Characterization of active sites on Rh/SiO2model catalysts

Autor:	Zihao Zhou, D. W. Goodman, Sean M. McClure, M. Lundwall, Fan Yang
Rok vydání:	2009
Předmět:	Chemistry Kinetics Analytical chemistry chemistry.chemical_element Condensed Matter Physics Catalysis law.invention Rhodium Chemical kinetics Adsorption law Desorption General Materials Science Particle size Scanning tunneling microscope
Zdroj:	Journal of Physics: Condensed Matter. 21:474223
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/21/47/474223
Popis:	Rh/SiO(2) model catalyst surfaces are prepared under ultra-high vacuum conditions and examined in situ using scanning tunneling microscope and CO infrared reflection absorption techniques, to quantify the number and kinds of active Rh surface sites available for kinetic reaction (CO oxidation) as a function of Rh particle size. The results are compared against CO desorption measurements and elevated pressure CO oxidation reaction kinetics, to evaluate the extent of the correlation between the low and elevated pressure site characterization techniques. Data demonstrate that estimates of Rh active sites exhibit good agreement between the characterization methods and illustrate the utility of low pressure surface science characterization techniques in understanding elevated pressure reaction kinetics on model catalyst surfaces.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f049278ed49577d7198a7fd83c75816 https://doi.org/10.1088/0953-8984/21/47/474223 Zobrazit plný text záznamu