This review article provides a comprehensive analysis of the use of cobalt hydroxide and its derivatives as catalysts in the oxygen evolution reaction (OER), which is a crucial step in the water-splitting process for hydrogen production. The article covers the various synthetic methods used to prepare cobalt hydroxide and its derivatives, as well as their characterization techniques. The article also discusses the effect of different synthesis parameters on the performance of these materials as OER catalysts. The article goes on to evaluate the performance of cobalt hydroxide and its derivatives under various OER conditions, such as pH, temperature, and applied potential. The article also discusses the advantages and limitations of using these materials as OER catalysts, such as their stability, activity, and cost-effectiveness. The article compares the performance of cobalt hydroxide and its derivatives to other commonly used OER catalysts, such as iridium and ruthenium oxides.