Cd Single Atom as an Electron Mediator in an S‐Scheme Heterojunction for Artificial Photosynthesis of H 2 O 2
Year: 2025
Type: article
Abstract: Developing conductor‐mediated S‐scheme heterojunction photocatalysts imitating natural photosynthetic systems emerges as a promising approach to hydrogen peroxide (H 2 O 2 ) production. However, achieving precise coupling between two semiconductors with a charge shuttle and modulating the interfacial interactions still remain a significant bottleneck. Herein, we propose a catalyst architecture with a Cd single atom mediated S‐scheme heterojunction formed by interfacing CdS and TiO 2 nanoparticles. This catalyst exhibits an H 2 O 2 production rate as high as 60.33 µmol g −1 min −1 under UV–vis light irradiation, which is attributed to the efficient charge transport at the interface of CdS and TiO 2 thanks to the Cd single atom mediated S‐scheme. In‐situ X‐ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) spin‐trapping tests confirm the S‐scheme charge transfer route. Femtosecond transient absorption (fs‐TA) spectroscopy and other ex‐situ characterizations further corroborate the efficient charge transport across the catalyst interface. This work offers a new perspective on constructing single atoms mediated heterojunctions to enhance photocatalytic performance.
Source: Advanced Energy Materials
Institutions: City University of Hong Kong, Jilin University, State Key Laboratory of Automotive Simulation and Control, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, State Key Laboratory of Molecular Reaction Dynamics, Jiangsu University, China University of Geosciences
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $5,790
OpenAlex ID: W4407551430