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

研究成果: Article査読

123 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
外部発表はい

ASJC Scopus subject areas

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

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