Silver-plated graphite electrodes were prepared by the absorption method and its surface structure was characterized by SEM assembled with energy dispersive spectrometer.The electrochemical behavior of Sulfur Black 2BR 200% on graphite and silver-plated graphite was studied with linear sweep voltammograms.Experimental results showed that metal silver was successfully coated on the surface of graphite and silver-plated graphite electrode gave higher current and showed better catalytic property for the reduction of Sulfur Black 2BR 200%.In addition

the rate of reduction reaction of Sulfur Black increased with increasing pH of electrolyte.The electrolysis experiments were performed by using graphite and silver-plated graphite cathodes respectively.Excellent current efficiency (92.2%) was obtained in the following reaction condition: silver-plated graphite used as cathode，temperature（27±2）℃

current density 6.25 mA8226;cm-2，pH of electrolyte 14.