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Probing the catalytic activity of porous graphene oxide and the origin of this behaviour

Author

Listed:
  • Chenliang Su

    (Graphene Research Centre, National University of Singapore)

  • Muge Acik

    (University of Texas at Dallas)

  • Kazuyuki Takai

    (Tokyo Institute of Technology)

  • Jiong Lu

    (Graphene Research Centre, National University of Singapore)

  • Si-jia Hao

    (Tokyo Institute of Technology)

  • Yi Zheng

    (Graphene Research Centre, National University of Singapore)

  • Pingping Wu

    (Graphene Research Centre, National University of Singapore)

  • Qiaoliang Bao

    (Graphene Research Centre, National University of Singapore)

  • Toshiaki Enoki

    (Tokyo Institute of Technology)

  • Yves J. Chabal

    (University of Texas at Dallas)

  • Kian Ping Loh

    (Graphene Research Centre, National University of Singapore)

Abstract

Graphene oxide, a two-dimensional aromatic scaffold decorated by oxygen-containing functional groups, possesses rich chemical properties and may present a green alternative to precious metal catalysts. Graphene oxide-based carbocatalysis has recently been demonstrated for aerobic oxidative reactions. However, its widespread application is hindered by the need for high catalyst loadings. Here we report a simple chemical treatment that can create and enlarge the defects in graphene oxide and impart on it enhanced catalytic activities for the oxidative coupling of amines to imines (up to 98% yield at 5 wt% catalyst loading, under solvent-free, open-air conditions). This study examines the origin of the enhanced catalytic activity, which can be linked to the synergistic effect of carboxylic acid groups and unpaired electrons at the edge defects. The discovery of a simple chemical processing step to synthesize highly active graphene oxide allows the premise of industrial-scale carbocatalysis to be explored.

Suggested Citation

  • Chenliang Su & Muge Acik & Kazuyuki Takai & Jiong Lu & Si-jia Hao & Yi Zheng & Pingping Wu & Qiaoliang Bao & Toshiaki Enoki & Yves J. Chabal & Kian Ping Loh, 2012. "Probing the catalytic activity of porous graphene oxide and the origin of this behaviour," Nature Communications, Nature, vol. 3(1), pages 1-9, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms2315
    DOI: 10.1038/ncomms2315
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    Cited by:

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    2. Peng Zhang & Tianzeng Chen & Qingxin Ma & Biwu Chu & Yonghong Wang & Yujing Mu & Yunbo Yu & Hong He, 2022. "Diesel soot photooxidation enhances the heterogeneous formation of H2SO4," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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