中国炼油与石油化工 ›› 2021, Vol. 23 ›› Issue (2): 98-108.

• Catalyst Research • 上一篇    下一篇

Fabrication of Fe Nanoparticles into N-doped Mesoporous Carbon Nanotube Derived from rice-like Fe/N-MOF and its ORR catalytic performance for MFC

卢德成,王文艺,常嘉诚,王雪芹,王园园,宋华   

  1. 东北石油大学化学化工学院
  • 收稿日期:2020-09-18 修回日期:2020-11-16 出版日期:2021-06-30 发布日期:2021-06-10
  • 通讯作者: 宋华 E-mail:songhua2004@sina.com
  • 作者简介:2020-10-17

Fabrication of Fe Nanoparticles into N-doped Mesoporous Carbon Nanotube Derived from rice-like Fe/N-MOF and its ORR catalytic performance for MFC

Lu Decheng1,Wang Wenyi2,Chang Jiacheng2,Wang Xueqin2,Wang Yuanyuan2,Song Hua2   

  1. 1. Northeast Petroleum University
    2.
  • Received:2020-09-18 Revised:2020-11-16 Online:2021-06-30 Published:2021-06-10
  • Contact: Song Hua E-mail:songhua2004@sina.com

摘要: 非贵金属氧还原催化剂(ORR)的发展,以改善微生物燃料电池(MFC)的性能仍然是一个极大的挑战。本文以乙腈为氮前体,在低成本的有机溶剂中,以Fe/N-MOF为原料,采用热解法制备了铁基含氮多孔碳纳米管Fe/N-MC-T ORR催化剂。通过SEM、TEM、BET、XRD和XPS对不同热解温度下Fe/N-MC-T催化剂进行了表征。Fe/N-MOF呈光滑的米粒状结构,粒径约为400×50 nm。Fe/N-MC-T中的铁元素主要以零价铁的形式存在,Fe3C含量较低。电化学测试结果表明,Fe/N-MC-T的起始电位和半波电位分别为0.89 V和0.80 V,略低于商用Pt/C的0.92 V和0.82 V,说明Fe/N-MC-700对ORR具有较高的电催化活性。Fe/N-MC-700在MFC中显示的最高功率密度864.1 mW?m - 2,大约是碳布的2.25倍,略低于MFC和Pt / C (20 wt %) (1002.0 mW?m - 2),展示了铁颗粒包裹在碳纳米管是具有高度活跃的氧还原性能。

关键词: 微生物燃料电池, 金属有机框架, 氮掺杂, 氧还原反应, Fe / N-MC-T催化剂.

Abstract: The development of non-noble metal oxygen reduction catalysts (ORR) to improve microbial fuel cell (MFC) performance remains extremely challenging. Herein, nitrogen-doped iron-based porous carbon nanotube Fe/N-MC-T ORR catalysts were derived from Fe/N-MOF by pyrolyzation using acetonitrile as the nitrogen precursor in a low-cost organic solvent. The Fe/N-MC-T catalysts with different pyrolysis temperatures (T) were characterized by SEM, TEM, BET, XRD and XPS. Fe/N-MOF showed a smooth rice-like structure with a particle size of about 400×50 nm. The Fe species in Fe/N-MC-T mainly exists in the form of zero-valent iron with small amount of Fe3C. The electrochemical tests reveal that the onset and half-wave potentials of Fe/N-MC-T were 0.89 V and 0.80 V respectively, which are slightly lower than those of the commercial Pt/C (0.92 V and 0.82 V), indicating that Fe/N-MC-700 had the high electrocatalytic activity for ORR. The MFC with Fe/N@MC-700 showed the highest power density of 864.1 mW?m-2, which was about 2.25 times as compared to that of MFC with carbon cloth, and slightly lower than that of MFC with Pt/C (20 wt%) (1002.0 mW?m-2), demonstrating the Fe particles wrapped in carbon nanotubes are highly active to ORR.

Key words: microbial fuel cells, metal organic framework, nitrogen doping, oxygen reduction reaction, Fe/N-MC-T catalyst.