Energy partitioning in the femtosecond-laser-induced associative<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi mathvariant="normal">D</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>desorption from Ru(0001)

Wagner, Steffen; Frischkorn, Christian; Wolf, Martin; Rutkowski, M.; Zacharias, H.; Luntz, A. C.

doi:10.1103/physrevb.72.205404

Cited by 29 publications

(73 citation statements)

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“…So far, such a complete analysis could only be performed for the associative desorption reaction of hydrogen (H + H!H 2 ) on Ru(001). [101,102] We will, therefore, briefly summarize the main conclusions of this study and discuss these findings in the context of the CO + O oxidation reaction.…”

Section: Multidimensional Dynamicsmentioning

confidence: 98%

“…[101] The dynamics of this reaction have been comprehensively studied using rovibrational state-selective detection as well as ab initio theoretical modeling. [102] The desorbing hydrogen molecules exhibit a rather low excitation of the vibrational degrees of freedom (in comparison to the translation) and even less in the rotations.…”

Section: Multidimensional Dynamicsmentioning

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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Section: Multidimensional Dynamicsmentioning

confidence: 98%

Section: Multidimensional Dynamicsmentioning

confidence: 99%

CO Oxidation as a Prototypical Reaction for Heterogeneous Processes

et al. 2011

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“…H 2 ) auf Ru(001) durchgeführt werden. [95,96] Wir fassen daher die wesentlichen Erkenntnisse dieser Studie kurz zusammen und diskutieren diese im Kontext der Oxidationsreaktion CO + O.…”

Section: Multidimensionale Dynamikunclassified

“…Die fs-Laser-induzierte assoziative Desorption von Wasserstoff, d. h. die Rekombination zweier Wasserstoffatome auf Ru(001), wird durch elektronische Reibung (analog zur COOxidation auf Ru) [95] vermittelt. Die Dynamik dieser Reaktion wurde durch rovibronische zustandsselektive Detektion und Ab-initio-Modelle eingehend studiert.…”

Section: Multidimensionale Dynamikunclassified

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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“…An example -see below -is associative desorption of H 2 from Ru(0001) by FL pulses, where n % 3 has been observed experimentally [12,18,19]. A second key difference between DIMET and DIET is that DIMET typically leads to higher yields but -due to electronic quenching -they are still low as compared to yields for photoreactions at insulators.…”

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confidence: 99%

Theory of Femtochemistry at Metal Surfaces: Associative Molecular Photodesorption as a Case Study

Saalfrank

Klamroth

Vazhappilly

et al. 2010

Dynamics at Solid State Surfaces and Interfaces

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Reactions on surfaces are of great scientific interest because of their diverse applications. Well-known examples are the production of ammonia on metal surfaces for fertilizers and reduction of poisonous gases from automobiles using catalytic converters [1]. For these applications, metal surfaces -most notably, those consisting of transition metals -are particularly interesting as they offer a great variety of electronic structure and, therefore, tunability toward specific targets.Photoinduced reactions at surfaces were also studied in detail [2][3][4][5]. These are useful, for example, for photocatalysis and nanostructuring of surfaces. Some of these reactions are occurring on femtosecond (1 fs ¼ 10 À15 s) timescale [6]. The advent of femtosecond lasers -that is, ultrashort and intense laser pulses -offers the possibility to monitor these motions in real time, for example, by two-pulse correlation techniques. Moreover, femtochemistry at metal surfaces can be very distinct -on quantitative and qualitative scales -from more traditional surface photochemistry driven by conventional light sources [5,6].Photochemistry at metal surfaces may or may not proceed indirectly, that is, by initial excitation of the substrate electrons rather than by direct excitation of the adsorbate. One way to distinguish between the direct or the substrate-mediated route is through a dependence (direct) [7], or lack thereof (substrate mediated) [8,9], of the reaction cross section on the polarization of the incoming light. In particular for initiating photons in the UV/vis regime, which can deeply penetrate into metal surfaces [10], indirect mechanisms have been suggested to be operative in many cases. Further, when femtosecond lasers (FLs) are used, hot metal electrons that are attached to the adsorbate are believed to often trigger the reaction rather than phonons [6, 11] (see below). For the reaction of interest below, photodesorption of H 2 from Ru(0001), experiments suggest a substrate-mediated, hot-electron-driven mechanism [12].The indirect, substrate-mediated excitation can also be categorized according to its fluence dependence. For the prototypical case of photodesorption, for example,

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Energy partitioning in the femtosecond-laser-induced associativeD2desorption from Ru(0001)

Cited by 29 publications

References 48 publications

CO Oxidation as a Prototypical Reaction for Heterogeneous Processes

CO Oxidation as a Prototypical Reaction for Heterogeneous Processes

Die CO‐Oxidation als Modellreaktion für heterogene Prozesse

Theory of Femtochemistry at Metal Surfaces: Associative Molecular Photodesorption as a Case Study

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