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

Exploring earth‐abundant and highly efficient electrocatalysts is critical for further development of water electrolyzer systems. Integrating bifunctional catalytically active sites into one multi‐component might greatly improve the overall water‐splitting performance. In this work, amorphous NiO nanosheets coupled with ultrafine Ni and MoO 3 nanoparticles (MoO 3 /Ni–NiO), which contains two heterostructures (i.e., Ni–NiO and MoO 3 –NiO), is...