1 Department of Chemical and Biochemical Engineering, Technical University of Denmark2 CHEC Research Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark3 Karlsruhe Institute of Technology
Flame spray pyrolysis (FSP) of Bi(III)-and Mo(VI)-2-ethylhexanoate dissolved in xylene resulted in various nanocrystalline bismuth molybdate phases depending on the Bi/Mo ratio. Besides alpha-Bi2Mo3O12 and gamma-Bi2MoO6, FSP gave direct access to the metastable beta-Bi2Mo2O9 phase with high surface area (19 m(2) g(-1)). This phase is normally only obtained at high calcination temperatures (>560 degrees C) resulting in lower surface areas. The beta-phase was stable up to 400 degrees C and showed superior catalytic performance compared to alpha- and gamma-phases in selective oxidation of propylene to acrolein at temperatures relevant for industrial applications (360 degrees C).
Chemical Communications, 2014, Vol 50, Issue 97, p. 15404-15406
CHEMISTRY,; SURFACE-AREA; GAMMA-PHASE; BETA-PHASE; OXIDE; NANOPARTICLES; BI2MO3O12; KINETICS; SYSTEM