A hygroscopic nano-membrane coating achieves efficient vapor-fed photocatalytic water splitting.

ABSTRACT: Efficient water vapor splitting opens a new strategy to develop scalable and corrosion-free solar-energy-harvesting systems. This study demonstrates highly efficient overall water splitting under vapor feeding using Al-doped SrTiO₃ (SrTiO₃:Al)-based photocatalyst decorated homogeneously with nano-membrane TiO_x or TaO_x thin layers (<3 nm). Here, we show the hygroscopic nature of the metal (hydr)oxide layer provides liquid water reaction environment under vapor, thus achieving an AQY of 54 ± 4%, which is comparable to a liquid reaction. TiO_x coated, CoOOH/Rh loaded SrTiO₃:Al photocatalyst works for over 100 h, under high pressure (0.3 MPa), and with no problems using simulated seawater as the water vapor supply source. This va

SUBMITTER: Suguro T 

PROVIDER: S-EPMC9519874 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature