Abstract
The temperature-dependence activity of nickel oxide (NiO) thin films for the oxygen reduction reaction (ORR) in 1 M KOH was investigated using sol–gel and spin coating techniques. The peak current density for the ORR was evaluated between room temperature and 100 °C, showing an increase with temperature. XRD and SEM confirmed the formation of cubic phase NiO and uniform morphology of the thin film, respectively. Cyclic voltammetry was used to evaluate the electrocatalytic performance of the NiO film and its temperature sensitivity. The increased activity was attributed to the increased apparent activation energy of the ORR, which also reflected the semiconducting properties of NiO thin film. The findings provide valuable insights into the electrocatalysis of ORR on NiO, which has potential applications in the development of high-performance cathode catalyst.
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