Capturing and recycling of CO2 are among the most important chemical and engineering challenges facing humankind. 1 CO2 as a starting material is a thermodynamically and chemically stable molecule under standard conditions. However, these materials can react with other chemical feedstocks under certain reaction conditions (pressure, temperature, catalysis, etc.) to produce value-added commodity chemicals. Thus, CO2 is an ideal C1 building block for organic synthesis because it is inexpensive and abundant and can be considered a waste product. One of those value-added products obtained from CO2 is cyclic carbonates, which can be used industrially as a polar aprotic solvent, 4 as an electrolyte for lithium-ion batteries, 5 and as intermediates in the manufacture of fine chemicals 6 and polymers. Cyclic carbonates are mostly produced by the cycloaddition of CO2 to epoxides in the presence of a wide range of catalysts, 8 including hydrogen-bond catalysts, 9 ionic liquids, 10 quaternary ammonium salt, 11 organic polymers, 12 MOFs, 13 porous materials, 14 layered double hydroxide (LDH) 15 and metal-based catalysts. Considering that the use of mild reaction conditions remains the principal challenge, we propose the use of mixed metal oxides (MMOs) as catalysts in cycloaddition reactions, with the objective of being able to carry out the catalytic process under atmospheric CO2 pressure and moderate temperature. 17