Enhanced photocatalytic H2 evolution on CdS with cobalt polyoxotungstosilic and MoS2/graphene as noble-metal-free dual co-catalysts

Abstract

An efficient photocatalyst was designed through dual modification of CdS by cobalt polyoxotungstosilic (SiW₁₁Co) and MoS₂/graphene (M/G). The activity of CdS is increased up to 21.3 times with 1 wt% SiW₁₁Co and 5 wt% M/G loaded. In the absence of noble metals, the as-prepared sample reached a H₂ evolution rate of 1.7 mmol h⁻¹.