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- W1995348030 abstract "Using different isotopologues of the reactant gases CO and O2, infrared reflection absorption spectroscopy (IRAS) has been used to investigate the transient surface species on the Pt{100} surface under reaction conditions which was first shown to give rise to an absorption band around 1630 cm-1 by Hong and Richardson (J. Phys. Chem. 1993, 97, 1258). The results show that this band cannot be attributed to a C−O stretching frequency of the CO from the gas-phase incorporated into a CO−O surface complex, such as that identified as the transition state in recent density-functional theory (DFT) calculations of the Pt{111}/CO + O2 and Pt{100}/CO + NO reactions. The IRAS results are consistent, however, with a surface O−C−O species of low symmetry in which the IR band is due to a C−O stretching mode involving an O atom arising from the molecular O2, and estimates of the desorption energy of this species show it is chemisorbed. This surface intermediate may also be involved in the CO + NO oxidation reaction over Pt{100}, but the steady-state coverage at the higher reaction temperature would preclude its observation in IRAS. The results suggest that further DFT calculations exploring alternative reaction paths may be of value." @default.
- W1995348030 created "2016-06-24" @default.
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- W1995348030 date "2004-04-24" @default.
- W1995348030 modified "2023-09-23" @default.
- W1995348030 title "A CO<sub>2</sub> Surface Molecular Precursor during CO Oxidation over Pt{100}" @default.
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- W1995348030 doi "https://doi.org/10.1021/jp0497918" @default.
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