Details

Autor(en) / Beteiligte

• Kubiak, L.
• Righini, L.
• Castoldi, L.
• Matarrese, R.
• Forzatti, P.
• Lietti, L.
• Daturi, M.

Titel

Mechanistic Aspects of N2O Formation Over Pt-Based Lean NOx Trap Catalysts

Ist Teil von

• Topics in catalysis, 2016-07, Vol.59 (10-12), p.976-981

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this paper mechanistic aspects on the formation of N 2 O over a model Pt–Ba/Al 2 O 3 NO x storage and reduction catalyst are investigated. The data indicate that N 2 O formation involves the coupling of N-adspecies with undissociated NO molecules: accordingly this requires the presence of partially reduced Pt sites, to catalyse the NO dissociation into N- and O-adspecies on one side and to prevent complete NO dissociation on the other side. In fact N 2 O formation is observed at temperatures where the reductant leads to a partial reduction of the Pt sites, at increasing temperatures in the order CO > NH 3  > H 2 .