Extraordinarily high hydrogen-evolution-reaction activity of corrugated graphene nanosheets derived from biomass rice husks

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Abstract

The metal-free carbonaceous catalysts are one of the promising candidates for efficient electrocatalytic hydrogen production. Aiming at demonstrating the high electrocatalytic activity of the hydrogen evolution reaction (HER), we synthesized the biomass rice husk-derived corrugated graphene (RH-CG) nanosheets via the KOH activation. The 700 °C-activated RH-CG nanosheets exhibited the large specific surface area as well as the high electrical conductivity. When using the RH-CG nanosheets as a HER electrocatalyst in 0.5 M H2SO4, the excellent HER activities with a small overpotential (9 mV at 10 mA/cm2) and a small Tafel slope (31 mV/dec) were achieved. The results provide a new strategy for materializing the superb biomass-derived electrocatalyst for highly efficient hydrogen production.

Original languageEnglish
Pages (from-to)40317-40326
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume47
Issue number95
DOIs
StatePublished - 8 Dec 2022

Keywords

  • Biomass
  • Electrocatalysts
  • Graphene
  • Hydrogen evaluation reaction
  • Nanosheets
  • Rice husk

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