Abstract
The paper uses Quantum state-resolved scattering experiment and theory to show that surface-induced intramolecular vibrational energy redistribution in methane-surface scattering is related to the catalytic activity of the impact site.
Highlights
Uncovering the dynamics of a chemical reaction between a gas-phase molecule and a solid surface is key to understanding and predicting heterogeneous catalysis, a process of great economic and ecological value
Scattered methane molecules were detected with quantum state resolution by a highly sensitive liquid He-cooled bolometer in combination with state-specific laser tagging using a second IR-OPO system by virtue of the bolometer infrared laser tagging (BILT) technique, as we have demonstrated in a recent publication [8]
The quantum-state population of the scattered CH4 is encoded in these spectra with each line corresponding to a vibrational transition originating from a rovibrationally excited quantum state that was populated by the molecule– surface collision
Summary
Uncovering the dynamics of a chemical reaction between a gas-phase molecule and a solid surface is key to understanding and predicting heterogeneous catalysis, a process of great economic and ecological value. We have implemented a state-resolved method for detecting molecules scattered from surfaces based on a cryogenic bolometer and quantum state-specific infrared laser tagging [7,8].
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