Abstract
Abstract : A model catalyst made by platinum vapor deposition onto a thin alumina film is investigated with Transmission Electron Microscopy and High Resolution Electron Energy Loss Spectroscopy. The preparation techniques are fully described, then the results of TEM analysis for platinum deposits from 0.3 monolayers to 1.7 monolayers are reported, for which clusters varying from 1.0 to 1.6 nanometers in diameter are observed. High Resolution Electron Energy Loss Spectroscopy spectra are reported for the cases of carbon monoxide and ethylene adsorption onto the model. For the case of CO adsorption, it is shown that the catalyst is stable when heated to 500 K. For the case of ethylene adsorption, pi and di-sigma species are identified for adsorption at 165 K, but on warming to 325 K, ethylidyne is only observed for the larger platinum deposits. This is first High Resolution Electron Energy Loss Spectroscopy observation of the ethylidyne species on alumina supported catalysts. (JG)
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.
