Microwave exfoliation of graphite oxides in H2S plasma for the synthesis of sulfur-doped graphenes as oxygen reduction catalysts

Colin Hong An Wong, Zdeněk Sofer, Kateřina Klímová, Martin Pumera

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Abstract

Tuning the electronic and chemical properties of graphene can be carried out through heteroatomic doping, enabling its use as an electrocatalyst. Sulfur-doped graphene has been suggested to be a viable alternative to traditional Pt-based catalysts for oxygen reduction under alkaline conditions. Herein we present a fast and efficient route to synthesize S-doped graphenes through the microwave-assisted exfoliation and reduction of three different graphite oxides in the presence of hydrogen sulfide. The materials obtained were characterized using scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, combustion elemental analysis, and voltammetry. These S-doped graphenes were found to have good electrochemical performance and were active in the catalysis of the oxygen reduction reaction.

Original languageEnglish
Pages (from-to)31849-31855
Number of pages7
JournalACS Applied Materials and Interfaces
Volume8
Issue number46
DOIs
Publication statusPublished - 2016 Nov 23

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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