Monitoring chemical processes on the atomic scale in catalysts by operando X-ray absorption spectrometry

Povzetek

X-ray absorption spectroscopy (XAS) is a powerful tool for characterisation of local structure and chemical state of selected elements in different new functional materials and biological or environmental samples. The rapid development of extremely bright synchrotron sources of X-ray and ultraviolet light in recent years has opened new possibilities for research of matter at the atomic or molecular level, indispensable in the development of new functional nanostructured materials with desired properties. The lecture will present the possibilities offered by X-ray absorption spectroscopy with synchrotron light for ex-situ and in-situ or operando characterization of various catalyst materials before, after and during their operation. With the operando XANES and EXAFS methods it is possible to track changes in the valence states and local structures of selected elements in various (photo)catalysts, during chemical reactions under controlled reaction conditions, thus gaining insight into the dynamic functional properties and reaction mechanisms of these materials. New synchrotron light sources also opened the possibility of combining X-ray absorption or emission spectroscopy and microscopy with a resolution of up to a few tens of nanometres, allowing micro-XAS analysis with high spatial resolution.

Ključne besede

XAS;operando XANES;EXAFS;catalysts;

Podatki

Jezik:	Angleški jezik
Leto izida:	2022
Tipologija:	1.10 - Objavljeni povzetek znanstvenega prispevka na konferenci (vabljeno predavanje)
Organizacija:	UNG - Univerza v Novi Gorici
UDK:	53
COBISS:	110131971
Št. ogledov:	623
Št. prenosov:	0
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

URN:	URN:SI:UNG
Vrsta dela (COBISS):	Delo ni kategorizirano
Strani:	1 str.
ID:	15504341