“…There are some reviews related to this subject. (Leitner et al, 1998;Jessop et al, 2004;Himeda, 2007;Jessop, 2007;Federsel et al, 2010b;Wang et al, 2011) Besides formic acid, theoretically, CO2 can be hydrogenated to multiple compounds such as, formamides, formaldehyde, methanol, and methane (Eq 1). However, generation of these compounds typically require harsher conditions which make most homogeneous catalysts deactivating, increase the energy cost and make these reductions economically unfavourable.…”