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Sub‐50 nm Iron–Nitrogen‐Doped Hollow Carbon Sphere‐Encapsulated Iron Carbide Nanoparticles as Efficient Oxygen Reduction Catalysts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tan, Haibo Li, Yunqi Kim, Jeonghun Takei, Toshiaki Wang, Zhongli Xu, Xingtao Wang, Jie Bando, Yoshio Kang, Yong-Mook Tang, Jing Yamauchi, Yusuke |
| Copyright Year | 2018 |
| Abstract | 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. |
| File Format | PDF HTM / HTML |
| DOI | 10.1002/advs.201800120 |
| Alternate Webpage(s) | https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4233&context=aiimpapers |
| PubMed reference number | 30027043 |
| Alternate Webpage(s) | https://doi.org/10.1002/advs.201800120 |
| Volume Number | 5 |
| Journal | Advanced science |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
