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Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/52AF71A8-1CEC-44B5-9E75-8B3D07050483 | - |
| Identifier | http://www.sciencedirect.com/science/article/pii/0021951794900337 | - |
| Identifier | https://doi.org/10.1016/0021-9517(94)90033-7 | - |
| Language | en | - |
| Extent | 13 pages | en |
| Title | In Situ controlled promotion of catalyst surfaces via NEMCA: the effect of Na on the Pt-catalyzed CO oxidation | en |
| Creator | Gentekakis Ioannis | en |
| Creator | Γεντεκακης Ιωαννης | el |
| Creator | Moggridge, G.D | en |
| Creator | Vayenas, Costas G | en |
| Creator | Lambert Richard M. | en |
| Publisher | Elsevier | en |
| Content Summary | It was found that the catalytic activity of Pt for CO oxidation can be markedly and reversibly affected by depositing polycrystalline Pt films on β″-Al2O3, a Na+ conductor, and applying external potentials to supply or remove Na to or from the Pt catalyst surface. The change in the rate of CO oxidation is typically 103-105 times larger than the rate of supply or removal of Na. The use of the β″-Al2O3 solid electrolyte supports permits precise in situ control of the Na coverage on the Pt surface. Sodium coverages of 0.02 cause up to 600% steady-state increase in the rate of CO oxidation under CO-rich conditions. The promoting effect is due to enhanced oxygen chemisorption on the Pt surface. Higher (>0.06) Na coverages poison the rate severely and reversibly due to the formation of a CONaPt surface complex. Rate oscillations can be reversibly induced or stopped and their frequency can be controlled by controlling the catalyst potential VWR and average work function eφ. | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2015-10-30 | - |
| Date of Publication | 1994 | - |
| Subject | CO oxidation | en |
| Subject | Catalysis | en |
| Bibliographic Citation | I. V. Yentekakis, G. Moggridge, C. G. Vayenas and R. M. Lambert, "In Situ controlled promotion of catalyst surfaces via NEMCA: The effect of Na on the Pt-catalyzed CO oxidation", J. Catal., vol. 146, no. 1, pp. 292-305, Mar. 1994. doi:10.1016/0021-9517(94)90033-7 | en |
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