IR study of acrolein hydrogenation over Co/SiO2catalysts

Abstract

Gas-phase and surface spectra are reported for Co/SiO₂ exposed at 295 and 373 K, with and without hydrogen, to acrolein, propanal, allyl alcohol and propan-1-ol. Adsorbed species on silica, Co^o and oxidised Co sites with accompanying oxide ions are discussed in relation to the hydrogenation reactions of acrolein. The dominant reaction involved propan-1-ol formation via propanal. Providing that Co^o sites were present to dissociate hydrogen, hydrogenation of alkenyl groups in adsorbed species on silica or oxidised cobalt sites readily occurred but did not necessarily constitute a mechanism for product formation.