Ceramic model catalysts of general formula Bi4V2-xSbxO11-delta are synthesised by solid-state reaction. X-ray diffraction shows the materials to be single phase over the composition range 0 less than or equal to x<0.3, with a second phase, which is not identified, produced at higher antimony doping level. XPS results show oxidation states of +IV and +V for vanadium in these compounds. These results also indicate that the proportion of antimony on the surface of the compounds is greater than that in the bulk of these compounds. The catalytic properties of the materials are examined using methanol oxidation as a test reaction. The activity and selectivity to formaldehyde production shown by these materials is found to be strongly correlated with the antimony doping level.