Work

Regulating Photocarrier Dynamics via Constructing 1D CdS/2D Semi‐Metallic MoReS₃ Schottky Junction Boosts Solar‐Driven CO₂ Conversion

Year: 2025

Type: article

Abstract: Heterostructure strategy is promising to overcome the dynamic bottleneck for fast photocarrier recombination competing with sluggish surface redox in photocatalytic CO 2 conversion but remains limitations for sacrificing stronger redox ability. The emerging Schottky junction is expected to conquer these problems, but dynamics mechanism remains unclear. Herein, 2D semi‐metallic MoReS 3 with Janus structure is adopted to in situ construct 1D/2D heterostructure on CdS nanowires. Beneficial from a matchable work function, band structure, and sufficient interfacial electronic coupling, the interfacial electric field (IEF) directing from CdS to MoReS 3 is successfully formed at 1D/2D heterointerface to construct the Schottky junction. In‐depth dynamics analysis demonstrates that IEF facilitates photoinduced excitons dissociating in CdS and drives photoholes to migrate into MoReS 3 , while the Schottky barrier prohibits the photoelectron transfer to MoReS 3 , inducing efficient photocarrier space separation. Superior catalytic activity of MoReS 3 further accelerates photohole consumption kinetics and successfully elongates the lifetime of photoelectrons at CB of CdS with a higher reduction ability to drive CO 2 conversion, synergistically resulting in sharply enhanced photocatalytic CO 2 conversion performance (CO production rate over 7‐times of CdS) with high selectivity (96.4%). This work deeply unravels the advantages and mechanism of Schottky junction to photocarrier dynamics regulation in the photocatalysis field.

Source: Small

DOI: 10.1002/smll.202501984