光催化
异质结
硫黄
材料科学
空位缺陷
可见光谱
光化学
电子
基面
壳体(结构)
氢
原子物理学
化学
光电子学
结晶学
催化作用
物理
有机化学
冶金
复合材料
量子力学
生物化学
作者
Jian Zhang,Wei-xian Zhao,Canhui Qian,Yan Cui,Yong-Hua Li,Wei Chen,Li Jin,Huajie Huang,Xing’ao Li,Xinbao Zhu
出处
期刊:Dalton Transactions
[Royal Society of Chemistry]
日期:2023-01-01
卷期号:52 (36): 12899-12908
被引量:2
摘要
Photoinduced electron-separation and -transport processes are two independent crucial factors for determining the efficiency of photocatalytic hydrogen production. Herein, a sulfur vacancy defect-decorated CoSx@In2S3 (CoSx@VS-In2S3) core/shell heterojunction photocatalyst was synthesized via an in situ sulfidation method followed by a liquid-phase corrosion process. Photocatalytic hydrogen evolution experiments showed that the CoSx@VS-In2S3 nanohybrids delivered an attractive photocatalytic activity of 4.136 mmol h-1 g-1 under visible-light irradiation, which was 8.23 times higher than that of the pristine In2S3 samples. As expected, VS could enhance the charge-separation efficiency of In2S3 through rearranging the electrons of the In2S3 basal plane, in addition to improving the electron-transfer efficiency, as visually verified by transient absorption spectroscopy. Mechanism studies based on density functional theory calculations confirmed that the In atoms adjacent to VS played a key role in the translation, rotation, and transformation of electrons for water reduction. This scalable strategy focused on defect engineering paves a new avenue for the design and assembly of 2D core/shell heterostructures for efficient and robust water-splitting photocatalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI