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1550543 
Journal Article 
FTIR characterization of Fe(3+)-OH groups in Fe-H-BEA zeolite: Interaction with CO and NO 
Kefirov, R; Ivanova, E; Hadjiivanov, K; Dzwigaj, S; Che, M 
2008 
Yes 
Catalysis Letters
ISSN: 1011-372X
EISSN: 1572-879X 
125 
3-4 
209-214 
WOS:000259412500007 
Fe3+-OH groups of a Fe-H-BEA sample prepared by conventional
ion-exchange method are characterized by an IR band at 3686-3684 cm(-1). They exhibit a weak
acidity: upon low-temperature CO adsorption the O-H stretching modes are blue shifted by 100 cm
(-1) and the respective carbonyl adducts are observed at 2158 cm(-1). The Fe3+-OH groups are
reduced at room temperature by NO to form Fe2+-NO species and NO+ groups in cationic positions.
Desorption of pre-adsorbed NO at temperatures above 373 K regenerates the Fe3+-OH groups. The
relation of the Fe3+-OH species to the so-called alpha-oxygen is discussed. 
adsorption; BEA zeolite; CO; FTIR spectroscopy; NO; iron