![]() In this paper, we report a highly active and highly selective hybrid oxide catalyst composed of manganese oxide nanoparticles (NPs) supported on a mesoporous cobalt oxide support for the production of methanol under mild pressure and temperature conditions. However, there is yet no chemically, catalytically and economically viable substitute for Cu such as to hydrogenate CO 2 to methanol in high yields. More recently, a Ni–Ga heterogeneous catalyst was reported as an alternative to the traditional Cu/ZnO/Al 2O 3 methanol synthesis 7. Heterogeneously, Cu/ZnO supported in Al 2O 3 catalyses methanol synthesis with selectivity greater than 50% via hydrogenation of CO 2 at high pressures (>20 bar) 16. Even nonmetal Lewis pairs have been successfully implemented as phase-transfer catalysts to solubilize and reduce CO 2 (refs 14, 15). Homogeneous systems have been demonstrated, such as iridium catalysts for use in basic aqueous media at elevated pressure 11, or ruthenium-based single-site organometallic catalysts for hydrogenation of supercritical CO 2 to make formic acid 12, 13. Electrocatalytic and photo-electrocatalytic routes show promise however, selective reduction of CO 2 to methanol with a low overpotential is difficult 8, 9, 10. It is an easily transportable fuel fuel cell technology already exists (direct methanol fuel cells) and it can be used as a precursor for many valuable chemical intermediates.Ī number of catalytic and electrocatalytic reaction schemes over various catalysts have been documented for the hydrogenation of CO 2 (refs 3, 4, 5, 6, 7). To demonstrate the industrial applicability, the catalyst is also run under high conversion regimes, showing its potential as a substitute for current methanol synthesis technologies. Through control experiments, we find that the catalyst’s chemical nature and architecture are the key factors in enabling the enhanced methanol synthesis and ethylene production. We document the existence of an active interface between cobalt oxide surface layers and manganese oxide nanoparticles by using X-ray absorption spectroscopy and electron energy-loss spectroscopy in the scanning transmission electron microscopy mode. In addition, carbon–carbon bond formation is observed through the production of ethylene. Here we report the discovery of a hybrid oxide catalyst comprising manganese oxide nanoparticles supported on mesoporous spinel cobalt oxide, which catalyses the conversion of carbon dioxide to methanol at high yields.
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