Water oxidation can performed with cyclic voltammetry (CV), linear sweep voltammetry (LSV),glassy carbon is consider one of the best electrode as working electrode.
Hi Dr Sumit Meshram . It can be done by photoelectrochemical cell was first reported by Fujishima and Honda (1972) using an electrochemical system consisting of a TiO2 semiconductor electrode connected through an electrical load to a platinum black counter electrode.. See the article: https://www.sciencedirect.com/topics/engineering/water-splitting
Tolod, Kristine Rodulfo, Simelys Hernández, and Nunzio Russo. "Recent advances in the BiVO4 photocatalyst for sun-driven water oxidation: top-performing photoanodes and scale-up challenges." Catalysts 7, no. 1 (2017): 13.
You can perform water oxidation using PEC water splitting and by utilizing a narrow bandgap n-type semiconductor as a photoanode in it. I hope this will help your work. Good luck with your research !!