According to Figure 4C, theoretical calculations show one of two extremes (i.e. all electrons added in second cell or no (minimal) electrons added in second cell) show the greatest efficiency with a given set of applied potentials. This varies as a result of the carbon to electron ratio as seen in equation (8). Hence there are multiple products mentioned in specific electron requirements, such as propanol/methanol for 0 additional electrons and formaldehyde/acetate for 8 additional electrons.