Catalytic NO Decomposition Over Carbon Nanotubes Supported Cu–Mn

Abstract

The decomposition of nitric oxide (NO) was studied over carbon nanotubes (CNTs) supported Cu–Mn catalyst. CNTs were home-made by cracking of methane over the LaNiO3 catalyst. At the temperature of 500°C, 71.8% NO was decomposed into N2 (71% selectivity) with the by-products of NO2 and N2O (29% selectivity in total). X-ray photoelectron spectroscopy investigation found the existence of Mn3+ and Cu+ in Cu–Mn/CNTs, respectively. The NO temperature programmed desorption (NO-TPD) study indicated that the adsorption of NO resulted in the desorption of NO, NO2, N2O, N2, O2, and CO2. The apparent activation energy for NO decomposition over Cu–Mn/CNTs is 23 kcal/mol.