Bibliogr. s. 937

Effective catalysts for the low-temperature process of selective catalytic reduction of NO with ammonia (NH_{3}-SCR) were obtained by deposition of copper species on MCM-41 using template ion-exchange method (TIE). It was shown that the form and aggregation of deposited copper species depend on concentration of copper salt (CuCl_{2}) solution and solvent composition used for TIE procedure. In the case of methanol solution of CuCl_{2} copper in the highly dispersed form, mainly monomeric species, was deposited on the silica support, while in the case of water containing solutions of CuCl_{2} more aggregated CuO species were formed. The efficiency in deposition of highly dispersed copper species was significantly improved by treatment of the MCM-41 samples with ammonia directly after TIE procedure. In this case nearly 13 wt.% of copper was deposited on MCM-41 nearly exclusively in the form of monomeric cations. The catalysts obtained by this method presented high activity, selectivity to N_{2} and stability in the low-temperature (200–300 ^{\circ}C) NH_{3}-SCR process.