Fig. 4: Evolution of reactants and turnovers of different reaction pathways.

The catalyst temperature (a) is shown alongside the partial pressures calculated from the APXPS curve fit (b) together with those calculated from the MS (c). The time-resolved selectivity (c.f. (e)) within the total conversion is calculated and shown as a stacked plot (d) in which the colors refer to the reaction equations in (e). The vertical dashed lines indicate the beginning and end of the O-MTL.