Undistorted Cyclic Voltammograms at Scan Rates up to 2.5 MV·s-1 through Positive Feedback Compensation of Ohmic Drop

摘要

A circuit based on the current feedback operational amplifier was constructed to accomplish on-line ohmic drop compensation in ultrafast cyclic voltammetry. Firstly, its characteristics were confirmed experimentally on dummy cells. Then the reduction of anthracene in acetonitrile, a classical test example with very fast electron-tratnsfer kinetics, was examined to prove them too. The results showed that this circuit could afford excellent ohmic drop if 5% error is tolerated.