Abstract
AbstractWater oxidation is an important half‐reaction to achieve overall water splitting. Therefore, the development of efficient electrocatalysts for water oxidation is an avenue to improve the competence of fuel generation technology. In this study, a crystalline silver‐based film (AgxO), electrodeposited in‐situ on FTO electrodes from a sodium acetate solution containing silver ions at pH ∼6, shows a remarkable improvement in the water oxidation catalysis after heat treatment at moderate temperature (100 °C). The morphology, nature and composition of the thin films were fully characterized by scanning electron microscopy, atomic force microscopy, powder X‐ray diffraction, X‐ray photoelectron and energy dispersive X‐ray spectroscopies. The electrode, annealed at 100 °C, generates a sustain current density ∼2.25 mA•cm–2 for at least 12 h, which is almost two order of magnitude larger than the as‐deposited electrode in a sodium borate buffer solution of pH 9.2.
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