X-ray photoelectron spectroscopy studies on ethylene oxychlorination catalysts

X - Ray Photoelectron Spectroscopy of Silicate Glasses

X-ray photoelectron spectroscopy (XPS) is a powerful technique capable of providing unique information about the structural chemistry of glasses. However, inappropriate procedures for the preparation of sample surfaces or the lack of reliable methods to overcome electrostatic charging effects during analysis of dielectric materials can cause spurious features to be introduced or intrinsic featu...

High-pressure X-ray photoelectron spectroscopy on palladium model hydrogenation catalysts Part2: Hydrogenation of trans-2-pentene on palladium

We have performed the first “high-pressure” XPS study on the palladium, hydrogen and olefin (trans-2-pentene) system in order to gain a better insight into the hydrogenation reaction. We report here data collected using a Pd(111) single crystal and a polycrystalline foil. Hydrogenation was observed on polycrystalline foil (RT and 373 K), but not on Pd(111) single crystal, revealed by on-line ma...

High-pressure X-ray photoelectron spectroscopy on palladium model hydrogenation catalysts Part1: Effect of gas ambient and temperature

In light of accumulating evidences highlighting the major role of operational conditions (gas composition, pressure, temperature) on the surface/bulk structure of catalytic materials, their characterization should involve more and more in-situ methods. We constructed a synchrotronbased high-pressure XPS (X-ray photoelectron spectroscopic) instrument, allowing us to investigate the surface and n...

Ultra Soft X-ray Absorption Spectroscopy and Photoelectron Spectroscopy Studies on Related Materials and Cathodes of Lithium Ion batteries

For analysis of lithium ion batteries, the ultra soft X-ray absorption spectroscopy beamline BL-2 at SR center of Ritsumeikan University has been improving: adding the new grating (900 l/mm) to the monochromator for higher energy up to 1000eV, and constructing the XAFS-PES (photoelectron spectroscopy) chamber equipped with in-situ transfer vessel systems. To elucidate the performance of this be...

Surface and core hole effects in X-ray photoelectron spectroscopy