“…Zn 3 V 2 O 8 and SrTiO 3 14 ), metal sulphides ( i.e. CdS, ZnS, CuS, and CdZnS 15–17 ), perovskites and chalcogenides, 18,19 and metal and non-metal doped catalysts have been employed for water reduction. 20,21 Similarly, graphene and g-C 3 N 4 supported metal or non-metal fabricated catalysts 22–25 have been extensively utilized for H 2 generation.…”