Copper-incorporated hierarchical wire-on-sheet α-Ni(OH)2 nanoarrays as robust trifunctional catalysts for synergistic hydrogen generation and urea oxidation

Copper-incorporated α-Ni(OH)₂ nanoarrays with a unique hierarchical wire-on-sheet structure and local Ni³⁺ species are explored as efficient trifunctional electrocatalysts for urea oxidation and water electrolysis.