Carbon samples CMK-3, YP-80F, and BP-1300 were synthesised by modifying our previously published procedure. Briefly, A solution of activated carbon (0.1 g, 1 equiv.) and 2aminoanthraquinone (0.56 g, 0.3 equiv., 2-AAQ) was stirred in degassed acetonitrile for 16 hours. Tert-butyl nitrite (0.77 g, 3 equiv. compared to 2-AAQ) was added, and the suspension was stirred under N2 for 4 hours. The powder was then washed under suction with acetonitrile and DMF (400 mL) and dried in a vacuum oven at 90 ° C for 12 hours. The three carbon samples were chosen to have a range of different pore size distributions.