Catalytic Reactions of NO over 07 mol% Ba/MgO Catalysts Academic Article uri icon


  • A series of catalysts composed of barium oxide supported on magnesium oxide with Ba loadings up to 7 mole % was studied for NO and N2O decomposition. The rate of N2O decomposition was much greater than that of NO decomposition so that the selectivity for N2 formation approached 100% at > 700C. The kinetics of the reaction (second-order in NO and negative-order in O2) was consistent with an Eley-Rideal mechanism, in which the rate-limiting step involved the reaction of gas-phase NO with an N-containing surface intermediate. The N2 selectivity in NO decomposition products over a 4 mole % Ba/MgO catalyst increased with increasing temperature. N2 was formed during NO decomposition via the decomposition of N2O over a 4 mole % Ba/MgO catalyst. The role of N2O as a reaction intermediate in NO decomposition was confirmed by the results of a separate experiment in which the space velocity of the 4% NO reagent was varied.

published proceedings

  • Journal of Catalysis

author list (cited authors)

  • Xie, S., Rosynek, M. P., & Lunsford, J. H.

citation count

  • 67

complete list of authors

  • Xie, Shuibo||Rosynek, Michael P||Lunsford, Jack H

publication date

  • November 1999