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Catalysis Letters

, Volume 112, Issue 3–4, pp 181–186 | Cite as

Sol-gel Ag + Pd/SiO2 as a catalyst for reduction of NO with CO

  • Lachezar Radev
  • Mariana Khristova
  • Dimitar Mehandjiev
  • Biserka Samuneva
Article

Mono – (Ag/SiO2, Pd/SiO2) and bimetallic (Ag+Pd/SiO2) catalysts have been obtained via sol-gel method from tetra-ethoxy-silane (TEOS) and their activity in reduction of Nitric oxide (NO) with carbon monoxide (CO) has been investigated. The highest activity in the process of reduction of NO with CO possesses the sample Ag + Pd/SiO2. It has been found that the sol-gel method for preparation of bimetallic catalysts allows the formation of various catalytic active centers (CAC) which leads to high activity in reaction of NO reduction. The presence of Ag2O and PdO in these CAC allows the elimination of NO. The process of this elimination includes reduction of NO with CO at temperatures up to 200 оC as well as direct decomposition of NO at higher temperatures.

Keywords

sol-gel method catalysts NO reduction with CO catalytic active complex 

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Lachezar Radev
    • 1
  • Mariana Khristova
    • 2
  • Dimitar Mehandjiev
    • 2
  • Biserka Samuneva
    • 1
  1. 1.University of Chemical Technology and MetallurgySofiaBulgaria
  2. 2.Institute of General and Inorganic ChemistryBulgarian Academy of SciencesSofiaBulgaria

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