Hydrogen-Induced Adsorption of Carbon Monoxide on the Gold Dimer Cation: A Joint Experimental and DFT Investigation.

Authors :: Vojkovic M
Rayane D
Antoine R
Broyer M
Allouche AR
Mignon P
Dugourd P
Source :: The journal of physical chemistry. A [J Phys Chem A] 2017 Jun 15; Vol. 121 (23), pp. 4404-4411. Date of Electronic Publication: 2017 Jun 02.
Publication Year :: 2017
Abstract: It is demonstrated, using tandem mass spectrometry and radio frequency ion trap, that the adsorption of a H atom on the gold dimer cation, Au <subscript>2</subscript> H <superscript>+</superscript> , prevents its dissociation and allows for adsorption of CO. Reaction kinetics are measured by employing a radio frequency ion trap, where Au <subscript>2</subscript> <superscript>+</superscript> and CO interact for a given reaction time. The effect of a hydrogen atom is evaluated by comparing reaction rate constants measured for Au <subscript>2</subscript> <superscript>+</superscript> and Au <subscript>2</subscript> H <superscript>+</superscript> . The theoretical results for the adsorption of CO molecules and their reaction characteristics with Au <subscript>2</subscript> <superscript>+</superscript> and Au <subscript>2</subscript> H <superscript>+</superscript> are found to agree with the experimental findings. The joint investigations provide insights into hydrogen atom adsorption effects and consequent reaction mechanisms.

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