Exploration of Optical, Redox, and Catalytic Properties of Vanadia-Mayenite Nanocomposites

The present paper continues the exploration of physicochemical and catalytic properties vanadia-mayenite composites. samples were prepared by an impregnation calcium aluminate Ca12Al14O33 (mayenite, C12A7) with a solution vanadium precursor. Pure mayenite V/C12A7 nanocomposites characterized Raman diffuse reflectance UV–Vis spectroscopies. reducibility was examined in temperature-programmed reduction experiments performed hydrogen atmosphere. performance vanadium-containing systems studied non-oxidative dehydrogenation ethane. As found, low-loaded sample (5%V/C12A7 sample) contains predominantly form Ca3(VO4)2, while for 10%V/C12A7 sample, two types vanadates (Ca2V2O7 Ca3(VO4)2) are registered. presence these phases defines spectroscopic characteristics redox nanocomposites. Both samples, 5%V/C12A7 10%V/C12A7, exhibit comparable activity, which is mainly connected amount Ca3(VO4)2 phase. uniqueness catalysts their excellent tolerance toward coke formation under reaction conditions.