Hierarchical nanocomposite of cobalt sulfide nanoflakes-decorated reduced graphene oxide for enhancing the electrocatalytic hydrogen evolution reaction

Senthilkumar Muthu, Mano Balaji Gandhi, S. Saravanan, Sankar Sekar, S. Arun Kumar, P. Ilanchezhiyan, Sejoon Lee, Moorthy Babu Sridharan

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The hydrogen evolution reaction (HER) driven by electrocatalytic water splitting is attaining prevalent attention for the manufacturing of clean and green hydrogen energy. Herein, we report the simple one-step hydrothermal synthesis of cobalt sulfide nanoflakes decorated with reduced graphene oxide (CoS/rGO) nanocomposites as an effective electrode material for HER. The CoS/rGO nanocomposites exhibited the rGO nanosheet-decorated hierarchically interconnected CoS nanoflakes structure. The CoS/rGO nanocomposites exhibited an excellent HER activity with a low overpotential of 371 mV and a small Tafel slope of 103 mV/dec. More interestingly, the catalytic stability of CoS/rGO nanocomposites is comparatively higher than the pristine CoS NFs. These results suggest that the facile nanocomposites of CoS/rGO could be a prominent catalytic material for effective green hydrogen production.

Original languageEnglish
Pages (from-to)1405-1414
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume52
DOIs
StatePublished - 2 Jan 2024

Keywords

  • CoS/rGO nanocomposites
  • Electrocatalyst
  • Hierarchical nanostructures
  • Hydrogen evolution reaction
  • Water splitting

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