Template-free synthesis of Co3O4 microtubes for enhanced oxygen evolution reaction

To fully exploit the superiority of tubular structures, in this study, we systematically explore optimal preparation conditions for Ni/Co3O4, including cation species and content, additive anion species. Our results reveal that formation an initial cobalt nickel acetate hydroxide prism is key factor directly affects final microtubular structure. Moreover, P subsequently doped into Ni/Co3O4 lattice to increase M3+/M2+ molar ratio (M = Co Ni), promote reaction kinetics, optimize electronic Consequently, oxygen evolution performance P-doped significantly higher than undoped state-of-the-art RuO2 electrocatalyst.