Water electrolysis, particularly alkaline water electrolysis, is gaining attention for green hydrogen production due to its simplicity and low-cost operation. Anion exchange membrane water electrolyzers are being explored for their higher efficiency and ability to operate at high current densities. Researchers have developed a yttrium-doped NiMo/MoO2 catalyst to enhance the hydrogen evolution reaction (HER) in alkaline conditions. The doping strategy aims to optimize the electronic structure of the catalyst, improving activity and stability at high current densities. The synthesized Y-NiMo/MoO2−x electrocatalyst demonstrated remarkable performance with low overpotentials for various current densities in different electrolyte solutions. Yttrium doping promotes water dissociation and H* adsorption-desorption on the NiMo surface, while oxygen vacancies in MoO2 facilitate *OH mediation and charge transfer. This advancement shows promise for efficient industrial-scale hydrogen production with enhanced performance and stability.