Journal ArticleDOI
A note on multiplicity of the steady state and oscillation‐phenomena in catalytic oxidation
L. Riekert
- Vol. 85, Iss: 4, pp 297-299
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In this article, it was shown that if thermodynamics permits the existence of a metal as well as that of an oxide on the surface of a catalyst in contact with the reactants, oscillations in the kinetic regime may result if neither of these two phases is kinetically stable.Abstract:
Multiplicity of the steady state is to be expected if thermodynamics permits the existence of a metal as well as that of an oxide on the surface of a catalyst in contact with the reactants; oscillations in the kinetic regime may result if neither of these two phases is kinetically stable.read more
Citations
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Journal ArticleDOI
Kinetic oscillations in the catalytic CO oxidation on Pt(100): Theory
TL;DR: In this paper, a set of coupled differential equations describing the kinetics of catalytic oxidation of CO on well-defined Pt(100) surfaces at low pressures (∼10−4 Torr) revealed the occurrence of kinetic oscillations which were associated with periodic transformations of the surface structure propagating wave-like across the surface area.
Book ChapterDOI
Oscillatory Reactions in Heterogeneous Catalysis
TL;DR: In this article, the authors focus on the oscillatory reactions in heterogeneous catalysis, and they show that many surface reactions oscillate; probably all bimolecular oxidation reactions on transition metals will exhibit oscillations under some conditions.
Journal ArticleDOI
Electrochemical promotion of the oxidation of propane on Pt/YSZ and Rh/YSZ catalyst-electrodes
N. Kotsionopoulos,Symeon Bebelis +1 more
TL;DR: In this article, the effect of electrochemical promotion (EP) or nonfaradaic electrochemical modification of catalytic activity (NEMCA) was studied in the catalytic reaction of the total oxidation of propane on Pt and Rh films deposited on Y2O3-stabilized-ZrO2 (or YSZ), an O 2) conductor, in the temperature range 420-520 � C.
Journal ArticleDOI
Isothermal oscillations in the catalytic decomposition of nitrous oxide over Cu-ZSM-5
Hans-Günther Lintz,Thomas Turek +1 more
TL;DR: In this paper, the catalytic decomposition of nitrous oxide was studied on a copper-exchanged ZSM-5 catalyst in the temperature range 648-723 K. Using a mixture of 1000 ppm N2O in nitrogen, isothermal oscillations both in nitrous dioxide and oxygen concentrations occurred, accompanied by formation of small amounts of NO.
Journal ArticleDOI
Feste Ionenleiter in der heterogenen Katalyse
TL;DR: In this article, the Moglichkeit der Oxidbildung bei Reaktionen an Edelmetallen oder der Verbesserung von Selektivitat and Ausbeute bei der Epoxidierung von Ethen an Silberkatalysatoren is discussed.
References
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Book ChapterDOI
Elementary Steps in the Catalytic Oxidation of Carbon Monoxide on Platinum Metals
T. Engel,Gerhard Ertl +1 more
TL;DR: In this article, the authors investigated the influence of surface structure on the catalytic activity of a single crystal whose surface was curved in such a way that not only the plane but also vicinals with varying step density of two different crystallographic directions were present.
Journal ArticleDOI
Thermodynamic Properties of the Oxides and their Vaporization Processes.
Journal ArticleDOI
Thermisch und kinetisch verursachte Instabilitäten im Reaktionsverhalten einzelner Katalysatorkörner
H. Beusch,P. Fieguth,E. Wicke +2 more
TL;DR: In this article, Zund/Losch-Erscheinungen als einfache Beispiele thermisch verursachter Instabilitaten studiert.
Journal ArticleDOI
Self-Oscillations of Heterogeneous Catalytic Reaction Rates
TL;DR: In this article, selfoscillation processes were used to study the regularities of a reaction medium with a catalytic surface under norrsteady-state conditions operating for a longer time.
Journal ArticleDOI
The reaction between H2 and O2 over supported platinum catalysts
F.V. Hanson,Michel Boudart +1 more
TL;DR: In this article, the stationary state reaction between H2 and O2 over Pt SiO 2 catalysts has been studied between 273 and 373 K in both excess hydrogen and excess oxygen on samples with dispersion of platinum varying between 1.0 and 0.14.