Effect of Heat Treatment on the Formation of Copper Active Centers Obtained by the Interaction of Copper Chloride with H-Mordenite

Autor:	Lusegen A. Bugaev, G. B. Sukharina, T. I. Kurzina, S. Yu. Kaptelinin, A. M. Ermakova, V. V. Srabionyan, Leon A. Avakyan, V. A. Durymanov
Rok vydání:	2020
Předmět:	Materials science Absorption spectroscopy Extended X-ray absorption fine structure Ion exchange chemistry.chemical_element Condensed Matter Physics Copper XANES Mordenite Electronic Optical and Magnetic Materials chemistry Physical chemistry Copper chloride Zeolite
Zdroj:	Physics of the Solid State. 62:1222-1227
ISSN:	1090-6460 1063-7834
DOI:	10.1134/s1063783420070252
Popis:	The effect of temperature conditions on the formation of copper active sites obtained by solid state ion exchange between copper chloride and H-mordenite zeolite using X-ray absorption spectroscopy in near-threshold (XANES) and extended (EXAFS) spectral regions behind the copper K-edge measured in in-situ conditions of the reaction at temperatures varying from room temperature to 400°C. The analysis of the spectra performed using direct calculations of CuK-XANES and taking into account anharmonic corrections for CuK-EXAFS fitting enables us to establish that there is no ion exchange up to 200°C and copper remains in the CuCl state. An increase in the temperature higher 200°C leads to the incorporation of copper atoms to the zeolite framework.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cb1edaccc01661eac970b89233d5f790 https://doi.org/10.1134/s1063783420070252 Zobrazit plný text záznamu Full text from SpringerLink