Microwave Enabled One-Pot, One-Step Fabrication and Nitrogen Doping of Holey Graphene Oxide for Catalytic Applications

Mehulkumar Patel, Wenchun Feng, Keerthi Savaram, M. Reza Khoshi, Ruiming Huang, Jing Sun, Emann Rabie, Carol Flach, Richard Mendelsohn, Eric Garfunkel, Huixin He

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

The unique properties of a holey graphene sheet, referred to as a graphene sheet with nanoholes in its basal plane, lead to wide range of applications that cannot be achieved by its nonporous counterpart. However, the large-scale solution-based production requires graphene oxide (GO) or reduced GO (rGO) as the starting materials, which take hours to days for fabrication. Here, an unexpected discovery that GO with or without holes can be controllably, directly, and rapidly (tens of seconds) fabricated from graphite powder via a one-step-one-pot microwave assisted reaction with a production yield of 120 wt% of graphite is reported. Furthermore, a fast and low temperature approach is developed for simultaneous nitrogen (N) doping and reduction of GO sheets. The N-doped holey rGO sheets demonstrate remarkable electrocatalytic capabilities for the electrochemical oxygen reduction reaction. The existence of the nanoholes provides a "short cut" for efficient mass transport and dramatically increases edges and surface area, therefore, creates more catalytic centers. The capability of rapid fabrication and N-doping as well as reduction of holey GO can lead to development of an efficient catalyst that can replace previous coin metals for energy generation and storage, such as fuel cells and metal-air batteries.

Original languageEnglish
Pages (from-to)3358-3368
Number of pages11
JournalSmall
Volume11
Issue number27
DOIs
Publication statusPublished - Jul 1 2015

Keywords

  • graphene oxide
  • heteroatom doping
  • holey graphene sheets
  • microwave irradiation
  • oxygen reduction reaction

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Engineering (miscellaneous)

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  • Cite this

    Patel, M., Feng, W., Savaram, K., Khoshi, M. R., Huang, R., Sun, J., Rabie, E., Flach, C., Mendelsohn, R., Garfunkel, E., & He, H. (2015). Microwave Enabled One-Pot, One-Step Fabrication and Nitrogen Doping of Holey Graphene Oxide for Catalytic Applications. Small, 11(27), 3358-3368. https://doi.org/10.1002/smll.201403402