Charge Behavior of Terminal Hydroxyl on Rutile TiO2(110)

被引：10
|
作者：
Miyazaki, Masato [1 ]
Sugawara, Yasuhiro [1 ]
Li, Yan Jun [1 ]
机构：
[1] Osaka Univ, Grad Sch Engn, Dept Appl Phys, Suita, Osaka 5650871, Japan
来源：
LANGMUIR | 2021年 / 37卷 / 35期
基金：
中国国家自然科学基金; 日本学术振兴会;
关键词：
SOLID-SOLUTION INTERFACE; TIO2; PHOTOCATALYSIS; SURFACE-CHEMISTRY; EXCESS ELECTRONS; OXIDE SURFACE; WATER; ADSORPTION; OXYGEN; IDENTIFICATION; (HYDR)OXIDES;
D O I：
10.1021/acs.langmuir.1c01845
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Titanium dioxide (TiO2) is of considerable interest as a photocatalyst and a catalyst support. Surface hydroxyl groups (OH) are the most common adsorbates on the TiO2 surface and are believed to play crucial roles in their applications. Although the characteristics of bridging hydroxyl (OHbr) have been well understood, the adsorption structure and charged states of terminal hydroxyl (OHt) have not yet been experimentally elucidated at an atomic scale. In this study, we have investigated an isolated OHt on the rutile TiO2(110) surface by atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). We found that OH, is in a negatively charged state. The unique characteristic of OHt is different from that of OHbr and involves the amphoterism and diversity of catalytic reactions of TiO2.
引用
收藏
页码：10588 / 10593
页数：6
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