NiMoO ₄ @Co ₃ O ₄ Core–Shell Nanorods: In Situ Catalyst Reconstruction toward High Efficiency Oxygen Evolution Reaction

The sluggish kinetics of the oxygen evolution reaction (OER) is bottleneck for practical exploitation water splitting. Here, potential a core–shell structure hydrous NiMoO4 microrods conformally covered by Co3O4 nanoparticles via atomic layer depositions demonstrated. In situ Raman and synchrotron-based photoemission spectroscopy analysis confirms leaching out Mo facilitates catalyst reconstruction, it one centers active sites responsible higher catalytic activity. Post OER characterization indicates that from crystal structure, induces surface to become porous rougher, hence facilitating penetration electrolyte. presence improves onset hydrated due its conductivity, confirmed shift in Fermi level heterostructure. particular NiMoO4@Co3O4 shows record low overpotential 120 mV at current density 10 mA cm?2, sustaining remarkable performance operating constant 10, 50, 100 cm?2 with negligible decay. Presented outcomes can significantly contribute use water-splitting process, offering clear in-depth understanding preparation robust efficient water-splitting.