Abstract
The kinetic peculiarities of CO oxidation on WO3 promoted with Pt or Pd were studied. In the region of low catalyst activity (the degree of CO conversion below 20%), the reaction was found to be zero-order in CO and first-order in oxygen. In the high-activity region (CO conversion above 95%), the reaction order was first with respect to CO and zeroth with respect to oxygen. Hysteresis phenomena were observed for the r − c(O2) and r − c(CO) dependences at certain temperatures. A reaction scheme combining the heterogeneous and heterogeneous-homogeneous mechanisms was suggested.
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Original Russian Text © V.V. Lesnyak, E.V. Ishchenko, I.N. Gut, A.V. Yatsimirskii, O.Yu. Boldyreva, 2007, published in Zhurnal Fizicheskoi Khimii, 2007, Vol. 81, No. 6, pp. 1006–1009.
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Lesnyak, V.V., Ishchenko, E.V., Gut, I.N. et al. The kinetic patterns of CO oxidation on WO3 promoted with Pt or Pd. Russ. J. Phys. Chem. 81, 874–877 (2007). https://doi.org/10.1134/S0036024407060076
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DOI: https://doi.org/10.1134/S0036024407060076