atmosphereat 112◦C (15 min), 150◦C (10 min), 325◦C (10 min), 425◦C (10 min)and 500◦C (30 min). The thickness of the TiO2mesoporous filmwas controlled to around 2.5 m as measured using a profilometer.After cooling down, the as-prepared TiO2/FTO electrode was usedas working electrode for electrochemical deposition of Pt NPs.