Synergetic metal-semiconductor interaction: Single-atomic Pt decorated CdS nano-photocatalyst for highly water-to-hydrogen conversion

被引:33
作者
Hao, Xiao-li [1 ,2 ]
Chu, Xiao-shan [2 ]
Liu, Xiao-yun [2 ]
Li, Wei [2 ]
机构
[1] Shaanxi Univ Technol, Sch Mat Sci & Engn, Natl & Local Joint Engn Lab Slag Comprehens Utiliz, Hanzhong 723000, Shaanxi, Peoples R China
[2] Shaanxi Univ Sci & Technol, Coll Chem & Chem Engn, Shaanxi Key Lab Chem Addit Ind, Xian 710021, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Water-to-hydrogen conversion; Cadmium sulfide; Metallic single-atom; Density functional theory calculations; Photocatalysis; REDUCTION;
D O I
10.1016/j.jcis.2022.04.053
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:160 / 168
页数:9
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