Influence of the impregnation media on the catalytic properties of carbon-supported copper catalysts in NO reduction with CO

The role of organic media of impregnation on the catalytic activity of carbon-supported copper catalysts in NO reduction with CO was studied. The best activity possesses a catalyst prepared from methanol media. It was established a uniform disposition of the active phase on the surface and in the bulk of this catalyst. Large organic solvates hinder the deep penetration of the precursor molecules in the pores of the support and lead to formation of copper aggregates on the surface. The reduction of NO with CO on the catalyst prepared in methanolic media is assisted by the carbon support as an additional reducing agent.