Decomposition of H2O2 at Dimensionally Stable Anode Electrodes and Its Effect on Aniline Oxidation

作者：Yang, Chu Yan^*; Bo, Yang; Yi, Qian; Li, Deng Xiao

来源：Environmental Engineering Science, 2011, 28(5): 317-323.

DOI：10.1089/ees.2010.0027

• electro-Fenton
• H2O2
• DSA electrode
• catalytic decomposition
• electrochemical oxidation
• aniline

In the electro-Fenton process, through the chemical efficiency of H2O2 a high degradation of organic pollutants can be obtained. In this work, the decomposition of H2O2 at dimensionally stable anode (DSA) electrodes coated with IrO2, RuO2, and TiO2 prepared by thermal decomposition was investigated under two conditions: (a) no potential and (b) different potentials externally imposed. Results showed that the composition of electrodes, pH, potential had significant effects on the decomposition of H2O2. Both higher pH and higher potential could accelerate the decomposition of H2O2. In the electrolysis system with the DSA electrodes, decomposition of H2O2 involved two mechanisms: catalytic decomposition and electrochemical oxidation. Additionally, it was found that catalytic decomposition of H2O2 at the DSA electrode was inconsequential to the oxidation of aniline, and electrochemical oxidation of H2O2 was only slightly helpful to the oxidation of aniline. As the destruction of H2O2 caused by the DSA electrodes cannot be neglected in the electro-Fenton process, this work suggests that using the appropriate anodes as well as reasonable potential will lead to more H2O2 consumed by the Fenton reaction, which is beneficial for the degradation of organic compounds.

• 出版日期2011-5
• 单位青岛科技大学