Abstract
The surface modification by ammonium molybdate was conducted on the aluminium supported platinum catalysts. The NOx purification activity by using hydrogen as a reducer (H2-SCR) was well improved by such surface modification to show 70% of N2 conversion. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) revealed that ammonia intermediate species generated during the reaction stably adsorbed at Brønsted acid sites generated by the surface modification. The present H2-SCR for NOx proceeds like NH3-SCR, resulting in the high N2 selectivity.
