Cu, Co, Ag-containing pillared clays as catalysts for the selective reduction of NOx by hydrocarbons in an excess of oxygen

Thermally stable Al- and Zr-PILC loaded with copper and cobalt cations and silver nanoparticles were synthesized. The structural and surface features of these nanosystems were studied and compared with those of bulk analogs-p artially stabilized ZrO2 loaded with the same active components. Specificit y of the catalytic properties of nanocomposites in SCR of NOx by propane, p ropylene and decane in the excess of oxygen appears to be determined both b y distribution of active components on the catalytic surface and degree of their interaction with supports. Formation of ads.-NOx nitroxyl-hydrocarbon CxHyNO((2))over dot and isocyanate NCO intermediates was observed by ESR a nd IR spectroscopy in situ.