High-Pressure CO Oxidation on Pt(111) Monitored with Infrared-Visible Sum Frequency Generation (SFG)

摘要

Catalytic CO oxidation on Pt(111) to CO_2 was studied under atmospheric pressures of CO and O_2 and at various temperatures. Surface vibrational spectroscopy by sum frequency generation was used to probe the surface species, while the reaction rate and gas composition were simultaneously monitored by gas chromatography. Correlation between the turnover rates and the surface coverage of various CO species were utilized to identify the active CO species in the reaction.