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Bridging Hydroxyls on Anatase TiO 2 (101) by Water Dissociation in Oxygen Vacancies

DOI: 10.1021/acs.jpcb.7b06955 DOI Help

Authors: Immad M. Nadeem (University College London; Diamond Light Source) , George T. Harrison (University College London) , Axel Wilson (Diamond Light Source) , Chi L. Pang (University College London) , Jorg Zegenhagen (Diamond Light Source) , Geoff Thornton (University College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: The Journal Of Physical Chemistry B

State: Published (Approved)
Published: October 2017

Open Access Open Access

Abstract: Titanium dioxide is a promising candidate for photocatalytic H2 fuel production, and understanding water splitting on TiO2 surfaces is vital toward explaining and improving the generation of H2. In this work, we electron irradiate anatase TiO2(101) at room temperature to create metastable surface oxygen vacancies in order to investigate their ability to dissociate H2O. Our scanning tunneling microscopy investigations suggest that the surface oxygen vacancies can dissociate H2O by forming bridging OH species. This claim is supported by theoretical calculations from the literature and our previously published spectroscopic measurements.

Subject Areas: Chemistry, Energy


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Documents:
acs.j332pcb.pdf