RuO₂ electrodeposited on spherical-TiO₂ nanoparticles-spin-coated ITO substrate by using cyclic voltammetry (CV) was used as the cathode for electrocatalytic reduction of CO₂. The surface morphology of the as-prepared film was characterized by field emission scanning electron microscopy (FE-SEM) and its electrocatalytic performance was assessed by quasi-steady-state potentiodynamics and chronoamperometry (i～t). The results show that the as-prepared RuO₂/TiO₂ nanofilm consists of uniform and compact nanoparticles, exhibiting superior electrocatalytic activity and stability for electrochemical reduction of CO₂ as compared to that prepared by traditional thermal decomposition.

Key words: RuO₂/TiO₂ nanofilms, cyclic voltammetric deposition, electroreduction of CO₂, electrocatalysis