Synthesis of higher alcohols by CO hydrogenation over catalysts derived from LaCo1-xMnxO3 perovskites: Effect of the partial substitution of Co by Mn

Abstract LaCo1-xMnxO3 perovskites with different substitutions of Co by Mn were investigated as precursors of catalysts for the CO hydrogenation to produce higher alcohols. Characterization of LaCo1-xMnxO3 perovskites revealed modifications in their structure with the incorporation of Mn into the perovskite lattice affected the structure of the catalysts by reduction prior the reaction. The presence of Mn facilitated the production of alcohols and suppressed the formation of undesirable products, i.e., methane and methanol. Quantitative analysis showed that the catalysts derived from Mn-containing perovskites favored the formation of Co2C under the reaction conditions. Thereby the enhanced alcohol selectivity could be explained by the increment of Co2C/Co0 ratio. The results demonstrate that the catalysts originated from LaCo1-xMnxO3 perovskites are stable and effective for the synthesis of alcohols by CO hydrogenation.