Direct Observation of Oxygen Vacancy Self-Healing on TiO2 Photocatalysts for Solar Water Splitting | |
Department | OSSO国家重点实验室 |
Zhang YJ(张亚军)1; Xu ZF(徐忠菲)2; Li GY(李贵毓)1; Huang XJ(黄晓卷)1; Hao WC(郝维昌)2; Bi YP(毕迎普)1 | |
The second department | 能源与环境纳米催化材料组 |
2019-08-01 | |
Source Publication | Angewandte Chemie International Edition |
Volume | 58Issue:40Pages:14229-14233 |
Abstract | 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. |
Keyword | hydrogen production oxygen vacancy photocatalysis self-healing TiO2 |
MOST Discipline Catalogue | 理学 ; 理学::化学 |
DOI | 10.1002/anie.201907954 |
URL | 查看原文 |
Indexed By | SCI |
If | 12.257 |
Language | 英语 |
Funding Project | 光催化剂原子间光生电荷迁移及化学价键变化研究 ; 半导体光催化反应过程中电荷迁移直接观测研究 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/26075 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Hao WC(郝维昌); Bi YP(毕迎普) |
Affiliation | 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) |
Recommended Citation GB/T 7714 | Zhang YJ,Xu ZF,Li GY,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 | Zhang YJ,Xu ZF,Li GY,Huang XJ,Hao WC,&Bi YP.(2019).Direct Observation of Oxygen Vacancy Self-Healing on TiO2 Photocatalysts for Solar Water Splitting.Angewandte Chemie International Edition,58(40),14229-14233. |
MLA | Zhang YJ,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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anie.201907954.pdf(1508KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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