Application and Development of OER Catalysts in Water Electrolysis for Hydrogen

With the growing global energy crisis and environmental pollution, developing sustainable energy technologies is urgent. Hydrogen, a clean energy source with high energy density and water as its only byproduct, is a promising alternative to fossil fuels. Electrolytic water splitting is a green hydrogen production method, but its efficiency is limited by the slow kinetics of the oxygen evolution reaction (OER). Developing efficient OER catalysts is crucial to improving this process. This article reviews the principles of electrolytic water splitting, in-cluding HER and OER mechanisms, and key evaluation parameters such as overpotential, Tafel slope, EIS, ECSA, and stability. It highlights transition met-al-based catalysts, particularly NiFe LDH, which enhances OER performance through the lattice oxygen mechanism (LOM). Future research should focus on optimizing catalyst design to advance electrolytic water splitting technology.