G. Djegamariadassou et al., MODIFICATION OF THE SURFACE-COMPOSITION OF MOLYBDENUM OXYNITRIDE DURING HYDROCARBON CATALYSIS, Catalysis letters, 31(4), 1995, pp. 411-420
With an oxygen containing molybdenum nitride catalyst, the rate of hyd
rogenation of propylbenzene increases with time. This is attributed to
the carburization of surface during reaction. Both surface reactivity
in chemisorption and superficial chemical composition change during t
he activation of the catalyst.