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Atomic-scale structure of chemically distinct surface oxygens in redox reactions

DOI: 10.1021/jacs.1c07926 DOI Help

Authors: Anusheela Das (Northwestern University) , Haesun Park (Argonne National Laboratory; Chung-Ang University) , Yanna Chen (Northwestern University) , Devika Choudhury (Argonne National Laboratory) , Tien-Lin Lee (Diamond Light Source) , Jeffrey W. Elam (Argonne National Laboratory) , Peter Zapol (Argonne National Laboratory) , Michael J. Bedzyk (Northwestern University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The American Chemical Society

State: Published (Approved)
Published: October 2021
Diamond Proposal Number(s): 15748

Abstract: During redox reactions, oxide-supported catalytic systems undergo structural and chemical changes. Improving subsequent catalytic properties requires an understanding of the atomic-scale structure with chemical state specificity under reaction conditions. For the case of 1/2 monolayer vanadia on α-TiO2(110), we use X-ray standing wave (XSW) excited X-ray photoelectron spectroscopy to follow the redox induced atomic positional and chemical state changes of this interface. While the resulting XSW 3D composite atomic maps include the Ti and O substrate atoms and V surface atoms, our focus in this report is on the previously unseen surface oxygen species with comparison to density functional theory predictions.

Journal Keywords: Redox reactions; DFT calculations; Oxides; Composites; Oxygen

Subject Areas: Chemistry, Physics

Instruments: I09-Surface and Interface Structural Analysis

Added On: 25/10/2021 09:21

Discipline Tags:

Catalysis Physical Chemistry Physics Surfaces Chemistry

Technical Tags:

Diffraction Spectroscopy X-ray Standing Wave (XSW) X-ray Photoelectron Spectroscopy (XPS)