Active Surface Oxygen for Catalytic CO Oxidation on Pd(100) Proceeding under Near Ambient Pressure Conditions
Citations Over TimeTop 10% of 2012 papers
Abstract
Catalytic CO oxidation reaction on a Pd(100) single-crystal surface under several hundred mTorr pressure conditions has been studied by ambient pressure X-ray photoelectron spectroscopy and mass spectroscopy. In-situ observation of the reaction reveals that two reaction pathways switch over alternatively depending on the surface temperature. At lower temperatures, the Pd(100) surface is covered by CO molecules and the CO2 formation rate is low, indicating CO poisoning. At higher temperatures above 190 °C, an O-Pd-O trilayer surface oxide phase is formed on the surface and the CO2 formation rate drastically increases. It is likely that the enhanced rate of CO2 formation is associated with an active oxygen species that is located at the surface of the trilayer oxide.
Related Papers
- → Preliminary study on similarity of glow discharges in scale-down gaps(2013)7 cited
- → The origin of apparent deactivation during the oxidation of carbon monoxide over silica-supported platinum at moderate temperatures(1986)26 cited
- → A high pressure infrared spectral study of the reactions of dodecacarbonyltetrairidium with carbon monoxide and hydrogen(1972)22 cited
- → The interaction of titanium films with oxygen over a wide range of pressures and exposures(1980)8 cited
- → A sensitive, constant resistance pirani gauge with a fast response time(1969)3 cited