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Ambient-pressure photoelectron spectroscopy for heterogeneous catalysis and electrochemistry

Paper ID Volume ID Publish Year Pages File Format Full-Text
54934 47032 2013 5 PDF Available
Title
Ambient-pressure photoelectron spectroscopy for heterogeneous catalysis and electrochemistry
Abstract

We describe the design and capabilities of a new ambient-pressure X-ray photoelectron spectroscopy system at the Stanford Synchrotron Radiation Lightsource. A unique feature of this system is that samples are illuminated at grazing incidence and with a tightly focused beam, which allows a 50 μm aperture to be placed in the first differential pumping stage of the lens system of the electron spectrometer. The low conductance of the aperture enables surface-sensitive electron spectroscopy of solid surfaces, liquids, and solid–liquid interfaces to be performed operando at pressures as high as 100 Torr. The instrument can also be used to obtain polarization-resolved X-ray absorption spectra using Auger-electron-yield detection. Results for Pt surfaces in ambient-pressure gas environments and for liquid water are presented.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (245 K)Download as PowerPoint slideHighlights► A new APXPS system is in operation at SSRL. ► XPS measurements can be performed in 100 Torr gas ambient. ► Solid–liquid interfaces and liquid surfaces can be investigated. ► Grazing X-ray incidence can be advantageous; the gas phase signal is less pronounced. ► Hydroxyl species on Pt(1 1 1) can be stabilized in ambient conditions.

Keywords
Ambient-pressure XPS; Operando; Heterogeneous catalysis
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Ambient-pressure photoelectron spectroscopy for heterogeneous catalysis and electrochemistry
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 205, 30 April 2013, Pages 101–105
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us