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A mechanistic study of nitrous oxide adsorption and decomposition on zirconia

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Abstract

FT-IR spectroscopy and mass spectrometry have been used to study the adsorption and decomposition of nitrous oxide on zirconia. It was determined that zirconia cations in the 4+ oxidation state are the site for molecular adsorption of N2O, whereas Zr3+ sites are active toward dissociative adsorption of N2O at temperatures as low as 25°C. Catalytic decomposition of N2O on ZrO2 occurs at temperatures above 350°C and follows first-order reaction kinetics. Experiments utilizing isotopic labeling in conjunction with mass spectrometry were done to elucidate the details of the reaction mechanism. Based on the results presented here, a mechanism for N2O decomposition on ZrO2 is proposed.

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Authors
  1. T.M. Miller
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  2. V.H. Grassian
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Miller, T., Grassian, V. A mechanistic study of nitrous oxide adsorption and decomposition on zirconia. Catalysis Letters 46, 213–221 (1997). https://doi.org/10.1023/A:1019058232683

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