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Hassan D, El-Safty S, Khalil KA, et al. Carbon Supported Engineering NiCo₂O₄ Hybrid Nanofibers with Enhanced Electrocatalytic Activity for Oxygen Reduction Reaction. Materials (Basel). 2016;9(9)doi: 10.3390/ma9090759.
Hassan, D., El-Safty, S., Khalil, K. A., Dewidar, M., & Abu El-Magd, G. (2016). Carbon Supported Engineering NiCo₂O₄ Hybrid Nanofibers with Enhanced Electrocatalytic Activity for Oxygen Reduction Reaction. Materials (Basel, Switzerland), 9(9), . https://doi.org/10.3390/ma9090759
Hassan, Diab, et al. "Carbon Supported Engineering NiCo₂O₄ Hybrid Nanofibers with Enhanced Electrocatalytic Activity for Oxygen Reduction Reaction." Materials (Basel, Switzerland) vol. 9,9 (2016). doi: https://doi.org/10.3390/ma9090759
Hassan D, El-Safty S, Khalil KA, Dewidar M, Abu El-Magd G. Carbon Supported Engineering NiCo₂O₄ Hybrid Nanofibers with Enhanced Electrocatalytic Activity for Oxygen Reduction Reaction. Materials (Basel). 2016 Sep 06;9(9). doi: 10.3390/ma9090759. PMID: 28773878; PMCID: PMC5457091.
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Materials (Basel). 2016 Sep 06;9(9). doi: 10.3390/ma9090759.

Carbon Supported Engineering NiCo₂O₄ Hybrid Nanofibers with Enhanced Electrocatalytic Activity for Oxygen Reduction Reaction.

Materials (Basel, Switzerland)

Diab Hassan, Sherif El-Safty, Khalil Abdelrazek Khalil, Montasser Dewidar, Gamal Abu El-Magd

Affiliations

  1. Mechanical Design and Materials Department, Faculty of Energy Engineering, Aswan University, Aswan 81521, Egypt. [email protected].
  2. National Institute for Materials Science (NIMS), Research Center for Strategic Materials, 1-2-1Sengen, Tsukuba-shi, Ibaraki-ken 305-0047, Japan. [email protected].
  3. Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-Ku, Tokyo 169-8555, Japan. [email protected].
  4. Mechanical Design and Materials Department, Faculty of Energy Engineering, Aswan University, Aswan 81521, Egypt. [email protected].
  5. Department of Mechanical Engineering, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia. [email protected].
  6. Department of Mechanical Engineering, Faculty of Engineering, Kafrelsheikh University, Elgaishstreet, Kafrelsheikh 33516, Egypt. [email protected].
  7. Production Engineering and Design Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt. [email protected].

PMID: 28773878 PMCID: PMC5457091 DOI: 10.3390/ma9090759

Abstract

The design of cheap and efficient oxygen reduction reaction (ORR) electrocatalysts is of a significant importance in sustainable and renewable energy technologies. Therefore, ORR catalysts with superb electrocatalytic activity and durability are becoming a necessity but still remain challenging. Herein, we report C/NiCo₂O₄ nanocomposite fibers fabricated by a straightforward electrospinning technique followed by a simple sintering process as a promising ORR electrocatalyst in alkaline condition. The mixed-valence oxide can offer numerous accessible active sites. In addition, the as-obtained C/NiCo₂O₄ hybrid reveals significantly remarkable electrocatalytic performance with a highly positive onset potential of 0.65 V, which is only 50 mV lower than that of commercially available Pt/C catalysts. The analyses indicate that C/NiCo₂O₄ catalyst can catalyze O₂-molecules via direct four electron pathway in a similar behavior as commercial Pt/C catalysts dose. Compared to single NiCo₂O₄ and carbon free NiCo₂O₄, the C/NiCo₂O₄ hybrid displays higher ORR current and more positive half-wave potential. The incorporated carbon matrices are beneficial for fast electron transfer and can significantly impose an outstanding contribution to the electrocatalytic activity. Results indicate that the synthetic strategy hold a potential as efficient route to fabricate highly active nanostructures for practical use in energy technologies.

Keywords: NiCo2O4; ORR; PAN; electrospinning; nanofiber

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