Synthesis of higher alcohols from CO 2 hydrogenation over a PtRu/Fe 2 O 3 catalyst under supercritical condition

Hydrogenation of CO2 to alcohols is of great importance, especially when producing higher alcohols. In this work, we synthesized heterogeneous PtRu/Fe2 O3 , in which the Pt and Ru bimetallic catalysts were supported on Fe2 O3 . The catalyst was used to catalyse CO2 hydrogenation to alcohols. It was demonstrated that the activity and selectivity could be tuned by the bimetallic composition, and the catalyst with a Pt to Ru molar ratio of 1:2 (Pt1 Ru2 /Fe2 O3 ) had high activity and selectivity at 200°C, which is very low for heterogeneous hydrogenation of CO2 to produce higher alcohols. The conversion and the selectivity increased with increasing pressures of CO2 and/or H2 . The catalyst could be reused at least five times without any obvious change in activity or selectivity.