Mechanochemical synthesis of double vanadate in Cu–Fe–V–O system and its physicochemical and catalytic properties

摘要: Abstract Mechanochemical synthesis has been successfully employed to prepare a Cu3Fe4(VO4)6 powder. The formation of designed compound (in α-polymorphic form) is due the reactions copper, iron and vanadium oxide precursors which were activated by high-energy ball milling (Activator 2S, Novosibirsk, Russia) for 8 h instead heat energy required in conventional multi-stage high-temperature process during 80 h forming β-polymorphic form. Catalytic properties compound, prepared two different mentioned above techniques, tested methanol steam reforming reaction are satisfactory closely same. However, α-, as well as, forms structural unstable form metallic copper beside V2O3 oxides, probably catalyze simultaneously undesired methanation reaction. real chemical mechanism still not clear.