Fig. 4. Plots of the current (black line) and charge (blue line) during bulk electrolysis of a solution containing 2 mM Ru(bpy)3(PF6)2, 31 μM IrO2 NPs and 4.3 mM buffer NaHCO3–Na2SiF6, in a water–ACN mixture (2.5 : 7.5 (v/v)). For comparison, the plot of charge during bulk electrolysis of 2 mM Ru(bpy)3(PF6)2 (blue dotted line) in dry acetonitrile was included. In each case the supporting electrolyte was 0.1 M TBAPF6. The electrode was RVC (for details see Experimental section).
