Figure 4. CV of tetramethyl-p-phenylenediamine. Black curve: DS 550 Pt electrode. Scan rates: 20, 30, 40, 50 mV/s yielding ΔEp 110 mV – 160 mV: quasi-reversible. Blue curve: DS 110 graphite electrode. Scan rates: 20, 30, 40, 50 mV/s yielding ΔEp 250 mV – 350 mV

From

Cyclic Voltammetry - A Versatile Electrochemical Method Investigating Electron Transfer Processes

N. Aristov, A. Habekost

World Journal of Chemical Education. 2015, 3(5), 115-119 doi:10.12691/wjce-3-5-2