Temperature Hysteresis in Oxidation of CO on Complex Oxide Catalysts |
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| Authors: | E V Ishchenko V K Yatsimirskii S V Gaidai |
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| Institution: | (1) Taras Shevchenko Kyiv National University, Vul. Volodymyrs'ka 64, 01033 Kyiv, Ukraine |
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| Abstract: | We have used thermal desorption (TD) with mass spectrometric detection of the desorbed species to study the state of the surface
of oxide catalysts for oxidation of CO. Detection of weakly bound forms of water and the species H3O+ and HO
2
⋅
in the thermal desorption spectra correlates with the existence of temperature hysteresis in these samples. The data obtained
are explained by the reaction occurring in a highly active state via a heterogeneous-homogeneous mechanism, and also by the
effect of local superheating.
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Translated from Teoreticheskaya i Eksperimental'naya Khimiya, Vol. 41, No. 5, pp. 323–327, September–October, 2005. |
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| Keywords: | oxidation of carbon monoxide catalyst transition metal oxides hysteresis |
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