Synthesis and XPS characterization of a novel aluminovanadate oxynitride basic catalyst: influence of nitridation temperature

The influence of nitridation temperature on aluminovanadate catalyst synthesized by coprecipitation has been studied by XPS. This work presents the change in the vanadium environment (from the emission V2p(3/2)) and the evolution of the nitrogen multi-components signal (from the emission N1s). The results show that vanadium is present in the oxynitride in two forms: a reduced oxidation state VOx and a nitride V3+ species and that nitride nitrogen appears from 773 K.