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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...
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