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
Kinetics and multiple rate states of CO oxidation on Pt II. Linking UHV and atmospheric pressure kinetic behavior
TL;DR: Harold and Garske as discussed by the authors used two kinetic models to simulate Pt-catalyzed CO oxidation over a wide range of catalyst temperatures, gas compositions, and total pressures.
Journal ArticleDOI
The adsorption and reaction of CO and O2 on PdAu alloy wires
D.D. Eley,P.B. Moore +1 more
TL;DR: In this article, the authors studied the TPD of CO and O2 on PdAu alloy wires and measured the adsorption, sticking coefficient and maximum coverage of CO.
Journal ArticleDOI
Dynamics on individual reaction sites in steady-state carbon monoxide oxidation on stepped platinum(113)
TL;DR: In this article, the reaction kinetics and dynamics of carbon monoxide oxidation on a stepped Pt(113) = (s)2(111) × (001) surface were studied by angle-resolved kinetic and velocity measurements at the steady state.
Journal ArticleDOI
Periodic perturbation of the kinetics of heterogeneous catalytic reactions
TL;DR: In this article, a review of the literature on periodic perturbation of catalytic reactions is presented, which can result in complex reaction behavior, including period doubling and irregular kinetics provided that the external and internal frequencies do not coincide.
Journal ArticleDOI
Chemical dynamics from the gas-phase to surfaces
TL;DR: In this paper, Zhao et al. proposed a model of chemical reactivity based on the Born-Oppenheimer PES, which allows to make movies of reactions using calculated trajectories, effectively providing a microscope with time and space resolution.
References
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Journal ArticleDOI
Molecular beam study of the apparent activation barrier associated with adsorption and desorption of hydrogen on copper
TL;DR: In this article, the adsorption and desorption of H2 on the (100, (110), and stepped (310) crystal faces of copper was studied. And the energy and incident angle of the H2 beam were measured by a rotatable mass spectrometer.
Journal ArticleDOI
Adsorption of oxygen and oxidation of CO on the ruthenium (001) surface
TL;DR: The adsorption of oxygen on the ruthenium (001) surface has been studied using a combination of techniques: LEED/Auger, Kelvin probe contact potential changes, and flash desorption mass spectrometry as mentioned in this paper.
Journal ArticleDOI
Interaction of NO and O2 with Pd(111) surfaces. II
TL;DR: The surface region of Pd(111) is characterized by three different types of oxygen atoms, which may be distinguished by their thermal, chemical, structural and electronic properties as discussed by the authors.
Journal ArticleDOI
Angular distribution of hydrogen molecules desorbed from metal surfaces
TL;DR: In this paper, the angular distribution of desorbeded H2 molecules has been studied and the measured angular distributions are strongly peaked forward, indicating that they are not uniformly distributed.
Journal ArticleDOI
Chemisorption und katalytische Reaktion von Sauerstoff und Kohlenmonoxid an einer Palladium (110)-Oberfläche
Gerhard Ertl,P. Rau +1 more
TL;DR: In this article, the adsorption and catalytic reaction of oxygen and carbon monoxide on a Pd(110) surface has been studied by means of low energy electron diffraction (LEED) and mass spectrometric techniques.
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Interactions between oxygen and carbon monoxide on a Pd(111) surface
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T. Engel,Gerhard Ertl +1 more