Abstract
The individual grains of a polycrystalline platinum surface as well as the spatio-temporal concentration patterns associated with catalytic oxidation of carbon monoxide were imaged by means of photoemission electron microscopy (PEEM). For CO and O 2 partial pressures in the 10 −4 mbar range and at temperatures between 420 and 560 K different categories of pattern formation are observed which may be correlated with similar features observed previously with low-index single crystal planes, namely bistable behavior, propagating reaction fronts as well as spirals and target patterns. A novel effect concerns the appearance of regions with work functions considerably below those of the respective clean surfaces which are presumably due to the formation of subsurface oxygen species.
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.
