Journal ArticleDOI
A molecular beam investigation of the catalytic oxidation of CO on Pd (111)
T. Engel,Gerhard Ertl +1 more
TLDR
In this paper, a detailed investigation of the steady-state and nonsteady-state reaction CO+1/2O2→CO2 on Pd (111) has been carried out with the molecular beam technique.Abstract:
A detailed investigation of the steady‐state and nonsteady‐state reaction CO+1/2O2→CO2 on Pd (111) has been carried out with the molecular beam technique. It could be shown conclusively that the reaction proceeds between two adsorbed species (Langmuir–Hinshelwood mechanism) throughout the temperature and pressure range investigated. For low CO coverages, the activation energy of the reaction was determined to be 25 kcal/mole, whereas at moderate CO coverages, a rearrangement of the oxygen adlayer takes place resulting in a reduction of the activation energy to 14 kcal/mole. It is not possible to formulate a simple kinetic expression for the reaction rate which is valid over the entire range of temperatures and pressures due to changes in the adsorption rate for O2, coadsorption of CO and O2, to diffusion in the adlayer, and to changes in the geometrical arrangement within the adlayer with varying coverage.read more
Citations
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Journal ArticleDOI
CO oxidation as a prototypical reaction for heterogeneous processes
TL;DR: This Review concludes that CO oxidation, although seemingly a simple chemical reaction, provides us with a panacea that reveals the richness and beauty of heterogeneous catalysis.
Journal ArticleDOI
A molecular beam study of the catalytic oxidation of CO on a Pt(111) surface
TL;DR: In this paper, the authors studied the reaction of carbon monoxide catalyzed by Pt(111) using reactive molecular beam-surface scattering and showed that at low coverage, the reaction proceeds with an activation energy E*LH =24.1 kcal/mole and a pre-exponential υ4 =0.11 cm2 particles−1
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
Chemisorption of CO and mechanism of CO oxidation on supported platinum nanoclusters.
Ayman D. Allian,Kazuhiro Takanabe,Kyle L. Fujdala,Xianghong Hao,Timothy J. Truex,Juan Cai,Corneliu Buda,Matthew Neurock,Enrique Iglesia,Enrique Iglesia +9 more
TL;DR: The data and their theoretical and mechanistic interpretations indicate that the remarkable structure insensitivity observed for CO oxidation reactions reflects average CO binding properties that are essentially independent of cluster size.
Journal ArticleDOI
Gas—surface interactions and dynamics; Thermal energy atomic and molecular beam studies
J.A. Barker,Daniel J. Auerbach +1 more
TL;DR: In this article, a review of recent advances in the use of thermal energy atomic and molecular beam methods to explore the dynamics of physical and chemical processes occuring at surfaces is presented.
References
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Journal ArticleDOI
Wechselwirkung vonCOundO2mit einerPd(100)-Oberfläche
TL;DR: In this paper, Park et al. unterstütze ein EinkristallScheibchen geeigneter Orientierung von 6mm Durchmesser und 1,5mm Dicke verwendet.
Journal ArticleDOI
Zum Mechanismus der katalytischen Oxydation von CO an Palladium
G. Ertl,M. Neumann +1 more
TL;DR: In this paper, a clean Pd(lll)-surface under UHV conditions by means of the technique of laser-induced thermal desorption was obtained, showing that the stationary formation of CO2 may only start if the carbon monoxide coverage becomes smaller than 2/3 of its maximum value.
Journal ArticleDOI
On the mechanism and kinetics of the CO-oxidation reaction on polycrystalline palladium: II. The kinetics☆
TL;DR: In this paper, the reaction orders with respect to CO2, CO and O2 were determined over various intervals of partial pressure, total pressure and temperature; 0.1 ⩽ P CO p O2 ⩾ 20, 10 −7 −3 Pa, and 450 K.
Journal ArticleDOI
Die Kohlenoxydverbrennung an Silber, Palladium und deren Legierung
G.-M. Schwab,K. Gossner +1 more
Related Papers (5)
Interactions between oxygen and carbon monoxide on a Pd(111) surface
Elementary Steps in the Catalytic Oxidation of Carbon Monoxide on Platinum Metals
T. Engel,Gerhard Ertl +1 more