Local structure determination of aluminum in Y zeolite: application of low energy X-ray absorption fine structure spectroscopy

Autor:	D.C. Koningsberger, J. T. Miller
Rok vydání:	1994
Předmět:	Electron density Chemistry Analytical chemistry chemistry.chemical_element General Chemistry Scheikunde Catalysis X-ray absorption fine structure Bond length Aluminium Aluminosilicate Spectroscopy Absorption (electromagnetic radiation) Zeolite
Zdroj:	Catalysis letters, 29(1-2), 77. Baltzer
ISSN:	1572-879X 1011-372X 1011-372x
DOI:	10.1007/bf00814254
Popis:	The local Al structure and electronic properties in Na-Y, NH4-Y and H-Y zeolites have been determined by low energy AlXAFS. The Al-O bond distance of 1.700 A in H-Y is longer than that in NH4-Y and Na-Y, 1.636 and 1.620 A, respectively. In addition, the white line intensity of the Alion in H-Y is higher than in NH4-Y and Na-Y, indicating the electron density on the Alion is lower in H-Y than in the other two catalysts. The results of experimental Al-O bond distance and white line intensities are qualitatively in agreement with theoretically calculated Al-O bond distances in aluminosilicate clusters. However, further work is required in order to quantitatively evaluate the near edge structure of the X-ray absorption data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f8ff020a444762abb317d107efe7f9c https://doi.org/10.1007/bf00814254 Zobrazit plný text záznamu Full text from SpringerLink