A two-dimensional PtS₂/BN heterostructure as an S-scheme photocatalyst with enhanced activity for overall water splitting

Abstract

Photocatalytic hydrogen production from water is a sustainable solution to the environmental pollution and energy crisis. Encouraged by the successful synthesis of PtS2 and BN nanosheets and their suitable band...

Enhancing solar-to-hydrogen efficiency with an S-scheme GaTe/PtS2 van der Waals heterojunction with high light absorption

“…17 Similar studies also include g-C 3 N 4 /ZnO, TiO 2 /h-BN and PtS 2 /BN heterojunctions. 16,18,19 In addition, the existence of S-scheme heterojunctions has been experimentally confirmed. Chen et al constructed a SnS 2 /CdS S-scheme heterojunction via a hydrothermal method, which exhibited high light absorption and hydrogen production efficiency and could be used as a two-dimensional heterojunction photocatalyst.…”

“…η STH = η abs × η cu (16) where the parameters η abs and η cu are used to represent the light absorption efficiency and carrier utilization efficiency, respectively. η abs can be defined as follows:…”

“…As a result, the electrons in the CB region of the RP and the holes in the VB region of the OP are retained to perform photocatalytic reactions and endow the system with stronger redox ability. 16…”

“…As a result, the electrons in the CB region of the RP and the holes in the VB region of the OP are retained to perform photocatalytic reactions and endow the system with stronger redox ability. 16 At present, much progress has been made in theoretical research on S-scheme heterojunction photocatalysts. For example, Zhu et al combined a BiTeCl monolayer with a GeSe monolayer to construct a 2D S-scheme heterojunction and found that it could be a promising photocatalyst for comprehensive water splitting.…”

“…36 Additionally, recent studies have focused on constructing heterojunctions using PtS 2 for photocatalysis, such as PtS 2 /g-C 3 N 4 , PtS2/As, PtS 2 /CdO, PtS 2 / GaSe, and PtS 2 /BN. 16,[37][38][39][40] Hence, the considerable potential of PtS 2 as a photocatalyst for water splitting is reasonable to believe.…”