The number of CH4 molecules was derived from the CH3 + pulses, the CO2 consumption was determined as the difference between the numbers of pulsed and detected CO2 molecules per pulse (CO2,pulsed -CO2,released, light green symbols in Figure ). For the reaction products, we also present the amount of detected molecules in the first 15 pulses on an expanded time scale, where every pulse is plotted (see inset).