Degradation of 4-Chlorophenol Using a Pd/MWNTs Gas Diffusion Electrode

Abstract:

In a diaphragm electrolyze system with a Ti/RuO₂/IrO₂ anode and the Pd/MWNTs gas diffusion cathode, the degradation of 4-chlorophenol was fully studied by the electrochemical reduction and the simultaneous oxidation of the cathode and anode. The results indicated that the optimization electrolyte concentration is 0.08 mol/L. The Cl- removal reached 94.8% after 80 min electrolysis with H2 feeding. After 120 min electrolysis, the removal of 4-chlorophenol in the anodic and cathode compartments were 98.5% and 90.6%, respectively. Additionally, the TOC removal reached 65% and 70% in the anodic and cathodic compartment respectively after 140 min. By the UV scanner analysis of the electrolyte, the 4-chlorophenol and benzoquinone were oxidized by the oxides formed on the cathode, while the benzoquinone was found accumulated in the anodic compartment.

• Periodical: Advanced Materials Research (Volumes 356-360)
• Pages: 1323-1326
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.356-360.1323
• Online since: October 2011
• Authors: Xiang Jia Wei, Hui Wang, Zhao Yong Bian, Guang Lu
• Keywords: 4-Chlorophenol, Catalytic Cathode, Electrochemical Oxidation, Pd/MWNTs, Priority Pollutants

References

[1] K. Rajeshwar, J.G. Ibane and G.M. Swain: J. Appl. Electrochem. Vol. 24 (1994), p.1077

[2] J.F. Zhi, H.B. Wang and T. Nakashima: J. Phys. Chem. B Vol. 107 (2003), p.13389

[3] A. Hirvonen, M. Trapido, J. Hentunen and J. Tarhanen: Chemosphere Vol. 41 (2000), p.1211

DOI: 10.1016/s0045-6535(99)00548-2

[4] G. Chen, Z.Y. Wang and D.G. Xia: Electrochim. Acta Vol. 50 (2004), p.933

[5] L. Calvo, M.A. Gilarranz, J.A. Casas, A.F. Mohedano and J.J. Rodriguez: Appl. Catal. B: Environ. Vol. 67 (2006), p.68

[6] H. Wang and J.L. Wang: Appl. Catal. B: Environ. Vol. 89 (2009), p.111