Infrared spectroscopic study of methanol adsorption on chromium ortho-vanadate

Methanol adsorption has been studied in static conditions on a trained and oxidized surface of chromium orthovanadate. It is shown that on the trained surface methanol adsorption is accompanied by the appearance of methoxyl structures with the absorption band of 1060 cm-1, which transform themselves into formiate structures at increasing temperature. Methanol adsorption on the oxidized surface also reveals methoxyl structures, but with the absorption band of 1070 cm-1, and, besides, carbonate structures and formaldehyde emerge there. The interaction of CH3OH+O2 mixture with the sample trained surface leads to the disappearance of absorption bands from the spectrum, the band characterizing oxidized complexes, and also to the presence of considerable quantities of formaldehyde and its desorption products