Electrocatalytic and photocatalytic activity of Pt-TiO2 films on boron-doped diamond substrate

► Pt-TiO2 films were electrodeposited on boron-doped diamond (BDD) electrodes. ► BDD substrate enables more efficient separation of photogenerated charge carriers. ► On TiO2 films, the active surface area of Pt particles is strongly enhanced. ► Pt/TiO2/BDD electrodes show promising photocatalytic activity for CH3OH oxidation.