电化分解法是向溶解有被分解对象物质的水溶液施加一定的电压，在阳极和阴极之间产生一股电流，从而使被分解对象物质在阳极发生氧化反应，而在阴极发生还原反应, 最终分解成无害物质的一种方法。电化分解法的关键是电极材料，要求电极具有能产生强氧化性活性氧（O2 -）或自由羟基（OH）的电极电位，并在此电位下电极材料不发生溶解。

H2O→OH・ + H+ + e-（阳极）

OH ・ + COD → CO2+H2O（阳极表面附近）

H2O + e- → 1/2H2 + OH-（阴极）

表 各种阴极材料的氧产生电位

电极材料性能要求：

1) 导电性好、氧气发生电位高。

2) 具有选择性电解催化氧化功能。

3) 与基质材料(Ti等)的结合性好，不易脱落。

4) 耐化学腐蚀，寿命长，成本低。

The electrochemical decomposition method is to apply a certain voltage to an aqueous solution in which the substance to be decomposed is dissolved, and an electric current is generated between the anode and the cathode, so that the substance to be decomposed undergoes an oxidation reaction at the anode and a reduction reaction at the cathode, and finally decomposes. A way to become harmless substances. The key of the electrochemical decomposition method is the electrode material, which requires the electrode to have an electrode potential that can generate strong oxidizing active oxygen (O2 -) or free hydroxyl (OH), and the electrode material does not dissolve at this potential.

Electrode material performance requirements:

1) Good conductivity and high potential for oxygen generation.

2) It has the function of selective electrolytic catalytic oxidation.

3) It has good bonding with the matrix material (Ti, etc.), and it is not easy to fall off.

4) Chemical resistance, long life and low cost.