Visible-light-induced hydrogen evolution reaction with WSxSe2-x

Abstract

WS2 is a promising catalyst for the hydrogen evolution reaction.We have explored photocatalytic properties of ternary sulphoselenides of tungsten (WSxSe2-x) by the dye-sensitized hydrogen evolution. WSxSe2-x solid solutions are found to exhibit high activity reaching 2339 μmol h-1 g-1 for WSSe, which is three times higher than that of WS2 alone (866 μmol h-1 g-1). The turnover frequency is also high (0.7 h-1). Such synergistic effect of selenium substitution in WS2 is noteworthy.