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In situ DRIFTS study ofsurface species formed over sodium promoted Pt/Al2O3 catalysts during thereduction of NO by C3H6”

Matsouka Vasiliki, Koukiou S., Konsolakis Michail, Yentekakis Ioannis.V.

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URIhttp://purl.tuc.gr/dl/dias/10CEEC83-261C-46A2-A99F-55F4E319DA80-
Αναγνωριστικόhttp://www.srcosmos.gr/srcosmos/showpub.aspx?aa=11012-
Γλώσσαen-
ΤίτλοςIn situ DRIFTS study of surface species formed over sodium promoted Pt/Al2O3 catalysts during the reduction of NO by C3H6”en
ΔημιουργόςMatsouka Vasilikien
ΔημιουργόςΜατσουκα Βασιλικηel
Δημιουργός Koukiou S.en
ΔημιουργόςKonsolakis Michailen
ΔημιουργόςΚονσολακης Μιχαηλel
Δημιουργός Yentekakis Ioannis.V.en
ΠερίληψηThe nature and the relative population of adsorbed species formed on the surface of un-promoted and sodium promoted Pt catalysts supported on γ-Al2O3 was investigated by using in situ DRIFT Spectroscopy, during the NO reduction by propene. Under steady-state reaction conditions, the surface of the un-promoted Pt/γ-Al2O3 catalyst is mainly covered by adsorbed hydrocarbon fragments, formates, acetates and cyanide species. In contrast, the surface of Na-promoted Pt(Na)/γ- Al2O3 catalysts is predominantly covered by NOx ad-species, carbonyls, cyanides and isocyanates, whereas no hydrocarbons fragments were detected under reaction conditions. The present results demonstrate that the strongly enhanced catalytic performance of Na-modified Pt(Na)/Al2O3 catalysts, can be attributed to the pronounced effect of alkalis on the hydrocarbon and NO chemisorption bonds, which in turn prevents self-poisoning of catalyst surface by strongly bonded hydrocarbon fragments and carboxylates. en
ΤύποςΠλήρης Δημοσίευση σε Συνέδριοel
ΤύποςConference Full Paperen
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by-nc-nd/4.0/en
Ημερομηνία2015-11-15-
Ημερομηνία Δημοσίευσης2008-
Βιβλιογραφική ΑναφοράV. Matsouka, S. Koukiou, M. Konsolakis, I.V. Yentekakis, “In situ DRIFTS study of surface species formed over sodium promoted Pt/Al2O3 catalysts during the reduction of NO by C3H6”, in Proc. Protection and Restoration of the Environment IX, 2008.en

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