Bottom-up synthesis of graphene via hydrothermal cathodic reduction

Takaaki Tomai, Yuta Nakayasu, Yusuke Okamura, Shunichi Ishiguro, Naoki Tamura, Shusuke Katahira, Itaru Honma

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

To date, considerable effort had been devoted to developing a bottom-up synthesis method of graphene, but the methods have been mostly limited to chemical vapor deposition and SiC surface decomposition. Herein, we demonstrated the bottom-up synthesis of graphene via hydrothermal cathodic reduction. In the developed process, the hydrothermal conditions were tuned to enhance the electrochemical reaction and prevent the formation of undesirable amorphous carbon. The nature of the deposited carbonaceous material depends strongly on the temperature, and changes from amorphous carbon into graphitic carbon and graphene with increasing temperature. This should be because of the enhanced oxidative etching effect of amorphous carbon under hydrothermal condition. Finally, the hydrothermal electrochemical reaction enabled graphene growth on a cathode surface at 300 °C.

Original languageEnglish
Pages (from-to)131-136
Number of pages6
JournalCarbon
Volume158
DOIs
Publication statusPublished - 2020 Mar

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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