Fig. 4. Fifty-fold repetition of the experiment of Fig. 2a with the timing diagram (duration of the laser flashes not drawn to scale) shown below the plotted first and last set of concentration traces for OER (upper trace, green) and eaq˙– (lower trace, blue). The inset displays the concentrations of these two species immediately after each fifth flash as functions of the flash number, using the same colour code as in the traces. Experimental conditions are given in the caption of Fig. 2a; for further information, see text.
