CO2 can be reduced to several C1 products like CO or HCOOH, HCHO, CH3OH and CH4 which vary in the number of electrons and protons transferred to CO2. Thethermodynamic driving forces for all these nH+/ne- reductionsfall within a narrow range with the 2e-/2H+ reduction being most energy demanding. This, along with a similar reduction potential for H+ reduction, makes attaining selectivity for a single product difficult to attain under electrocatalytic conditions. Factors like hydrogen bonding, electrostatic interactions and spin states have been proposed to affect the selectivity of 2e-/2H+ reduction and will be briefly discussed. The lecture will detail the newest developments from this laboratory in obtaining selective reduction of CO2 to CH3OH and CH4. It will focus on the mechanism of these reaction via identifying the intermediates using in-situ spectro-electrochemistry and parallel chemical preparation of these species followed by their spectroscopic characterization. The mechanism discovered thus far reveals that the product of CO2reduction can be generally controlled by regioselective protonation of these CO2 derived intermediates involved. In fact, these intermediates can also be used to methylate organic molecules and even form C-C bonds to result in C2 products like ethane selectively.