was swept using a EG&G Model 273 Galvanostat/Potentiostat at a scan rate of 0.167mV s−1 from the initial potential of−200 mV versus open circuit potential (OCP) to the final potential of 600 mV versus OCP
wasswept using a EG&G Model 273 Galvanostat/Potentiostat at a scan rateof 0.167mV s−1 from the initial potential of−200 mV versus open circuitpotential (OCP) to the final potential of 600 mV versus OCP