Article,

Discovery of COsub 2 precursor in the reaction of CO and O on Pt(111)

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J. Chem. Phys., 116 (7): 2684-2687 (2002)
DOI: 10.1063/1.1449948

Abstract

Using the technique of Cs+ reactive ion scattering (Cs+ RIS), we show that reaction of CO and O on a Pt(111) surface produces a CO2 precursor species that remains stable on the surface up to 300 K. The CO2 species desorbs with an activation energy of 46�3 kJ mol�1, whereas the direct CO2 gas formation via Langmuir�Hinshelwood (LH) reaction between CO and O occurs with an activation energy of 75�4 kJ mol�1. The observation reveals a new pathway for CO oxidation reaction, which is different from the direct LH pathway.

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