Non-Linear Processes on Pt, Rh, Pd, Ir and Ru Surfaces During the NO-Hydrogen Reactions | Sciact - CRIS-система Института катализа

Non-Linear Processes on Pt, Rh, Pd, Ir and Ru Surfaces During the NO-Hydrogen Reactions Обзор

Конференция

Physical Methods for Catalytic Research at the Molecular Level: International memorial K.I. Zamaraev conference
28 июн. - 2 июл. 1999 , Novosibirsk

Журнал

Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169

Вых. Данные

Год: 2000, Том: 158, Номер: 1, Страницы: 115-128 Страниц : 14 DOI: 10.1016/S1381-1169(00)00050-9

Ключевые слова

NO + H2 reactions, Non-linearity, Oscillation

Авторы

Cobden P. ¹ , de Wolf C. ¹ , Smirnov M.Y. ² , Makeev A.G. ³ , Nieuwenhuys B. ¹

Организации

1	Leiden University, Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, Netherlands
2	Boreskov Institute of Catalysis, SB RAS, 630090 Novosibirsk, Russia
3	Department of Comput. and Cybernetics, Moscow State University, Moscow 119899, Russia

Информация о финансировании (4)

1	Netherlands Organisation for Scientific Research
2	International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union	4A-95-186
3	International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union	99-01882
4	Netherlands Institute for Catalysis Research	00-2-02

The present paper reviews our research in the field of NO+H2 reactions over Pt, Rh, Pd, Ir and Ru surfaces. Emphasis will be placed on the ability of these platinum group metals to produce oscillations in both reaction rate and selectivity, in addition to other non-linear processes such as hysteresis phenomena. In the case of Rh, non-linearity is related to periodic transitions between N- and O-rich surfaces, with O destabilising the N-adlayer and causing an acceleration in the N2 production. However, in the case of Pt, the important step involves the creation of vacant sites required for NO dissociation, whereby products leaving the surface facilitate an autocatalytic rise in the concentration of such vacancies and, hence, reaction rate. Ir positions itself between the former two, because oscillations have been observed in two different regimes. Both a lower-temperature Pt-like and higher-temperature Rh-like behaviours have been observed on different Ir surfaces. New results gained from field emission microscopy (FEM) and field ion microscopy (FIM) measurements are presented to consolidate the lower-temperature Pt-like behaviour, and confirm the dualistic nature of Ir. No oscillations in rate have been observed over Pd(111) or Ru(0001). The Ru surface exhibits selectivity to N2 of almost 100% even in large excess of hydrogen.

Cobden P. , de Wolf C. , Smirnov M.Y. , Makeev A.G. , Nieuwenhuys B.
Non-Linear Processes on Pt, Rh, Pd, Ir and Ru Surfaces During the NO-Hydrogen Reactions
Journal of Molecular Catalysis A: Chemical. 2000. V.158. N1. P.115-128. DOI: 10.1016/S1381-1169(00)00050-9 WOS Scopus РИНЦ CAPlusCA OpenAlex

Опубликована online:	18 июл. 2000 г.
Опубликована в печати:	8 сент. 2000 г.

Web of science:	WOS:000089201200011
Scopus:	2-s2.0-0034622990
РИНЦ:	13353131
Chemical Abstracts:	2000:498672
Chemical Abstracts (print):	133:312790
OpenAlex:	W2134733372

БД	Цитирований
Web of science	27
Scopus	29
РИНЦ	29
OpenAlex	29