Porous Fe, Co, and N-co-doped carbon nanofibers as high-efficiency oxygen reduction catalysts
- 50 Downloads
Oxygen reduction reaction (ORR) is an important reaction in fuel cells. Designing electrocatalysts with outstanding performance is always the key to renewable-energy technologies for fuel cells. Herein, we demonstrate the Fe, Co, and N co-doped porous carbon nanofibers (FeCo/N-C CNFs) as a novel high-performance electrocatalyst for ORR. The synthesis method of this electrocatalysts material is very simple via high-temperature calcination pyrolysis of zinc, cobalt bimetallic zeolitic imidazolate framework (ZIF)-coated electrospun polyacrylonitrile fibers. In alkaline media, the FeCo/N-C CNFs shows a Pt-like ORR performance. The FeCo/N-C CNFs catalysts exhibit excellent performance with an onset potential of 0.99 V and a half-wave potential of 0.83 V in 0.1 M KOH solution, which is similar to those of 20 wt% Pt/C catalysts. Meanwhile, regarding long-term durability and methanol tolerance, the as-synthesized FeCo/N-C CNF catalysts also outperform commercial Pt/C. The unusual catalytic activity mainly from the improvement of electron transfer channels and catalytic sites arise from Fe, Co, and N doping in the porous structure carbon nanofibers.
KeywordsElectrospinning Nanostructures Oxygen reduction reaction Zeolitic imidazolate framework Electrocatalysts
We thank Mr. Jing-Ze Zhang for his contribution to the characterization of samples and analysis of results.
This work was sponsored by Shanghai Rising-Star Program (19QA1404100). This research was also supported by the National Natural Science Foundation of China (nos. 21671133 and 91745112). This work was funded by the Shanghai Municipal Education Commission (nos. 15ZZ088 and 15SG49), the Science and Technology Commission of Shanghai Municipality (18020500800).
Compliance with ethical standards
Conflict of Interest
The authors declare that they have no conflict of interest.
- Alegre C, Busacca C, Di Blasi O, Antonucci V, Aricò AS, Di Blasi A, Baglio V (2017) A combination of CoO and Co nanoparticles supported on electrospun carbon nanofibers as highly stable air electrodes. J Power Sources 364:101–109. https://doi.org/10.1016/j.jpowsour.2017.08.007 CrossRefGoogle Scholar
- An L, Jiang N, Li B, Hua S, Fu Y, Liu J, Hao W, Xia D, Sun Z (2018) A highly active and durable iron/cobalt Alloy catalyst encapsulated in N-doped graphitic carbon nanotubes for oxygen reduction reaction by a nanofibrous dicyandiamide template. J Mater Chem A 6:5962–5970. https://doi.org/10.1039/C8TA01247D CrossRefGoogle Scholar
- Chen Y, Li X, Park K, Lu W, Wang C, Xue W, Yang F, Zhou J, Suo L, Lin T, Huang H, Li J, Goodenough JB (2017) Nitrogen-doped carbon for sodium-ion battery anode by self-etching and graphitization of bimetallic MOF-based composite. Chem 3:152–163. https://doi.org/10.1016/j.chempr.2017.05.021 CrossRefGoogle Scholar
- Guo Y, Yuan P, Zhang J, Hu Y, Amiinu IS, Wang X, Zhou J, Xia H, Song Z, Xu Q, Mu S (2018) Carbon nanosheets containing discrete Co-Nx-By-C active sites for efficient oxygen electrocatalysis and rechargeable Zn-air batteries. ACS Nano 12:1894–1901. https://doi.org/10.1021/acsnano.7b08721 CrossRefGoogle Scholar
- He D, Xiong Y, Yang J, Chen X, Deng Z, Pan M, Li Y, Mu S (2017) Nanocarbon-intercalated and Fe–N-codoped graphene as a highly active noble-metal-free bifunctional electrocatalyst for oxygen reduction and evolution. J Mater Chem A 5(5):1930–1934. https://doi.org/10.1039/C5TA09232A CrossRefGoogle Scholar
- Jaouen F, Proietti E, Lefèvre M, Chenitz R, Dodelet JP, Wu G, Chung HT, Johnston CM, Zelenay P (2011) Recent advances in non-precious metal catalysis for oxygen-reduction reaction in polymer electrolyte fuel cells. Energy Environ Sci 4:114–130. https://doi.org/10.1039/c0ee00011f CrossRefGoogle Scholar
- Lu B, Smart TJ, Qin D, Lu JE, Wang N, Chen L, Peng Y, Ping Y, Chen S (2017) Nitrogen and iron-codoped carbon hollow nanotubules as high-performance catalysts toward oxygen reduction reaction: a combined experimental and theoretical study. Chem Mater 29:5617–5628. https://doi.org/10.1021/acs.chemmater.7b01265 CrossRefGoogle Scholar
- Qiu Y, Yu J, Shi T, Zhou X, Bai X, Huang JY (2011) Nitrogen-doped ultrathin carbon nanofibers derived from electrospinning: large-scale production, unique structure, and application as electrocatalysts for oxygen reduction. J Power Sources 196:9862–9867. https://doi.org/10.1016/j.jpowsour.2011.08.013 CrossRefGoogle Scholar
- Su CY, Cheng H, Li W, Liu ZQ, Li N, Hou Z, Bai FQ, Zhang HX, Ma TY (2017) Atomic modulation of FeCo-nitrogen-carbon bifunctional oxygen electrodes for rechargeable and flexible all-solid-state zinc-air battery. Adv Energy Mater 7:1602420. https://doi.org/10.1002/aenm.201602420 CrossRefGoogle Scholar
- Wu T, Fan J, Li Q, Shi P, Xu Q, Min Y (2018) Palladium nanoparticles anchored on anatase titanium dioxide-black phosphorus hybrids with heterointerfaces: highly electroactive and durable catalysts for ethanol electrooxidation. Adv Energy Mater 8:1701799. https://doi.org/10.1002/aenm.201701799 CrossRefGoogle Scholar
- Zhang Y, Lin Y, Jiang H, Wu C, Liu H, Wang C, Chen S, Duan T, Song L (2018b) Well-defined cobalt catalyst with N-doped carbon layers enwrapping: the correlation between surface atomic structure and electrocatalytic property. Small 14:1702074. https://doi.org/10.1002/smll.201702074 CrossRefGoogle Scholar