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Preparation of zero-valent Co/N-CNFs as an immobilized thin film onto graphite disc for methanol electrooxidation

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Abstract

In this study, we developed new method to prepare one-pot current collector/electrode plate to be utilized in the fuel cell technology. In situ preparation of zero-valent N-doped Co carbon nanofibers (Co/N-CNFs) as an immobilized thin film onto graphite disc was achieved by electrospinning technique, followed by calcination at 1100 oC in argon atmosphere. This catalyst was used for methanol electrooxidation in alkaline media. The effects of nitrogen doping and immobilization on the activity and stability of the prepared catalysts were studied using cyclic voltammetry and chronoamperometry, respectively. SEM, TEM, EDX, XRD, and TGA were used to characterize the morphology and composition of Co/N-CNFs catalysts. The results showed that the electrocatalytic activity as well as the stability of Co/N-CNFs towards methanol electrooxidation in alkaline media were significantly affected by both nitrogen doping and immobilization of the catalyst on the graphite disc. Moreover, the methanol concentration has also affected the electrocatalytic activity of Co/N-CNFs-supported immobilized onto graphite disc and Co/N-CNFs-unsupported graphite disc.

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Authors and Affiliations

  1. Petrochemical Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia

    Badr M. Thamer, Mohamed H. El-Newehy & Salem S. Al-Deyab

  2. Department of Chemistry, Faculty of Science, Tanta University, Tanta, 31527, Egypt

    Mohamed H. El-Newehy

  3. Organic Materials and Fiber Engineering Department, College of Engineering, Chonbuk National University, Jeonju, 54896, Korea

    Nasser A. M. Barakat & Hak Yong Kim

  4. Chemical Engineering Department, Faculty of Engineering, Minia University, El Minia, 61111, Egypt

    Nasser A. M. Barakat

Authors
  1. Badr M. Thamer
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  2. Mohamed H. El-Newehy
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  3. Nasser A. M. Barakat
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  4. Salem S. Al-Deyab
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  5. Hak Yong Kim
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Correspondence to Mohamed H. El-Newehy.

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Thamer, B.M., El-Newehy, M.H., Barakat, N.A.M. et al. Preparation of zero-valent Co/N-CNFs as an immobilized thin film onto graphite disc for methanol electrooxidation. Fibers Polym 18, 696–705 (2017). https://doi.org/10.1007/s12221-017-1068-y

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  • DOI: https://doi.org/10.1007/s12221-017-1068-y

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