Abstract
Transient phenomena, which occur in the oxidation reaction of carbon monoxide catalyzed by palladium, have been characterized. The substrate, a polycrystalline palladium foil initially exposed to relatively large amounts of oxygen at high temperatures, was dosed alternately with oxygen and carbon monoxide and transient carbon dioxide production was monitored mass spectrometrically. Two different reaction paths were found to prevail. When oxygen is preadsorbed, exposure to carbon monoxide leads to carbon dioxide through CO(g) + O(a) → CO 2(g), an Eley-Rideal path. When the dosing sequence is reversed, a Langmuir-Hinshelwood reaction occurs, CO(a) + O(a) → CO 2(g). The former reaction can be used to quantitatively titrate surface oxygen and two methods of analysis can be used to determine the amount of adsorbed oxygen under working conditions. One method is useful when the working pressure of CO is low while the other is useful when it is high.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
