If the tendency of the electrode is to get reduced, the potential difference between the electrode and electrolyte
Reduction potential
Reduction potentialis a measure of the tendency of achemical speciesto acquire electronsand thereby bereduced. Reduction potential is measured involts(V), or millivolts (mV). Each species has its own intrinsic reduction potential; the more positive the potential, the greater the species' affinity for electrons and tendency to be reduced.