuning the morphology[10,11,18,19] and the defect engineering[20,21] or by doping with other transition metals.[22−28] In particular, Waag et al reported dose-controlled pulse laser fragmentation in liquid to generate structural defects on the surface of CoFe2O4.20 Our previous studies on in situ formation of active cobalt species and KIT-6 silica nanocasted cobalt iron oxide systems showed OER activity could be boosted by a small amount of iron incorporation.[3,26] It has been reported that Fe3+ incorporation in cobalt oxide could trigger a spin state change at the neighboring Co3+ and elongation of the Co3+−O bond This transition is believed to lower the energy barrier to form Fe3+(Oh)−O* or the catalytically active Co4+−O2− species.[24,29]. The Cs value for KOH 1 M electrolyte was 0.04 mF.[36]
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