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Water-Induced Adsorption of Carbon Monoxide and Oxygen on the Gold Dimer Cation

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Title Water-Induced Adsorption of Carbon Monoxide and Oxygen on the Gold Dimer Cation
 
Creator ITO, T
PATWARI, GN
ARAKAWA, M
TERASAKI, A
 
Subject CO OXIDATION
SUPPORTED GOLD
CLUSTER ANIONS
CATALYSTS
TEMPERATURE
ACTIVATION
IONS
NANOPARTICLES
HYDROGEN
AU-2(-)
 
Description It is demonstrated, using tandem mass spectrometry and ion trap, that preadsorption of a H2O molecule on the gold dimer cation, Au-2(+), enhances adsorption of CO and O-2 molecules, which is otherwise inert toward these molecules. The rate of adsorption of CO on Au-2(H2O)(+) was found to be higher by 2 orders of magnitude relative to bare Au-2(+). The enhancement of the CO adsorption rate is due to the presence of a reaction channel, which cleaves the Au-Au bond, leading to the formation of Au(H2O)(CO)(+). Such an observation can be attributed to weakening of the Au-(A)u bond upon adsorption of a water molecule. Further, it was also observed that preadsorption of H2O leads to dramatic enhancement of O-2 adsorption on the Au-2(+) ion, which can be attributed to the changes in the electron density following water adsorption.
 
Publisher AMER CHEMICAL SOC
 
Date 2014-12-29T05:51:06Z
2014-12-29T05:51:06Z
2014
 
Type Article
 
Identifier JOURNAL OF PHYSICAL CHEMISTRY A, 118(37)8293-8297
1089-5639
http://dx.doi.org/10.1021/jp501111f
http://dspace.library.iitb.ac.in/jspui/handle/100/17238
 
Language English