Optimization of ruthenium-containing, stabilized, nitric oxide reduction catalysts

  • Gandhi H
  • Stepien H
  • Shelef M
  • 5


    Mendeley users who have this article in their library.
  • 19


    Citations of this article.


To optimize the stabilized ruthenate catalysts for NOxreduction in automotive exhaust treatment with respect to selectivity and stability, we studied dilution of ruthenium in the ruthenates by Ni3+and Mn4+ions in presynthesized specimens and the effect of stabilizer content in sequentially impregnated specimens. The replacement of Ru in BaRuO3by Mn4+and in LaRuO3by Ni3+increases the stability of the ruthenates with respect to volatilization in oxidizing environments. An increase in the resistance to volatilization is also observed in impregnated samples with the increase in the content of stabilizing component. These effects are substantial in shifting the onset of volatilization by several hundred degrees centigrade upwards on the temperature scale. However, all of these stabilization improvements result in decrease in the desired selectivity. © 1975.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • H. S. Gandhi

  • H. K. Stepien

  • M. Shelef

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free