Direct Visualization of Oxygen Reaction with Paired Hydroxyl on TiO2(110) Surface at 78 K by Atomic Force Microscopy,The Journal of Physical Chemistry C

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Direct Visualization of Oxygen Reaction with Paired Hydroxyl on TiO2(110) Surface at 78 K by Atomic Force Microscopy
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-07-19 , DOI: 10.1021/acs.jpcc.8b06289
Huan Fei Wen ₁ , Quanzhen Zhang ₁ , Yuuki Adachi ₁ , Masato Miyazaki ₁ , Yoshitaka Naitoh ₁ , Yan Jun Li ₁ , Yasuhiro Sugawara ₁

Affiliation

The hydroxyl defects on rutile TiO₂ surface play an important role in surface chemical reactions and understanding the catalytic reactions due to its excess electrons. In this work, the reaction behavior of oxygen molecule with paired hydroxyl defects on a rutile TiO₂(110)-(1 × 1) surface was observed at 78 K with the atomic resolution by atomic force microscopy. The high reactivity of paired OH with O₂ is attributed to the asymmetric spatial distribution of its excess electrons, and the reaction sites occupy a high distribution of excess electrons. The effect of tip to the surface reactions is discussed, and atomic contrast of their reaction product 2OH_t is associated with the tip–sample distance. The present study is expected to provide some insights into catalytic reactions on oxide surface.

中文翻译：

通过原子力显微镜直接观察TiO ₂（110）表面上成对的羟基在TiO ₂（110）上的氧反应的氧反应

金红石TiO ₂表面的羟基缺陷在表面化学反应中起着重要作用，并由于其过量的电子而有助于催化反应。在这项工作中，通过原子力显微镜在78 K下观察到在金红石型TiO ₂（110）-（1×1）表面上具有成对羟基缺陷的氧分子的反应行为。成对的OH与O ₂的高反应性归因于其过量电子的不对称空间分布，并且反应位点占据了过量电子的高分布。讨论了尖端对表面反应的影响，并讨论了其反应产物2OH _t的原子对比与吸头-采样距离相关联。本研究有望为氧化物表面的催化反应提供一些见识。

更新日期：2018-07-20

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