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

Tomonori Ito; G. Naresh Patwari; Masashi Arakawa; Akira Terasaki

doi:10.1021/jp501111f

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

Tomonori Ito, G. Naresh Patwari, Masashi Arakawa, Akira Terasaki

Physical Chemistry

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

It is demonstrated, using tandem mass spectrometry and ion trap, that preadsorption of a H₂O molecule on the gold dimer cation, Au₂⁺, enhances adsorption of CO and O₂ molecules, which is otherwise inert toward these molecules. The rate of adsorption of CO on Au₂(H₂O)⁺ was found to be higher by 2 orders of magnitude relative to bare Au₂⁺. 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-Au bond upon adsorption of a water molecule. Further, it was also observed that preadsorption of H₂O leads to dramatic enhancement of O₂ adsorption on the Au₂⁺ ion, which can be attributed to the changes in the electron density following water adsorption.(Chemical Equation Presented).

Original language	English
Pages (from-to)	8293-8297
Number of pages	5
Journal	Journal of Physical Chemistry A
Volume	118
Issue number	37
DOIs	https://doi.org/10.1021/jp501111f
Publication status	Published - Sept 18 2014

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry

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10.1021/jp501111f

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title = "Water-Induced Adsorption of Carbon Monoxide and Oxygen on the Gold Dimer Cation",

abstract = "It is demonstrated, using tandem mass spectrometry and ion trap, that preadsorption of a H2O molecule on the gold dimer cation, Au2+, enhances adsorption of CO and O2 molecules, which is otherwise inert toward these molecules. The rate of adsorption of CO on Au2(H2O)+ was found to be higher by 2 orders of magnitude relative to bare Au2+. 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-Au bond upon adsorption of a water molecule. Further, it was also observed that preadsorption of H2O leads to dramatic enhancement of O2 adsorption on the Au2+ ion, which can be attributed to the changes in the electron density following water adsorption.(Chemical Equation Presented).",

author = "Tomonori Ito and Patwari, {G. Naresh} and Masashi Arakawa and Akira Terasaki",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2014",

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day = "18",

doi = "10.1021/jp501111f",

language = "English",

volume = "118",

pages = "8293--8297",

journal = "Journal of Physical Chemistry A",

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TY - JOUR

T1 - Water-Induced Adsorption of Carbon Monoxide and Oxygen on the Gold Dimer Cation

AU - Ito, Tomonori

AU - Patwari, G. Naresh

AU - Arakawa, Masashi

AU - Terasaki, Akira

PY - 2014/9/18

Y1 - 2014/9/18

N2 - It is demonstrated, using tandem mass spectrometry and ion trap, that preadsorption of a H2O molecule on the gold dimer cation, Au2+, enhances adsorption of CO and O2 molecules, which is otherwise inert toward these molecules. The rate of adsorption of CO on Au2(H2O)+ was found to be higher by 2 orders of magnitude relative to bare Au2+. 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-Au bond upon adsorption of a water molecule. Further, it was also observed that preadsorption of H2O leads to dramatic enhancement of O2 adsorption on the Au2+ ion, which can be attributed to the changes in the electron density following water adsorption.(Chemical Equation Presented).

AB - It is demonstrated, using tandem mass spectrometry and ion trap, that preadsorption of a H2O molecule on the gold dimer cation, Au2+, enhances adsorption of CO and O2 molecules, which is otherwise inert toward these molecules. The rate of adsorption of CO on Au2(H2O)+ was found to be higher by 2 orders of magnitude relative to bare Au2+. 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-Au bond upon adsorption of a water molecule. Further, it was also observed that preadsorption of H2O leads to dramatic enhancement of O2 adsorption on the Au2+ ion, which can be attributed to the changes in the electron density following water adsorption.(Chemical Equation Presented).

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JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 37

ER -

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

Abstract

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