Relevance of the Nitrite Route in the NO  x   Adsorption Mechanism over Pt–Ba/Al 2 O 3  NO  x   Storage Reduction Catalysts Investigated by using Operando FTIR Spectroscopy | Zendy

Lietti L. | Zendy; Daturi M. | Zendy; BlasinAubé V. | Zendy; Ghiotti G. | Zendy; Prinetto F. | Zendy; Forzatti P. | Zendy

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Relevance of the Nitrite Route in the NO x Adsorption Mechanism over Pt–Ba/Al 2 O 3 NO x Storage Reduction Catalysts Investigated by using Operando FTIR Spectroscopy

Author(s) -

Lietti L.,

Daturi M.,

BlasinAubé V.,

Ghiotti G.,

Prinetto F.,

Forzatti P.

Publication year - 2012

Publication title -

chemcatchem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.497

H-Index - 106

eISSN - 1867-3899

pISSN - 1867-3880

DOI - 10.1002/cctc.201100304

Subject(s) - nitrite , nox , catalysis , adsorption , chemistry , inorganic chemistry , redox , nitrate , organic chemistry , combustion

Nitrites dominate! Nitrites and nitrates are formed on the catalyst surface upon storage of NO x over a model Pt–Ba/Al 2 O 3 NO x storage–reduction catalyst. Nitrites are formed through the oxidation of NO at the Pt–Ba interface ( nitrite route ), while nitrates are formed upon nitrite oxidation and/or NO 2 adsorption following NO oxidation at Pt sites. The nitrite route is the unique pathway responsible for the storage of NO x at low temperatures, but it also dominates at high temperatures.

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