Facile and cost-effective growth of MoS2 on 3D porous graphene-coated Ni foam for robust and stable hydrogen evolution reaction

Sajjad Hussain, Dhanasekaran Vikraman, Linh Truong, Kamran Akbar, Iqra Rabani, Hyun Seok Kim, Seung Hyun Chun, Jongwan Jung

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

To replace the costly, noble platinum electrocatalyst, the inexpensive, earth abundant and highly efficient electrocatalysts of layered transition metal dichalcogenides (TMDs) are explored for the hydrogen evolution reaction (HER). This paper describes cost-effective synthesis of 1T-MoS2 on 3D-graphene/Ni foam (NF) via a facile solution bath approach as an electrocatalyst for HER. The improved HER performances were observed due to the 3D-structure of MoS2/graphene. HER performance of MoS2/graphene/NF electrocatalyst exposed a superior catalytic performance with the low overpotential (−89 mV vs RHE) to drive the 10 mA cm−2, steep Tafel slope (45 mV dec−1), large exchange current density (4.16 × 10−1 mA cm−2), and robust stability over 18 h. Density functional theory (DFT) calculations also confirmed the reduced Gibbs free energy for H-adsorption (ΔGH) for MoS2/graphene compared to MoS2. The observed results suggest that the 1T-MoS2/graphene/NF is an interesting alternative to platinum-based catalyst for boosting HER efficiency.

Original languageEnglish
Pages (from-to)267-276
Number of pages10
JournalJournal of Alloys and Compounds
Volume788
DOIs
StatePublished - 5 Jun 2019

Bibliographical note

Publisher Copyright:
© 2019

Keywords

  • DFT
  • Gibbs free energy
  • HER
  • MoS/graphene/NF
  • Tafel slope

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