Ammonia Oxidation on Pt(410) | Sciact - научная деятельность

Ammonia Oxidation on Pt(410) Научная публикация

Журнал

Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694

Вых. Данные

Год: 2006, Том: 242, Номер: 1, Страницы: 184-194 Страниц : 11 DOI: 10.1016/j.jcat.2006.06.011

Авторы

Weststrate C.J. ¹ , Bakker J.W. ¹ , Rienks E.D.L. ¹ , Vinod C.P. ^1,2 , Matveev A.V. ³ , Gorodetskii V.V. ³ , Nieuwenhuys B.E. ^1,2

Организации

1	Leids Instituut voor Chemisch Onderzoek, Universiteit Leiden, P.O. Box 9502, Einsteinweg 55, 2333 CC Leiden, The Netherlands
2	Technische Universiteit Eindhoven, Schuit Institute of Catalysis, P.O. Box 5600 MB, Eindhoven, The Netherlands
3	Boreskov Institute of Catalysis, Russian Academy of Sciences, Novosibirsk 630090, Russia

The adsorption of both O2 and NH3 on Pt(410) was studied using temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). Molecular NH3 desorbed from Pt(410) between 100 and 450 K, and dissociation was not observed. Radiation (X-rays, electrons) induced NH3ad dissociation, and as a result several dissociation products (NH2ad, NHad, and Nad) were observed in the N 1s core-level spectrum. NHad is a rather stable dissociation product that starts to dehydrogenate above 350 K. The Nad and Had formed in this process desorbed on formation (as N2 and H2). Both molecular and dissociative O2 adsorption were observed after the surface was exposed to O2(g) at 100 K. Molecularly adsorbed O2 desorbed below 200 K, whereas atomic oxygen desorbed (as O2) between 600 and 900 K, in two distinct desorption peaks. In the O 1s core-level spectrum, both molecular O2 and two different types of Oad were distinguished. NH3ad dissociation was observed on an oxygen-presaturated surface. The NH3ad oxy-dehydrogenation started at 150 K. NOad and NO(g) were also observed, but only during experiments in which an excess of Oad was available. NOad desorbed/decomposed between 400 and 500 K. For the steady-state ammonia oxidation reaction, N2 and H2O were the major products at low temperatures, whereas the selectivity toward NO and H2O changed at higher temperatures. This selectivity change can be attributed to changes in surface composition.

Weststrate C.J. , Bakker J.W. , Rienks E.D.L. , Vinod C.P. , Matveev A.V. , Gorodetskii V.V. , Nieuwenhuys B.E.
Ammonia Oxidation on Pt(410)
Journal of Catalysis. 2006. V.242. N1. P.184-194. DOI: 10.1016/j.jcat.2006.06.011 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact

Поступила в редакцию:	19 апр. 2006 г.
Принята к публикации:	13 июн. 2006 г.
Опубликована online:	12 июл. 2006 г.
Опубликована в печати:	15 авг. 2006 г.

Web of science:	WOS:000240352900018
Scopus:	2-s2.0-33746023926
РИНЦ:	13506336
Chemical Abstracts:	2006:757910
Chemical Abstracts (print):	145:218866
OpenAlex:	W2093159965
Sciact:	5010

БД	Цитирований
Scopus	35
OpenAlex	36