Water dissociation associated with NO 2 coadsorption on Mo(110)-(1 × 6)-O: Effect of coverage and electronic properties of oxygen

Byoung Koun Min, R. G. Quiller, L. J. Deiner, C. M. Friend

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Water dissociation on an oxygen-covered Mo(110) surface was investigated using temperature-programmed reaction spectroscopy (TPRS) and infrared reflectance absorbance spectroscopy (IRAS). Adsorbed hydroxyl formation is enhanced by increasing the coverage of chemisorbed oxygen prior to exposure to water up to saturation (0.66 ML). Additional oxidation of the surface using NO 2 suppresses the formation of hydroxyl species (OH). There is no detectable change in the reaction of NO 2 on Mo(110)-(1 × 6)-O when either the water or hydroxyl is adsorbed on the Mo(110)-(1 × 6)-O surface prior to NO 2 adsorption. In contrast, NO 2 induces the displacement of water into the gas phase and the conversion of hydroxyl species to molecular water. Infrared spectra show that the dissociation of NO 2 populates three types of terminal oxygen sites on Mo(110)-(1 × 6)-O, and the population of the terminal oxygen at step sites increases with respect to the amount of NO 2 deposited. Overall, these results suggest that the oxidic property of oxygen results in a lack of activity for the water dissociation.

Original languageEnglish
Pages (from-to)20463-20468
Number of pages6
JournalJournal of Physical Chemistry B
Volume109
Issue number43
DOIs
Publication statusPublished - 2005 Nov 3
Externally publishedYes

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Electronic properties
dissociation
Oxygen
Hydroxyl Radical
Water
oxygen
electronics
water
Spectroscopy
Infrared radiation
spectroscopy
infrared spectra
Gases
vapor phases
saturation
reflectance
Adsorption
Oxidation
oxidation
adsorption

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Water dissociation associated with NO 2 coadsorption on Mo(110)-(1 × 6)-O : Effect of coverage and electronic properties of oxygen. / Min, Byoung Koun; Quiller, R. G.; Deiner, L. J.; Friend, C. M.

In: Journal of Physical Chemistry B, Vol. 109, No. 43, 03.11.2005, p. 20463-20468.

Research output: Contribution to journalArticle

Min, Byoung Koun ; Quiller, R. G. ; Deiner, L. J. ; Friend, C. M. / Water dissociation associated with NO 2 coadsorption on Mo(110)-(1 × 6)-O : Effect of coverage and electronic properties of oxygen. In: Journal of Physical Chemistry B. 2005 ; Vol. 109, No. 43. pp. 20463-20468.
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