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CO2-driven Oxygen Vacancy Diffusion and Healing on TiO2(110) at Ambient Pressure.

Angew Chem Int Ed Engl

January 2025

KAIST - Korea Advanced Institute of Science and Technology, Department of Chemistry, Center for Nanomaterials and Chemical Reaction, IBS, 373-1, Guseong Dong, Yuseong Gu, 305-701, Daejeon, KOREA, REPUBLIC OF.

Understanding how TiO2 interacts with CO2 at the molecular level is crucial in the CO2 reduction toward value-added energy sources. Here, we report in-situ observations of the CO2 activation process on the reduced TiO2(110) surface at room temperature using ambient pressure scanning tunneling microscopy. We found that oxygen vacancies (Vo) diffuse dynamically along the bridging oxygen (Obr) rows of the TiO2(110) surface under ambient CO2(g) environments.

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