Nickel–iron hydroxide oxygen evolution electrocatalysts prepared by a simple chemical bath deposition method

The oxygen evolution reaction (OER), which is an important process in water electrolysis, requires a high overpotential. There is a need for cheaper and more efficient catalysts for this process. Ni hydroxide-based OER catalysts are promising, but further research is required. This paper describes the use of a simple chemical bath deposition method for the preparation and characterization of three-dimensional microstructured Ni–Fe hydroxide electrochemical OER catalysts on nickel plates. The influences of the Fe ion content and pH of the chemical bath on the performance of the catalysts are addressed, allowing the preparation of an efficient and highly active catalyst. Thus, this study represents a stepping stone toward further developments in the field of water electrolysis.