On the bonding and reactivity of CO2 on metal surfaces

Freund, H.‐J.; Messmer, R. P.

doi:10.1016/0039-6028(86)90580-7

Cited by 220 publications

(84 citation statements)

References 80 publications

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“…A survey of UPS results lists the metals Fe, Ni, Cu, Rh, Pd, and Ag without and with alkali adsorption of Na, K, and Cs [6]. Typical for these chemisorption systems is the appearance of negative CO, species as intermediates in the reaction path [7,8]. Similar effects are found with 0, and NO, 1.e.…”

Section: The Scattering Of Co At High and Low Work Function Surfacessupporting

confidence: 56%

Scattering of Small Molecules at Surfaces

Heiland

Schlathölter

Vicanek

1995

Physica Status Solidi (b)

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The interaction of energetic molecules with surfaces is of interest for nuclear fusion experiments, for the erosion of space vehicles, and for the understanding of basic charge exchange phenomena between metal surfaces and molecules. For the latter reason experiments with hyperthermal molecules are also of interest for catalytic processes and for the functioning of solid state sensors. In many cases the interaction of molecules with surfaces is governed by charge exchange processes. An obvious case is the catalytic oxidation of CO at surfaces where a negative carbon dioxide species is identified as an intermediate of the reaction. Negative carbon dioxide species are also found in beam experiments. Their yield and the correlated dissociation probabilities show the expected dependencies on e.g. the coverage of the metal with alkali metal layers. In the case of hydrogen molecules the influence of alkali layers is quite different. In chemisorption experiments alkalis cause a decrease of the dissociative chemisorption of hydrogen. In our beam experiments an increase of the molecular survival with alkali coverage is found accordingly. The interpretation of the findings gives more detailed insight into the dissociation mechanisms of small molecules.

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Section: The Scattering Of Co At High and Low Work Function Surfacessupporting

confidence: 56%

Scattering of Small Molecules at Surfaces

Heiland

Schlathölter

Vicanek

1995

Physica Status Solidi (b)

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“…Closer inspection reveals that this concept was used in the late 1940s by Cabrera and Mott [132] to understand metal oxidation and in the 1950s and 1960s by F. Vol'kenshtein to explain catalytic activity. [133] A quote from one of his papers from 1966 supports this: [7] "…the semiconductor (oxide) film arises as a result of oxidation of a metal, and its thickness can often be controlled to some extent…By varying the thickness..it is possible to…con-trol…the adsorption capacity, the catalytic activity, and the selectivity… It would be interesting to study the adsorption and catalytic properties of a semiconducting film on a metal, and their changes, during growth of the film". This concept was revived in the late 1980 is by Frost [134] and subsequently discussed by Boudart [135] and Ponec.…”

Section: Co Oxidation On a Highly Reactive Feo(111) Film Supported Onmentioning

confidence: 56%

“…[6] The hypothesis that the reaction product CO 2 is inert and does not interfere with the reaction is valid as long as no reducing species are coadsorbed, which neutralize the chemical potential of oxygen. Under these conditions CO 2 is chemisorbed, [7] as is documented by the many reactions involving the hydrogenation of CO 2 in the presence of CO, such as in the synthesis of methanol.…”

Section: Research Aspects In Co Oxidationmentioning

confidence: 97%

“…This reaction is a redox reaction, it operates in a "simple" Langmuir-Hinshelwood mode and can be quantified easily-as its sole product is CO 2 , which desorbs easily from many catalyst surfaces of relevance, with some notable exceptions. [7] We know for certain from surface science [18,21] that CO oxidation may proceed without materials gaps over singlecrystal model surfaces as well as over high-performance catalysts. For the case of Pd this was verified in two sets of rigorous molecular beam studies on single crystals [4] and on supported nanoparticles.…”

Section: Co Oxidation As a Probe Reaction In Industrialmentioning

confidence: 99%

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CO Oxidation as a Prototypical Reaction for Heterogeneous Processes

et al. 2011

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CO oxidation, although seemingly a simple chemical reaction, provides us with a panacea that reveals the richness and beauty of heterogeneous catalysis. The Fritz Haber Institute is a place where a multidisciplinary approach to study the course of such a heterogeneous reaction can be generated in house. Research at the institute is primarily curiosity driven, which is reflected in the five sections comprising this Review. We use an approach based on microscopic concepts to study the interaction of simple molecules with well-defined materials, such as clusters in the gas phase or solid surfaces. This approach often asks for the development of new methods, tools, and materials to prove them, and it is exactly this aspect, both, with respect to experiment and theory, that is a trade mark of our institute.

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“…Die Annahme, dass das Reaktionsprodukt CO 2 sich inert verhält und keinen Einfluss auf die Reaktion hat, gilt, solange keine reduzierenden Spezies coadsorbiert werden, die das chemische Potential des Sauerstoffs neutralisieren. In diesem Fall wird CO 2 chemisorbiert, [7] wie es für viele die Hydrierung von CO 2 betreffende Reaktionen in Gegenwart von CO beschrieben wurde, beispielsweise für die Methanol-Synthese.…”

Section: Forschungsaspekte Der Co-oxidationunclassified

Die CO‐Oxidation als Modellreaktion für heterogene Prozesse

et al. 2011

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Die CO‐Oxidation, obwohl eine scheinbar einfache chemische Reaktion, dient als ein Modell, welches die Vielfalt und Attraktivität der heterogenen Katalyse offenbart. Das Fritz‐Haber‐Institut ist ein Ort, an dem ein multidisziplinärer Forschungsansatz zum Studium einer solchen heterogenen Reaktion innerhalb eines Instituts entwickelt und umgesetzt werden kann. Dabei ist die Forschung am Institut primär durch Neugier getrieben, was sich auch in den fünf Abschnitten dieses Aufsatzes widerspiegelt. Wir nutzen dabei mikroskopische Konzepte, um die Wechselwirkung einfacher Moleküle mit wohldefinierten Materialien wie Clustern in der Gasphase oder festen Oberflächen zu untersuchen. Dieser Ansatz erfordert nicht selten die Entwicklung von neuen Methoden, Werkzeugen und Materialien zur Verifizierung dieser Konzepte, und dies ermöglicht eine methodologisch solide, breit aufgestellte Herangehensweise als ein Markenzeichen des Instituts.

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On the bonding and reactivity of CO2 on metal surfaces

Cited by 220 publications

References 80 publications

Scattering of Small Molecules at Surfaces

Scattering of Small Molecules at Surfaces

CO Oxidation as a Prototypical Reaction for Heterogeneous Processes

Die CO‐Oxidation als Modellreaktion für heterogene Prozesse

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