Janus (Mo-Mo2C)@C heterostructure as an efficient electrocatalyst for the hydrogen evolution reaction in acidic and alkaline media

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • Weiwei Zhu
  • Zhongya Jiang
  • Zhaorong Li
  • Abebe Reda Woldu
  • Fushen Lu
  • Yiwen Fang
  • Liangsheng Hu


Original languageEnglish
Article number055704
Journal / PublicationNanotechnology
Issue number5
Online published17 Nov 2022
Publication statusPublished - 29 Jan 2023


To explore low-cost, high-efficiency, and noble-metal-free catalysts for electrocatalytic water splitting in both acidic and alkaline media, the metal-metal carbide Janus hierarchical structure comprising Mo and β-Mo2C embedded on a carbon layer (Mo-Mo2C)@C is synthesized by a hydrothermal reaction and subsequent low-temperature magnesium thermic process. Systematic characterization by XRD, XPS, Raman scattering, and SEM/TEM reveals the successful formation of metallic Mo and β-Mo2C nanoparticles. The synthesized (Mo-Mo2C)@C has a large specific surface area and boasts highly efficient hydrogen evolution reaction activity including low overpotentials of 152 and 171 mV at a current density of 10 mA cm−2 and small Tafel slopes of 51.7 and 63.5 mV dec−1 in acidic and alkaline media, respectively. In addition, the catalyst shows outstanding stability for 48 h in both acidic and alkaline media. The excellent catalytic activity originates from more active sites and greater electron conductivity bestowed by the carbon layer, which also improves the long-term stability in both acidic and alkaline solutions.

Research Area(s)

  • electrocatalyst, hydrogen evolution reaction, janus (Mo/β-Mo2C)@C heterojunction, magnesium thermic reaction

Citation Format(s)