Sub-50 nm Iron-Nitrogen-Doped Hollow Carbon Sphere-Encapsulated Iron Carbide Nanoparticles as Efficient Oxygen Reduction Catalysts.
Sub-50 nm Iron-Nitrogen-Doped Hollow Carbon Sphere-Encapsulated Iron Carbide Nanoparticles as Efficient Oxygen Reduction Catalysts.
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DOI:
10.1002/advs.201800120
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发表时间:
2018-07
期刊:
影响因子:
--
通讯作者:
Yamauchi Y
中科院分区:
文献类型:
--
作者:
Tan H;Li Y;Kim J;Takei T;Wang Z;Xu X;Wang J;Bando Y;Kang YM;Tang J;Yamauchi Y
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.
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影响因子:
29.4
作者:
Ai, Kelong;Liu, Yanlan;Lu, Gaoqing (Max)
通讯作者:
Lu, Gaoqing (Max)
DOI:
10.1002/actp.1990.010410205
发表时间:
1990-02-01
期刊:
ACTA POLYMERICA
影响因子:
--
作者:
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15
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8.6
作者:
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通讯作者:
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