Efficient synthesis of heteroatom (N or S)-doped graphene based on ultrathin graphene oxide-porous silica sheets for oxygen reduction reactions

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Shubin Yang - , Max Planck Institute for Polymer Research (Author)
  • Linjie Zhi - , National Center for Nanoscience and Technology (Author)
  • Kun Tang - , Max Planck Institute for Solid State Research (Author)
  • Xinliang Feng - , Max Planck Institute for Polymer Research, Shanghai Jiao Tong University (Author)
  • Joachim Maier - , Max Planck Institute for Solid State Research (Author)
  • Klaus Müllen - , Max Planck Institute for Polymer Research (Author)

Abstract

Heteroatom (N or S)-doped graphene with high surface area is successfully synthesized via thermal reaction between graphene oxide and guest gases (NH 3 or H 2S) on the basis of ultrathin graphene oxide-porous silica sheets at high temperatures. It is found that both N and S-doping can occur at annealing temperatures from 500 to 1000 °C to form the different binding configurations at the edges or on the planes of the graphene, such as pyridinic-N, pyrrolic-N, and graphitic-N for N-doped graphene, thiophene-like S, and oxidized S for S-doped graphene. Moreover, the resulting N and S-doped graphene sheets exhibit good electrocatalytic activity, long durability, and high selectivity when they are employed as metal-free catalysts for oxygen reduction reactions. This approach may provide an efficient platform for the synthesis of a series of heteroatom-doped graphenes for different applications. Heteroatom (N or S)-doped graphenes are synthesized via thermal reaction between graphene oxide and guest gases (NH 3 or H 2S) on ultrathin graphene oxide-porous silica sheets at high temperatures. It is found that both N and S-doping can occur to form the different binding configurations in the graphene and both N and S-doped graphene sheets exhibit excellent electrocatalytic properties for oxygen reduction reaction.

Details

Original languageEnglish
Pages (from-to)3634-3640
Number of pages7
JournalAdvanced functional materials
Volume22
Issue number17
Publication statusPublished - 11 Sept 2012
Peer-reviewedYes
Externally publishedYes

Keywords

Keywords

  • doping, fuel cells, graphene, nanosheets, oxygen reduction reactions