The toxic organochlorine compounds generated in pulp chlorine-containing bleaching have strong damages to environment. In order to resolve this problem and make paper industry in sustained growing, the new elemental chlorine free bleaching (ECF) and totally chlorine free bleaching (TCF) technology must be developed. The electrochemically mediated delignification (E_M) is one of new pulp bleaching methods. To find proper electrodes with high efficiency, high catalysis performance and mediators with high effi...