Sean M McClure et al 2009 J. Phys.: Condens. Matter 21 474223 doi:10.1088/0953-8984/21/47/474223
Characterization of active sites on Rh/SiO2 model catalysts
Sean M McClure, M Lundwall, F Yang, Z Zhou and D W Goodman1
Show affiliationsRh/SiO2 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.
- PACS
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82.65.+r Surface and interface chemistry; heterogeneous catalysis at surfaces
68.37.Ef Scanning tunneling microscopy (including chemistry induced with STM)
82.80.Dx Analytical methods involving electronic spectroscopy
82.20.-w Chemical kinetics and dynamics
- Subjects
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Condensed matter: electrical, magnetic and optical
- Dates
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Issue 47 (25 November 2009)
Received 19 May 2009
Published 5 November 2009
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Characterization of active sites on Rh/SiO2 model catalysts
Sean M McClure et al 2009 J. Phys.: Condens. Matter 21 474223
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