Characterization of basicity in alkaline cation faujasite zeolites - An XPS study using pyrrole as a probe molecule

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90160-J· OSTI ID:7142233

Huang, M; Adnot, A; Kaliaguine, S ^[1]

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1. Univ. Laval, Quebec (Canada)

An X-ray photoelectron spectroscopic method is proposed for the characterization of Lewis basic sites in alkali-cation faujasite zeolites. The method consists of deconvoluting the N{sub 1s} XPS line of chemisorbed pyrrole and measuring the relative intensities of the peak components. It was found that whenever the zeolite sample contains two kinds of alkali cation, two different deconvoluted N{sub 1s} peaks corresponding to pyrrole chemisorbed on these two sites being the framework oxygens adjacent to the alkali cations in faujasite zeolites. The stronger the basic site, the lower the N{sub 1s} binding energy level of the corresponding peak component is. An N{sub 1s} peak corresponding to polymerized pyrrole species was also detected in the cases of LiY and NaY zeolites.

• OSTI ID: 7142233
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 137:2; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AZOLES
BINDING ENERGY
CHEMICAL REACTIONS
CHEMISORPTION
COMPARATIVE EVALUATIONS
ELECTRON SPECTROSCOPY
ENERGY
EVALUATION
FAUJASITE
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INORGANIC ACIDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LEWIS ACIDS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PH VALUE
PHOTOELECTRON SPECTROSCOPY
PYRROLES
SEPARATION PROCESSES
SILICATE MINERALS
SORPTION
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
X-RAY SPECTROSCOPY
ZEOLITES