Understanding deNOx mechanisms in transition metal exchanged zeolites

Transition-metal-containing zeolites have wide-ranging applications in several catalytic processes including the selective catalytic reduction (SCR) of NOx species. To understand how transition metal ions (TMIs) can effect NOx reduction chemistry, both structural and mechanistic aspects at the atomi...

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Bibliographic Details
Published in:Chemical Society reviews 2024-11, Vol.53 (23), p.11657-11691
Main Authors: Jamal Abdul Nasir, Beale, Andrew M, Catlow, C Richard A
Format: Article
Language:English
Subjects:
Ammonia
Catalytic activity
Chemical reduction
Coordination
Selective catalytic reduction
Transition metals
Zeolites
Online Access:Get full text
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Summary:Transition-metal-containing zeolites have wide-ranging applications in several catalytic processes including the selective catalytic reduction (SCR) of NOx species. To understand how transition metal ions (TMIs) can effect NOx reduction chemistry, both structural and mechanistic aspects at the atomic level are needed. In this review, we discuss the coordination chemistry of TMIs and their mobility within the zeolite framework, the reactivity of active sites, and the mechanisms and intermediates in the NH3-SCR reaction. We emphasise the key relationship between TMI coordination and structure and mechanism and discuss approaches to enhancing catalytic activity via structural modifications.
ISSN:0306-0012
1460-4744
1460-4744
DOI:10.1039/d3cs00468f