Hierarchically ordinated two-dimensional MoS2 nanosheets on three-dimensional reduced graphene oxide aerogels as highly active and stable catalysts for hydrogen evolution reaction

Hyeonggeun Choi, Suok Lee, Min Cheol Kim, Yeonsu Park, A. Rang Jang, Wook Ahn, Jung Inn Sohn, Jong Bae Park, John Hong, Young Woo Lee

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Hydrogen gas (H2) is being intensively proposed as a next-generation clean energy owing to the depletion of fossil fuels. Electrochemical water splitting is one of the most promising processes for hydrogen production. Furthermore, many efforts focusing on electrochemical water splitting have been made to develop low-cost, electrochemically active, and stable catalysts for efficient hydrogen production. MoS2 has emerged as an attractive material for developing catalysts for the hydrogen evolution reaction (HER). Hence, in this study, we design hierarchically ordinated two-dimensional (2D) MoS2 nanosheets on three-dimensional (3D) reduced graphene oxide (rGO) (H-2D/3D-MoS2-rGO) aerogel structures as a new class of electrocatalysts for the HER.We use the one-pot hydrothermal synthesis route for developing high-performance electroactive materials for the HER. The as-prepared H-2D/3D-MoS2-rGO contains a unique 3D hierarchical structure providing large surface areas owing to the 3D porous networks of rGO and more active sites owing to the many edge sites in the MoS2 nanosheets. In addition, the H-2D/3D-MoS2-rGO structure exhibits remarkable electrochemical properties during the HER. It shows a lower overpotential than pure MoS2 and excellent electrochemical stability owing to the large number of active sites (highly exposed edge sites) and high electrical conductivity from the rGO structure.

Original languageEnglish
Article number182
Pages (from-to)1-10
Number of pages10
JournalCatalysts
Volume11
Issue number2
DOIs
StatePublished - Feb 2021

Keywords

  • 3d networks
  • Electrocatalysts
  • Hydrogen evolution reaction
  • Molybdenum disulfide
  • Reduced graphene oxide

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