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电化学(中英文) ›› 2018, Vol. 24 ›› Issue (6): 726-732.  doi: 10.13208/j.electrochem.180842

• 庆祝衣宝廉院士八十华诞专辑 • 上一篇    下一篇

Fe-N共掺杂的碳纳米管串联空心球对氧还原反应的电催化

张雅琳1,2,陈 驰1,邹亮亮1,邹志青1*,杨 辉1*   

  1. 1. 中国科学院上海高等研究院, 上海 201210; 2. 中国科学院大学, 北京 100049
  • 收稿日期:2018-09-04 修回日期:2018-09-14 出版日期:2018-12-28 发布日期:2018-09-26
  • 通讯作者: 邹志青,杨辉 E-mail: zouzq@sari.ac.cn; yangh@sari.ac.cn
  • 基金资助:
    黑龙江省自然科学基金(No. QC2013C008)资助

Fe-N Doped Hollow Carbon Nanospheres Linked by Carbon Nanotubes for Oxygen Reduction Reaction

ZHANG Ya-lin1,2, CHEN Chi1, ZOU Liang-liang1, ZOU Zhi-qing1*, YANG Hui1*   

  1. 1. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China;2. University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2018-09-04 Revised:2018-09-14 Published:2018-12-28 Online:2018-09-26
  • Contact: ZOU Zhi-qing, YANG Hui E-mail: zouzq@sari.ac.cn; yangh@sari.ac.cn

摘要: 以ZIF-8为模板,通过表面包覆聚多巴胺、同时刻蚀ZIF-8中的Zn2+,形成空心球,在与三氯化铁络合后,经高温碳化和氨气热处理,得到了高比表面积的Fe-N共掺杂的碳纳米管串联的碳纳米空心球催化剂. 氨气不仅刻蚀碳基底提高比表面积,还可还原铁元素形成Fe4N纳米粒子,提升了催化剂对氧还原反应的电催化活性,其氧还原半波电位达0.79 V,仅比商业Pt/C低60 mV,而且其稳定性和耐甲醇性更优于商业Pt/C,展示出良好的燃料电池应用潜力.

关键词: 非贵金属催化剂, 氧还原反应, 聚多巴胺, 氨气刻蚀, 碳纳米管/空心球复合物

Abstract: The development of non-precious metal catalysts for oxygen reduction reaction (ORR) is essential for large-scale application of proton exchange membrane fuel cells. Herein, we present the in situ formed Fe-N doped hollow carbon nanospheres linked by carbon nanotubes composite, synthesized by using ZIF-8 as sacrificed template to form polydopamine (PDA) hollow nanospheres, followed by complexing with FeCl3, high temperature heat-treatment and NH3-etching. ZIF-8 was gradually decomposed simultaneously with PDA coating due to the loss of Zn2+ grabbed by PDA. NH3 etching resulted in the improved surface area, while the reducibility of NH3 resulted in the formation of Fe4N nanoparticles, which benefits the ORR activity of the catalyst. The half-wave potential of the as-prepared of PDA-Fe/N/C-NH3 was 0.79 V, only 60 mV lower than that of commercial Pt/C. The stability and methanol tolerance of PDA-Fe/N/C-NH3 were even superior to that of commercial Pt/C, indicating the good potential of PDA-Fe/N/C-NH3 for the application of fuel cells.

Key words: non-precious metal catalyst, oxygen reduction reaction, polydopamine, NH3-etching, carbon nanotubes/hollow nanospheres composite

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