Gopinath, Chinnakonda S. ; Thirunavukkarasu, Kandasamy ; Nagarajan, Sankaranarayanan (2009) Kinetic evidence for the influence of subsurface oxygen on palladium surfaces towards CO oxidation at high temperatures Chemistry - An Asian Journal, 4 (1). pp. 74-80. ISSN 1861-4728
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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/asia.20...
Related URL: http://dx.doi.org/10.1002/asia.200800278
Abstract
Transient state kinetics of the catalytic oxidation of CO with O2 on Pd-surfaces has been measured under isothermal conditions by using a molecular beam approach. Systematic studies were carried out as a function of reaction temperature and CO+O2 composition. With sufficient kinetic evidence, we have demonstrated the positive influence of subsurface oxygen towards CO-adsorption and oxidation to CO2 at high temperatures (600-900 K) on Pd-surfaces, and the likely electronic nature of the surface changes with oxygen in the subsurface. These studies also provide a direct proof for CO-adsorption with a significantly reactive sticking coefficient at high temperatures on Pd-surfaces exhibiting a significant subsurface O-coverage.
Item Type: | Article |
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Source: | Copyright of this article belongs to John Wiley and Sons. |
Keywords: | Adsorption; Kinetics; Oxidation; Palladium; Surface Analysis |
ID Code: | 61919 |
Deposited On: | 15 Sep 2011 12:16 |
Last Modified: | 15 Sep 2011 12:16 |
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