Study of porous moss biochar as cathode catalyst for microbial fuel cell to enhance oxygen reduction

被引：0
|
作者：
Qian X. [1 ,2 ]
Wang L. [1 ,2 ]
Zhang Y. [3 ]
Yuan H. [1 ,2 ,4 ]
Deng L. [1 ]
机构：
[1] Guangzhou Institute of Energy Conversion, CAS Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou
[2] Nano Science and Technology Institute, University of Science and Technology of China, Suzhou
[3] College of Materials Science and Energy Engineering, Foshan University of Science and Technology, Foshan
[4] Dongguan Zhongkemianyuan Eco-Technologies Co. Ltd., Dongguan
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 11期
关键词：
Biochar; Cathode catalyst; Microbial fuel cell; Moss; ORR;
D O I：
10.19912/j.0254-0096.tynxb.2019-1197
中图分类号：
学科分类号：
摘要：
Nitrogen-doped porous moss biochar's have been successfully prepared by hydrothermal carbonization and high-temperature pyrolysis of variety mosses. The morphology and structural characterization of the carbon materials were observed by scanning electron microscopy and X-ray electron spectroscopy. The electrochemical behavior of the as-prepared moss biochar's was investigated by cyclic voltammetry(CV) and linear sweep voltammograms(LSV). The results shown that the biochar derived from hypnum plumaeforme showed the largest specific surface area, the highest catalytic content of pyridine nitrogen and graphite nitrogen. In neutral media, the as-prepared moss biochar exhibited an initial potential of about 0.30 V (vs. Ag/AgCl), and its electron transfer number is calculated to about 3.64, indicating a nearly four-electron reaction process. Moreover, a maximum power density of 675 mW/cm2 was got when the as prepared catalyst is applied to the single MFCs, and after 60 cycle's operation, the voltage is only reduced 0.02 V, indicating a great long-term stability. This study indicates that the nitrogen-doped porous biochar derived from hypnum plumaeforme was a cost-efficient and promising cathodic catalyst for scale-up MFCs. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：395 / 402
页数：7
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