Solvent Isotope Effect on Hydrogen-Transfer Reduction of CO2 into Formate with Glycerine by Alkaline Hydrothermal Reaction

To examine the solvent isotope effect on hydrogen-transfer reduction of CO 2 into formate with glycerine by alkaline hydrothermal reaction, intermediates were identified by 13 C-NMR, 1 H-NMR, 2 H-NMR, LC-MS analyses. The results showed that (1) CO 2 was indeed converted into abiogenic formate; (2) a ketone carbonyl group as intermediate product was formed on hydrogen-transfer reduction of CO 2 into formate with glycerine by alkaline hydrothermal reaction; (3) acetol was the most probable intermediate in the first reaction by undergoing a dehydration rather than a dehydrogenation.