Collect. Czech. Chem. Commun. 1982, 47, 1290-1300

X-ray diffractograms and IR spectra of modified vanadium-phosphate catalysts

Milan Brutovský, Štefan Gerej, Fedor Vasilco and Judita Gerejová

Department of Physical Chemistry, Šafárik University, 041 67 Košice


Structure of vanadium-phosphate catalysts (V : P = 1 : 1.2) modified by addition of Li, Ba, Mn, Fe, Co, Ni, Cu, Zn, Pd, Cd, Sn or Ce has been studied by X-ray diffractometry and IR spectroscopy. Dimension of particles is diminished, and degree of arrangement of structure of the contact catalyst is lowered in the presence of the additives as compared with the non-modified catalyst, which can be explained by incorporation of these additives (except for Pd) in the lattice of the basic catalyst. Crystalline phase (VO)2P2O7 has been found in all the catalysts besides the cyclic anion P4O124-; the non-modified and the Ba-containing catalysts contain also the compound VO(PO3)2.