铁硫氮共掺杂多孔碳阴极催化剂强化微生物燃料电池性能的研究

唐新华; 贾煜瑒; 崔杨; 陈默禹; 刘磊

doi:10.13205/j.hjgc.202110023

铁硫氮共掺杂多孔碳阴极催化剂强化微生物燃料电池性能的研究

doi: 10.13205/j.hjgc.202110023

武汉理工大学土木工程与建筑学院, 武汉 430070

基金项目:

国家自然科学基金资助项目（21806126）。

详细信息

作者简介:
唐新华。tnagxinhua@whut.edu.cn

通讯作者:
唐新华。tnagxinhua@whut.edu.cn

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- 文章访问数: 91
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- 被引次数: 0
出版历程
- 收稿日期: 2020-12-12
- 网络出版日期: 2022-01-26

ENHANCEMENT OF MICROBIAL FUEL CELL PERFORMANCE BY Fe-S-N CO-DOPED POROUS CARBON CATHODE CATALYST

School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China

摘要

摘要: 以杨梅为生物质、Fe₂（SO₄）₃为掺杂源，通过水合-热解-碳化的方法制备了FeSN-C复合催化材料，对其进行表征并应用于催化微生物燃料电池的阴极氧还原反应。结果表明：FeSN-C阴极在产能性能上表现优越，产生的峰值输出电压和功率密度为550 mV和854 mW/m²，分别为商业铂碳的98.6%和83.2%。同时FeSN-C阴极具有较低的过电位和高电子转移数（n=3.78），遵循1个由四电子主导的催化过程。FeSN-C阴极相比于铂碳阴极具有更好的稳定性，在电流衰减测试中，FeSN-C阴极的衰减为17.1%，明显低于铂碳阴极的23.5%。Fe、S、N等原子的掺杂使得碳骨架发生了大量塌陷，这有利于暴露出更多的活性位点，同时Fe、S、N之间的协同作用也是提高阴极氧还原反应性能的关键。
- 微生物燃料电池 /
- 阴极催化剂 /
- 功率密度 /
- 活性位点 /
- 氧还原反应
Abstract: FeSN-Ccomposite catalytic material was prepared by hydration-pyrolyzation-carbonization using baycherry as a biomass and Fe₂(SO₄)₃ as the doping source. FeSN-C composite catalytic material was characterized and applied as a cathode of microbial fuel cells (MFC) to drive the oxygen reduction reaction(ORR). The results showed that FeSN-C cathode performed well in electricity generation, producing the peak output voltage and power density of 550 mV and 854 mW/m², which were 98.6% and 83.2% of that of commercial platinum carbon (Pt/C),respectively. At the same time, FeSN-C cathode had a small overpotential and high electron transfer number for ORR (n=3.78), dominated by the four electronic transfer reaction process. Further compared to the commercial platinum carbon product, FeSN-C had stronger stability, which was reduced by 17.1% in the current attenuation test, lower than 23.5% of the Pt/C cathode. The doping of Fe, S and N atoms led to a large collapse of the carbon skeleton, where more active sites were exposed. Meanwhile, the synergy between Fe, S, N was the key to improve the ORR of the cathode.
- microbial fuel cells /
- cathode catalyst /
- power density /
- active site /
- oxygen reduction reaction

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