5 years ago

Carbon nanofibers as parent materials for a graphene-based Fe-N-C catalyst for the oxygen reduction reaction

Carbon nanofibers as parent materials for a graphene-based Fe-N-C catalyst for the oxygen reduction reaction
Chemically-exfoliated graphene materials have been widely investigated for various applications. The graphene materials are typically synthesized from graphite granules, but their success as support materials of Fe-N-C electrocatalysts for the oxygen reduction reaction is highly ambiguous due to their large sheet-like morphology impeding the efficient transport of reactants/products. In this study, we synthesize a graphene-based Fe-N-C catalyst from cabon nanofibers as parent materials, which consist of stacked-cup carbon surrounded by a few graphitic walls. This Fe-N-C catalyst shows a much improved catalytic activity compared with that synthesized from graphite granules. The physical and electrochemical characterizations reveal that the carbon nanofibers are simultaneously transferred into a mixture of small graphene ribbons and flakes after chemical exfoliation and surface modification, forming a porous network structure in a fabricated electrode with a modified electronic structure. The electrocatalytic pathway, methanol-tolerance, and active site of the graphene-based Fe-N-C catalyst are also investigated. The results show that the carbon nanofibers are promising parent carbon materials for preparation of graphene-based Fe-N-C electrocatalysts.

Publisher URL: www.sciencedirect.com/science

DOI: S0920586117303292

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.