Photoelectrochemical water vapor splitting using an ionomer-coated rutile TiO2 thin layer on titanium microfiber felt as an oxygen-evolving photoanode

摘要: Photoelectrochemical (PEC) decomposition of water at room temperature and separation hydrogen oxygen has been achieved using a solid-state cell with proton exchange membrane (PEM). The PEM–PEC can use vapor instead liquid aqueous electrolytes for solar production. In this study, we aimed to evaluate the performance thermally oxidized rutile TiO2 layers on titanium microfiber felt photoanodic oxidation in gas phase. We investigated effects perfluorosulfonic acid ionomer coating, wavelength intensity incident UV light, external electric bias photocurrent density photoanodes humidified gaseous condition. gas-phase PEC thin layer electrode was much higher than that anatase nanotube array under 385 nm illumination high irradiance (40 mW cm−2). H2 evolution rate as an oxygen-evolving photoanode 330 μmol h−1 (irradiation area 16 cm2) applied voltage 1.2 V.