“…Over the past few years, numerous semiconductor photocatalysts have been developed for photocatalytic H 2 evolution water splitting, such as metal-free compounds (g-C 3 N 4 [11, [88][89][90][91][92][93][94], SiC [78,95,96], and 6,13-pentacenequinone [97]), inorganic solid solutions (Zn x Cd 1−x S [98][99][100][101][102][103], ZnIn 2 S 4 [104][105][106][107][108], Bi 1−x In x TaO 4 [109], HNb x -Ta 1−x WO 6 [59], and Mn x Cd 1−x S [110,111]), oxynitrides (BaTaO 2 N [112], LaTaON 2 , and TaON [113]), sulfides (ZnS [114][115][116][117], NiCo 2 S 4 [118], Cu 2 ZnSnS 4 [119], MoS 2 [120][121][122][123], CuInS 2 [124][125][126][127], and CdS [128][129][130]), selenides (WSe 2 [131], CoSe 2 …”