Improving Charge Separation in Cu₂O/g-C₃N₄/CoS Photocathodes by a Z-Scheme Heterojunction to Achieve Enhanced Performance and Photostability

A review on the advancements of graphitic carbon nitride-based photoelectrodes for photoelectrochemical water splitting

“…124 The efficiency and stability of the Cu 2 O foam photoelectrode could be enhanced by combining it with g-C 3 N 4 as a protection layer to alleviate the photocorrosion. 287 With the tactical combination of type II band edge heterojunctions and passivation using g-C 3 N 4 , a photocathode (Cu 2 O/g-C 3 N 4 /CoS) with high stability was fabricated by Kunturu et al 291 The enhanced light-to-electricity conversion efficiency of the Cu 2 O/g-C 3 N 4 p–n junction was also utilised to form a triple-layer photocathode Cu 2 O/g-C 3 N 4 /WS 2 . 286 The mixed-phase WS 2 nanosheets obtained via Li intercalation served as an operative hydrogen evolution catalyst along with enacting the function of an electron acceptor to facilitate electron–hole separation.…”

Core–shell Cu@Cu2O nanoparticles embedded in 3D honeycomb-like N-doped graphitic carbon for photocatalytic CO2 reduction

“…In recent years, scientists have developed many methods to improve the photocatalytic performance of catalysts, such as defect engineering, 17,18 structural modication, 19 doping engineering, 20,21 and heterojunction construction. 22 The combination of Cu 2 O and other semiconductors to form a heterostructure is one of the effective ways to improve its catalytic performance. The formation of a heterojunction can shorten the transmission distance of electrons, thereby improving the performance for CO 2 RR photocatalysis.…”

Efficient Charge Transfer in Z‐Scheme g‐C3N4/Cu/MoS2 Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

“…[15] It is worth mentioning that due to the surface plasmon resonance effect of Au, Pt, Cu, and other metals, it can be used as an electronic conductor to participate in the construction of Z-scheme heterojunction. [16][17][18] In the application of photocatalytic hydrogen production, CN must rely on precious metals such as Pt as cocatalyst to play a role, but this requires high cost. It was found that transition metal dichalcogenides such as MoS 2 , CoP, and Ni 2 P were considered as cheap substitutes for noble metal catalysts because Gibbs free energy was close to Pt.…”