Cocation Effect in Catalytic Property of Copper Ion-Exchanged ZSM-5 Zeolites for the Direct Decomposition of Nitrogen Monoxide

The coexistence of metal cations such as alkaline earth and transition metal cations with Cu ions in ZSM-5 zeolites promoted the catalytic activity of Cu ion for the direct decomposition of nitrogen monoxide at temperatures above 450 °C. The promotion effect was found to depend on the ion exchange mode.