The electrolyte was purged with oxygen or nitrogen for 15 min prior to any electrochemical measurements. In order to evaluate the electrochemical stability and performance of Pt/TiO2/FTO electrodes, cyclic voltammetry was carried out for 1000 cycles in 0.5 M H2SO4 at the scan rateof 100 mV s−1in the range of -0.295 V to 1.155 V. The catalyst stability was assessed by monitoring the ECSA of Pt in the 1st, 200th,400th, 600th, and 800 th cycles.