Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 621, Issue -, Pages 160-168Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.04.053
Keywords
Water-to-hydrogen conversion; Cadmium sulfide; Metallic single-atom; Density functional theory calculations; Photocatalysis
Categories
Funding
- National Natural Science Foundation of China [21806098, 21905164]
- Open Research Fund of Shaanxi University of Technology Key Scientific Research Institutions [SLGPT2019KF01-02]
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Solar driven water-to-hydrogen conversion is a promising technology. Researchers achieved high photocatalytic HER activity by decorating single-atomic Pt on the surface of CdS nanoparticles, which promoted the migration of photo-carriers.
Solar driven water-to-hydrogen conversion is a promising technology for the typical sustainable production mode, so increasing efforts are being devoted to exploit high-performance photocatalytic materials. Cadmium sulfide (CdS) is widely used to prepare highly active photocatalysts owing to its merits of broadband-light harvesting and feasible band structure. However, the slow photo-carriers' migration in CdS body structure generally results in high-frequency carriers recombination, which leads to unsatisfied photoactivity. Metallic single-atom surface decoration is an effective method to build the strong metal-support interaction for promotion of photo-carriers' migration. Herein, a simple light-induced reduction procedure was proposed to decorate single-atomic Pt on the surface of CdS nanoparticles for highly photocatalytic HER activity. Research showed that the synergetic metal (Pt)-semiconductor (CdS) interaction significantly promoted the body-to-surface (BTS) photo-carriers' migration of CdS, thereby the high light-to-fuel conversion efficiency (AQY500nm = 25.70%) and 13.5-fold greater simulated sunlight driven HER rate of bare CdS was achieved by this CdS-Pt nano-photocatalyst. Based on the photo-electrochemical analysis and density functional theory calculations, the remarkably improved HER photoactivity can be attributed to the enhanced light-harvesting, promoted BTS electron migration and reduced reaction energy barriers. This study provides a facile procedure to obtain CdS based photo catalyst with metallic single-atom sites for high-performance HER photocatalysis. (C) 2022 Elsevier Inc. All rights reserved.
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