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Surface femtochemistry: Ultrafast reaction dynamics driven by hot electron mediated reaction pathways

MPS-Authors
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Denzler,  Daniel N.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Hess,  Christian
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Funk,  Stephan
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Ertl,  Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Bonn,  Mischa
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Frischkorn,  Christian
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Wolf,  Martin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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引用

Denzler, D. N., Hess, C., Funk, S., Ertl, G., Bonn, M., Frischkorn, C., & Wolf, M. (2002). Surface femtochemistry: Ultrafast reaction dynamics driven by hot electron mediated reaction pathways. In A., Douhal, & J., Santamaria (Eds.), Femtochemistry and Femtobiolgy – Ultrafast Dynamics in Molecular Science (pp. 652-663). New Jersey-Singapore: World Scientific.


引用: http://hdl.handle.net/11858/00-001M-0000-0011-164E-6
要旨
Fundamental insights into the ultrafast dynamics of energy transfer processes at surfaces are of central importance for a microscopic understanding of chemical reactions at solid surfaces, e.g. in heterogeneous catalysis. The detailed investigation of the rates and pathways of energy flow in the adsorbate-substrate system as well as the chemical dynamics has become possible utilizing intense femtosecond laser pulses. Surprisingly, the strong non-equilibrium situation that arises upon irradiation with these pulses results in a new reaction channel caused by hot electron excitation for a number of systems investigated. This electron-mediated reaction mechanism is exemplified here for the model reaction H-ad + H-ad –> H-2,g on Ru(001) and discussed in the broader context of other simple reactions such as the formation of H2O, CO2 and the CO desorption on the same surface.