High-Resolution XAS/XES: Analyzing Electronic Structures of Catalysts

ISBN-13: 9781466592988 / Angielski / Twarda / 2014 / 248 str.

Jacinto Sa

Opis

Photon-in-photon-out core level spectroscopy is an emerging approach to characterize the electronic structure of catalysts and enzymes, and it is either installed or planned for intense synchrotron beam lines and X-ray free electron lasers. This type of spectroscopy requires high-energy resolution spectroscopy not only for the incoming X-ray beam but also, in most applications, for the detection of the outgoing photons. Thus, the use of high-resolution X-ray crystal spectrometers whose resolving power E/E is typically about 10 4, is mandatory. High-Resolution XAS/XES: Analyzing Electronic Structures of Catalysts covers the latest developments in X-ray light sources, detectors, crystal spectrometers, and photon-in-photon-out core level spectroscopy techniques. It also addresses photon-in-photon-out core level spectroscopy applications for the study of catalytic systems, highlighting hard X-ray measurements primarily due to probe high penetration, enabling in situ studies. This first-of-its-kind book:

• Discusses high-resolution X-ray emission spectroscopy (XES) and X-ray absorption spectroscopy (XAS) in terms of time-resolved and surface enhancement
• Supplies an understanding of catalytic reactivity essential for capitalizing on core level X-ray spectroscopy at fourth-generation light sources (XFELs)
• Describes all spectrometers developed to perform core level X-ray spectroscopy, considering the advantages and disadvantages of each
• Details methods to elucidate aspects of catalysts under working conditions, such as active sites and molecule adsorption
• Introduces theoretical calculations of spectra and explores biological as well as heterogeneous catalysts

Complete with guidelines and warnings for the use of this type of spectroscopy, High-Resolution XAS/XES: Analyzing Electronic Structures of Catalysts provides a comprehensive overview of the current state of this exciting field."

Spis treści

X-Ray Sources and Detectors. Crystal Spectrometers. Techniques: RXES, HR-XAS, HEROS, GIXRF, and GEXRF. Theoretical Models. Biological Catalysts. Heterogeneous Catalysts.

O autorze

Jacinto Sá is the Modern Heterogeneous Catalysis Group leader at the Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw. He received his M.Sc from the Universidade de Aveiro, Portugal, and his Ph.D from The University of Aberdeen, Scotland. His work in using accelerator-based light sources to diagnose the mechanisms by which important catalytic processes proceed, and in conventional ultrafast laser sources, make him one of the most experienced researchers in the world in this area. Widely published and respected, Dr. Sá received an R&D 100 Award for his work with the CenTACat Group, Queen’s University Belfast, Northern Ireland.