Self-supporting MOF-derived CoNi@C–Au/TiO2 nanotube array Z-scheme heterocatalysts for plasmon-enhanced high-efficiency full water splitting

Abstract

An electrode-supported hetero-nanostructured CoNi@C–Au/TiO₂ catalyst was prepared and used for electrocatalytic full water splitting. Plasmon-enhanced electrocatalytic H₂ and O₂ generation under visible light irradiation (λ > 420 nm) was demonstrated. HER overpotentials of 98 and 445 mV to drive current densities of 1 and 10 mA cm⁻², respectively, were achieved, while the OER photocurrent at 0 V reached 3.4 mA cm⁻² under solar illumination (λ > 420 nm, 100 mW cm⁻²) in a 0.01 M KOH aqueous solution.