Characterization of Tin Oxide Supported Vanadia & Molybdena Catalysts by Low Temperature Oxygen Chemisorption Technique

Abstract

Two series of SnO₂ supported V₂O₅ and MoO₃ catalysts prepared have been characterized by means of low temperature oxygen chemisorption and X-ray diffraction techniques. Oxygen uptake as a function of loading of V₂O₅ on V₂O₅ - SnO₂ catalysts increases linearly upto 3.2 wt. %  V₂O₅ and then decreases, whereas on MoO₃ - SnO₂ catalysts also oxygen uptake increases and reaches a maximum at 3 wt. % MoO₃ and thereafter remains constant. These results have been interpreted in terms of patchy monolayer models of V and Mo-oxide phases.