Fluorine interlayer doping activates neighboring carbon atoms, leads to a 250 000 times enhanced CO2-to-CO conversion, and suppresses the competitive H2 evolution. In their Communication on page 9640 ff., Q. Li, Y. Wang et al. report an efficiency of 13.5% for the conversion of solar to chemical energy, which was obtained using a hybrid solar-driven CO2-splitting cell based on a fluorine-doped carbon cathode and an Ir/C anode.