Citation: Qingyi Zeng, Sheng Chang, Mingqi Wang, Mi Li, Qinwen Deng, Zhu Xiong, Baoxue Zhou, Yanbiao Liu. Highly-active, metal-free, carbon-based ORR cathode for efficient organics removal and electricity generation in a PFC system[J]. Chinese Chemical Letters, ;2021, 32(7): 2212-2216. doi: 10.1016/j.cclet.2020.12.062 shu

Highly-active, metal-free, carbon-based ORR cathode for efficient organics removal and electricity generation in a PFC system

Qingyi Zeng ^{a, b, *,} ,
Sheng Chang ^{a, b} ,
Mingqi Wang ^b ,
Mi Li ^a ,
Qinwen Deng ^a ,
Zhu Xiong ^b ,
Baoxue Zhou ^c ,
Yanbiao Liu ^{d, **,}

a.
School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, China
b.
Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China
c.
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
d.
Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China

^**

qingyizeng@usc.edu.cn

yanbiaoliu@dhu.edu.cn

Received Date: 6 October 2020
Revised Date: 26 November 2020
Accepted Date: 31 December 2020
Available Online: 5 January 2021

Figures(4)

A highly-active, metal-free, carbon-based oxygen reduction reaction (ORR) cathode, i.e., graphitized N-doped carbon felt (GNCF), was prepared, for the first time, by in-situ modifying the doping species of polyacrylonitrile (PAN)-based carbon felt (CF) via a facile annealing process in Ar atmosphere. It was applied for dramatically enhanced organics degradation and electricity generation in a photocatalytic fuel cell (PFC) system. The GNCF showed enhanced specific surface area, improved graphitization and raised ratio of graphitic N, therefore resulting in excellently improved ORR performance compared to the CF. When applying the GNCF as a cathode in a PFC system, the proposed PFC showed significant improvement in degrading various model organic conta minants and outputing electricity simultaneously when compared with the PFC with CF. For instance, the apparent rate constant and electricity output efficiency showed ~10.6 times and ~7.2 times, respectively, improvement when using rhoda mine B as model waste. Further improved performance was also achieved by aeration of air or O₂ due to the further enhanced ORR. The proposed PFC was also efficient in a wide pH, and kept outstanding stability in long-term utilization.
- Photocatalytic fuel cell,
- Oxygen reduction reaction,
- Electricity,
- Graphitization,
- N-doping
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