Two key technical challenges will be addressed: Construction of binuclear-CO2 complexes with CO2-CO2 spatially close enough to each other and activation of binuclear-CO2 complexes to release oxygen by electrochemistry (oxidation or reduction). Our goal is to pursue a molecular-based catalyst to attach and activate multiple CO2 molecules to release O2 after the application of external energy. The CO2 conversion to O2 technology would provide an effective approach to recycle CO2 from the terrestrial atmosphere and offer great promise for climate control. In addition, binuclear complex systems could convert CO2 to hydrocarbons with two or more carbon atoms and open a route for the production of fuels from the vast CO2 supply. This technology would change the future energy landscape and mark the beginning of a green energy age.