不同因素对三维电极体系电极电位的影响

反应器采用颗粒状活性炭为填料，中间位置添加隔膜，研究了不同条件下三维电极体系电极电位的分布规律及其影响因素．结果表明，三维电极阴极和阳极区靠近隔膜处的电极电位绝对值明显高于靠近两极处的电极电位，且阴极和阳极区电极电位绝对值都随外加电压的增大而上升．阴极板材料性质决定了阴极板电极电位的高低：阴极板材料还原性能愈强，其极板电极电位负值绝对值愈大；阴极板材料还原性能愈弱，其极板电极电位负值绝对值愈小．不同厚度隔膜处理不会影响极板电极电位高低，也不会影响阳极反应区电极电位大小，但能提高三维电极体系还原区的还原能力．与低浓度的反应溶液相比不仅提高了阴极反应区电极电位，还能影响极板电极电位的高低．

Effects of Different Factors on Electrode Potential of Three-Dimensional Electrode System

Electrode potential distribution and influencing factors of anode, cathode and reaction area in a three-dimensional electrode reactor, which contained a cylindrical packing of soaked granulated active carbon sandwiched with septum in the middle, was studied to obtain basic knowledge of electrochemical reactor. The results show that the electrode potential of reaction area near septum place is obviously higher than that near (anode) and cathode. The absolute value of potential in the three-dimensional electrode evidently increases with the levels of applied voltage. The characteristics of cathode electrode material determine cathode electrode (potential). It means that the higher the reducing power of cathode material is, the more the electrode potential is; vice versa. The treatment of thickening septum can improve the reducing power of three-dimensional (electrode) reducing area but cannot impact electrode potential of anode electrode, cathode electrode and anode reaction area. The lower concentration of reaction solution not only improves the electrode potential of negative reaction area but also affects the electrode potential of electrode.