Electrocatalytic degradation kinetic of 4-chlorophenol by the Pd/C gas-diffusion electrode system.

Abstract

A Pd/C gas-diffusion cathode which generated H2O2 through a two-electron reduction process of fed oxygen molecule was used to degrade 4-chlorophenol in an undivided electrolysis device. The kinetics of 4-chlorophenol degradation has been investigated by the electrochemical oxidation processes. By inspecting the relationship between the rate constants (k) and influencing factors, using first-order kinetics to describe the electrochemical oxidation process of 4-chlorophenol, a kinetic model of 4-chlorophenol degradation process was proposed to calculate the 4-chlorophenol effluent concentration: C = C0 exp( -3:76 × 10(-6) C(-0.5)0 J(2) M(-0.7) Q(0.17) Dt). It was found that the electrocatalytic degradation rate of 4-chlorophenol was affected by current density, electrode distance, air-feeding rate, electrolyte concentration and initial 4-chlorophenol concentration. The kinetics obtained from the experiments under corresponding electrochemical conditions could provide an accurate estimation of 4-chlorophenol effluent concentration and lead to better design of the electrochemical reactor.

DOI: 10.2166/wst.2013.069

Cite this paper

@article{Bian2013ElectrocatalyticDK, title={Electrocatalytic degradation kinetic of 4-chlorophenol by the Pd/C gas-diffusion electrode system.}, author={Ziyao Bian and Y T Bian and Huijun Wang and Lie Meng Pang and A Z Ding}, journal={Water science and technology : a journal of the International Association on Water Pollution Research}, year={2013}, volume={67 8}, pages={1873-9} }