The reference electrode can be used as long as its electrode potential remains unchanged, and Pt electrode is generally used as the auxiliary electrode. The hub is the working electrode, the working electrode should be based on your electrochemical research object, if the use of electrolysis, generally use large-area Pt network, separation or purification can be used large-area Hg cathode; If used for voltammetry research, can choose a variety of retouching electrode, enzyme electrode, etc.