不同材料电极的制备及用于电化学介体脱木素的效果

分析了电化学介体脱木素体系用阳极电极的选择依据,选择制备了不同电极材料的多种阳极电极,并对各电极的电化学性能以及用于电化学介体脱木素的效果进行了研究。结果表明,电极材料的选择既要根据电极电位的高低,同时也要根据其催化性能的高低来进行。实验中所得各种涂层钛电极均存在相应的催化晶体或共溶体。其中Ti/SnSbOx/PbO2电极和Ti/SnSbOx/Pt电极的阳极电位最高,钌钛涂层电极、石墨电极、不锈钢电极和锡锑氧化物涂层电极次之,钛基二氧化锰电极阳极电位最低。不同电极材料具有不同的电化学介体脱木素效果。对于紫脲酸为介体的电化学介体脱木素体系而言,以具有中等电极电位的钌钛涂层电极的脱木素效果最好,催化活性最高。

Preparation of Different Material Anodes and Its Applieation in Electrochemically Mediated Delignification System

Different material anodes were selected and prepared on the basis of the requirements of electrochemically mediated delignification(EM) system,and the electrochemical properties and the electrochemically mediated delignification performance of the selected anodes were also investigated in this paper.The results showed that the selection of anode material must consider both electric potential and catalysis performance.All the prepared anodes in this paper had catalysis crystal.Among the electrodes,the electrodes of Ti/SnSbOx/PbO2 and Ti/SnSbOx/Pt had highest electric potential.The electrode of Ti/SnSbOx/MnO2 had lowest electric potential.Others had middle electric potential.Different material anodes had different electrochemical delignification performance.For violuric acid(VIO) mediated electrochemical delignification the electrode of Ti/RuTiOx had best catalysis performance.