The effect of Cu species on the chemical state of Mo in the Mo/CuH-ZSM-5 catalyst for methane non-oxidative aromatization

The catalytic performance of Mo/CuH-ZSM-5 was compared with that of Mo/H-ZSM-5 for methane aromatization in the absence of oxygen. The Cu ions acted as promoters, and the activity and stability of catalysts for methane aromatization were enhanced to some extent. The fresh and reacted catalysts was studied by XRD, ESR and XPS methods, and it is found that by the addition of Cu species, the reduction of MoO3 was suppressed and the Cu species itself was reduced. It is supposed that the Mo species with a higher oxidative state is responsible for the activation and conversion of methane