Comparison of Cobalt-based Nanoparticles as Electrocatalysts for Water Oxidation

Water oxidation electrocatalysts: The controlled synthesis of ε‐Co, CoO, and Co3O4 nanoparticles with nearly identical particle size and shape allows comparisons of the inherent catalytic properties of these materials in the oxygen evolution reaction (OER). The nanoparticle electrodes exhibit relatively low overpotentials and very similar catalytic activities under basic conditions.