Characterization of MeAPO-11s synthesized conventionally and in the presence of fluoride ions and their catalytic properties in the oxidation of ethylbenzene

MeAPO-11 (Me = Co, Mn or V) samples have been synthesized conventionally an d in the presence of fluoride ions. Excellent incorporation of metal into t he framework has been achieved by synthesizing MeAPO-11 in the presence of fluoride ions. In spite of their larger crystallite size, MeAPO-11s obtaine d from fluoride route are more active in the oxidation of ethylbenzene. The complete change in oxidation state of vanadium from lower valence state (I V) to higher valence state (V) during calcination is observed in VAPO-11. T he redox behavior of MeAPO-11 has a potential influence on the catalytic ac tivity during the oxidation of ethylbenzene. VAPO-11, which has significant redox behavior, is most active. (C) 1999 Elsevier Science B.V. All rights reserved.