Direct Observation of Oxygen Vacancy Self-Healing on TiO2 Photocatalysts for Solar Water Splitting | |
Bi YP(毕迎普)1; Li GY(李贵毓)1; Huang XJ(黄晓卷)1; Hao WC(郝维昌)2; Xu ZF(徐忠菲)2; Zhang YJ(张亚军)1 | |
刊名 | Angewandte Chemie International Edition |
2019-08-01 | |
卷号 | 58期号:40页码:14229-14233 |
关键词 | hydrogen production oxygen vacancy photocatalysis self-healing TiO2 |
DOI | 10.1002/anie.201907954 |
英文摘要 | Oxygen vacancy (Vo) on transition metal oxides plays a crucial role in determining their chemical/physical properties. Conversely, the capability to directly detect the changing process of oxygen vacancies (Vos) will be important to realize their full potentials in the related fields. Herein, with a novel synchronous illumination X-ray photoelectron spectroscopy (SI-XPS) technique, we found that the surface Vos (surf-Vos) exhibit a strong selectivity for binding with the water molecules, and sequentially capture an oxygen atom to achieve the anisotropic self-healing of surface lattice oxygen. After this self-healing process, the survived subsurface Vos (sub-Vos) promote the charge excitation from Ti to O atoms due to the enriched electron located on low-coordinated Ti sites. However, the excessive sub-Vos would block the charge separation and transfer to TiO2 surfaces resulted from the destroyed atomic structures. These findings open a new pathway to explore the dynamic changes of Vos and their roles on catalytic properties, not only in metal oxides, but in crystalline materials more generally. |
URL标识 | 查看原文 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.licp.cn/handle/362003/26075] |
专题 | 兰州化学物理研究所_OSSO国家重点实验室 |
通讯作者 | Bi YP(毕迎普); Hao WC(郝维昌) |
作者单位 | 1.State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, CAS Lanzhou 730000 (P. R. China) 2.Department of Physics, Beihang University Beijing 100191 (P. R. China) |
推荐引用方式 GB/T 7714 | Bi YP,Li GY,Huang XJ,et al. Direct Observation of Oxygen Vacancy Self-Healing on TiO2 Photocatalysts for Solar Water Splitting[J]. Angewandte Chemie International Edition,2019,58(40):14229-14233. |
APA | Bi YP,Li GY,Huang XJ,Hao WC,Xu ZF,&Zhang YJ.(2019).Direct Observation of Oxygen Vacancy Self-Healing on TiO2 Photocatalysts for Solar Water Splitting.Angewandte Chemie International Edition,58(40),14229-14233. |
MLA | Bi YP,et al."Direct Observation of Oxygen Vacancy Self-Healing on TiO2 Photocatalysts for Solar Water Splitting".Angewandte Chemie International Edition 58.40(2019):14229-14233. |
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