Sub-50 nm Iron–Nitrogen-Doped Hollow Carbon Sphere-Encapsulated Iron Carbide Nanoparticles as Efficient Oxygen Reduction Catalysts

Haibo Tan, Yunqi Li*, Jeonghun Kim, Toshiaki Takei, Zhongli Wang, Xingtao Xu, Jie Wang, Yoshio Bando, Yong Mook Kang, Jing Tang, Yusuke Yamauchi

*この研究の対応する著者

研究成果: Article査読

150 被引用数 (Scopus)

抄録

Sub-50 nm iron–nitrogen-doped hollow carbon sphere-encapsulated iron carbide nanoparticles (Fe3C-Fe,N/C) are synthesized by using a triblock copolymer of poly(styrene-b-2-vinylpyridine-b-ethylene oxide) as a soft template. Their typical features, including a large surface area (879.5 m2 g−1), small hollow size (≈16 nm), and nitrogen-doped mesoporous carbon shell, and encapsulated Fe3C nanoparticles generate a highly active oxygen reduction reaction (ORR) performance. Fe3C-Fe,N/C hollow spheres exhibit an ORR performance comparable to that of commercially available 20 wt% Pt/C in alkaline electrolyte, with a similar half-wave potential, an electron transfer number close to 4, and lower H2O2 yield of less than 5%. It also shows noticeable ORR catalytic activity under acidic conditions, with a high half-wave potential of 0.714 V, which is only 59 mV lower than that of 20 wt% Pt/C. Moreover, Fe3C-Fe,N/C has remarkable long-term durability and tolerance to methanol poisoning, exceeding Pt/C regardless of the electrolyte.

本文言語English
論文番号1800120
ジャーナルAdvanced Science
5
7
DOI
出版ステータスPublished - 2018 7月
外部発表はい

ASJC Scopus subject areas

  • 医学(その他)
  • 化学工学(全般)
  • 材料科学(全般)
  • 生化学、遺伝学、分子生物学(その他)
  • 工学(全般)
  • 物理学および天文学(全般)

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