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Instruments / Technical Area	Publication Details	Published	Actions
	Interface sensitivity in electron/ion yield X-ray absorption spectroscopy: The TiO2–H2O interface Matthijs A. Van Spronsen , Xiao Zhao , Maximilian Jaugstetter , Carlos Escudero , Tomas Duchon , Adrian Hunt , Iradwikanari Waluyo , Peidong Yang , Kristina Tschulik , Miquel B. Salmeron The Journal Of Physical Chemistry Letters DOI: 10.1021/acs.jpclett.1c02115 Open Access Show Abstract ▼ Abstract: To understand corrosion, energy storage, (electro)catalysis, etc., obtaining chemical information on the solid–liquid interface is crucial but remains extremely challenging. Here, X-ray absorption spectroscopy (XAS) is used to study the solid–liquid interface between TiO2 and H2O. A thin film (6.7 nm) of TiO2 is deposited on an X-ray-transparent SiNx window, acting as the working electrode in a three-electrode flow cell. The spectra are collected based on the electron emission resulting from the decay of the X-ray-induced core-hole-excited atoms, which we show is sensitive to the solid–liquid interface within a few nm. The drain currents measured at the working and counter electrodes are identical but of opposite sign. With this method, we found that the water layer next to anatase is spectroscopically similar to ice. This result highlights the potential of electron-yield XAS to obtain chemical and structural information with a high sensitivity for the species at the electrode–electrolyte interface.	Oct 2021
	Hydrogen, H2 (g), by near-ambient-pressure soft x-ray synchrotron-radiation photoelectron spectroscopy Christopher R. O'Connor , Jorge Anibal Boscoboinik , Mustafa Karatok , Matthijs A. Van Spronsen Surface Science Spectra 28 DOI: 10.1116/6.0001066 Open Access Show Abstract ▼ Abstract: In this article, we show the survey and H 1s spectra acquired with a photon energy of 400.02 eV and H2(g) electron-energy loss of Ag 3d5/2 spectra with a photon energy of 451.3 eV using high-resolution synchrotron-radiation NAP-XPS.	Jun 2021

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Interface sensitivity in electron/ion yield X-ray absorption spectroscopy: The TiO2–H2O interface

Matthijs A. Van Spronsen , Xiao Zhao , Maximilian Jaugstetter , Carlos Escudero , Tomas Duchon , Adrian Hunt , Iradwikanari Waluyo , Peidong Yang , Kristina Tschulik , Miquel B. Salmeron

The Journal Of Physical Chemistry Letters

DOI: 10.1021/acs.jpclett.1c02115