Sequential Electrodeposition of Bifunctional Catalytically Active Structures in MoO₃/Ni–NiO Composite Electrocatalysts for Selective Hydrogen and Oxygen Evolution

-NiO heterostructures significantly reduce the energetic barrier and act as catalytically active centers for selective HER and OER, synergistically accelerating the overall water-splitting process. This work helps to fundamentally understand the heterostructure-dependent mechanism, providing guidance for the rational design and oriented construction of hybrid nanomaterials for diverse catalytic processes.