Citation: Jinli Yu, Tianfu Liu, Haiyue Liu, Yi Wang. Electro-polymerization fabrication of PANI@GF electrode and its energy-effective electrocatalytic performance in electro-Fenton process[J]. Chinese Journal of Catalysis, ;2016, 37(12): 2079-2085. doi: 10.1016/S1872-2067(16)62525-1 shu

Electro-polymerization fabrication of PANI@GF electrode and its energy-effective electrocatalytic performance in electro-Fenton process

Jinli Yu ^a, ,
Tianfu Liu ^b ,
Haiyue Liu ^b ,
Yi Wang ^b

a The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, China;
b School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, Guangdong, China

Received Date: 18 August 2016
Revised Date: 8 September 2016

Fund Project: This work was supported by the Sino-Greek Science and Technology Cooperation Project (2013DFG62590), the National Natural Science Foundation of China (21575299, 21576300, 21276290), Guangdong Province Nature Science Foundation (2014A030313150), and Guangzhou Science and Technology Plan Project (201607010104).

An energy-effective polyaniline coated graphite felt (PANI@GF) composite cathode for the elec-tro-Fenton (E-Fenton) process was synthesized through an electro-polymerization method. The electrocatalytic activity of the cathode for the 2e-ORR process was investigated and dimethyl phthalate (DMP) was used as a model substrate to evaluate its performance in the E-Fenton process. The as-prepared PANI@GF composite possessed a three-dimensional porous structure, which is favorable for O₂ diffusion, while the large amount of N atoms in the conductive polyaniline (PANI) enhanced 2e-ORR reactivity. The DMP degradation of the E-Fenton system using PANI@GF was significantly enhanced owing to the improvement in ORR performance. The apparent kinetic constant for DMP degradation was 0.0753 min^-1, five times larger than that of GF. The optimal carbonization temperature and polymerization time for the preparation of the PANI@GF composite cathode was found to be 900℃ and 1 h, respectively. Measurement conditions are a crucial factor for proper evaluation of cathode electrocatalytic performance. Accordingly, the O₂ flow rate, Fe²⁺ concentration, and pH for DMP degradation were optimized at 0.4 L/min, 1.0 mmol/L, and 3.0, respectively. These results indicate that the present PANI@GF composite cathode is energy-effective and promising for potential use as an E-Fenton system cathode for the removal of organic pollutants in wastewater.
- Electrocatalysis,
- Oxygen reduction reaction,
- Electro-polymerization,
- Electro-Fenton,
- Dimethyl phthalate degradation
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