Determination of the Kinetic Parameters for the Electroreduction of c 6 0 by Scanning Electrochemical Microscopy and Fast Scan Cyclic Voltammetry 20 1
نویسندگان
چکیده
The electroreduction of the fullerene Cm in 1,2-dichlorobenzene (ODCB) and benzonitrile (PhCN) at a Pt electrode was studied by using scanning electrochemical microscopy and fast scan cyclic voltammetry. The former technique was employed for steady-state measurements in a thin-layer cell formed by an ultramicroelectrode tip and mercury pool substrate. The standard heterogeneous rate constants found in both solvents, 0.46 cm/s (ODCB) and 0.12 cm/s (PhCN), appeared to be lower than one would expect for an uncomplicated outer sphere electron-transfer reaction, probably because solvation and ion pairing affect the reaction kinetics. The diffusion coefficient of c60 in ODCB depends strongly on supporting electrolyte (TBABF4)
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