Co2+/ Co(0) redox couple revealed by EPR spectroscopy triggers preferential coordination of reactants during SCR of NOx with propene over cobalt-exchanged zeolites.
Catalytic reduction of NOx with propene over Co2+ -exchanged beta and ZSM-5 zeolites occurs with formation of zero-valent cobalt; NOx preferentially adsorbed on Co2+ plays the role of a metal reducing agent while ligation of propene is favored for Co(0) centers.
Pietrzyk
Piotr
P
Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland. pietrzyk@chemia.uj.edu.pl
Sojka
Zbigniew
Z