Efficient photocatalytic hydrogen evolution on single-crystalline metal selenide particles with suitable cocatalysts.

ABSTRACT: It is important to improve the apparent quantum yields (AQYs) of narrow bandgap photocatalysts to achieve efficient H₂ production. The present work demonstrates a particulate solid solution of zinc selenide and copper gallium selenide (denoted as ZnSe:CGSe) that evolves H₂ efficiently and is responsive to visible light up to 725 nm. This material was synthesized using a flux-assisted method and was found to comprise single-crystalline tetrahedral particles. The coloading of Ni and Rh, Pt, Pd or Ru as cocatalysts further improved the photocatalytic H₂ evolution rate over this photocatalyst. With the optimal coloading of a Ni-Ru composite cocatalyst, an AQY of 13.7% was obtained at 420 nm during a sacrificial H₂ evolution reaction, representing the

SUBMITTER: Chen S 

PROVIDER: S-EPMC8159321 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature