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<p>Combining graphite and MoS<sub>2</sub> to enhance the synergistic effect represents an effective strategy for improving the activity and stability of the hydrogen evolution reaction (HER). A one-step hydrothermal method with controlled reaction time was employed to synthesize a composite material with numerous defects (C@MoS<sub>2</sub>-<i>x</i>h). The experiment revealed that the graphite encapsulation structure effectively prevented delamination between MoS<sub>2</sub> layers, providing more accessible active sites and resulting in robust stability and conductivity of C@MoS<sub>2</sub>-<i>x</i>h composite material. Additionally, N<sub>2</sub> adsorption–desorption tests and electrochemically active surface area (EASA) measurements of catalysts, particularly C@MoS<sub>2</sub>-48&#xa0;h, demonstrated a larger specific surface area, which provides more interface areas and facilitates exchange interactions essential for HER. Electrochemical tests indicated that C@MoS<sub>2</sub>-48&#xa0;h exhibited optimal catalytic activity and a small Tafel slope of 63.7&#xa0;mV dec<sup>–1</sup>. Furthermore, C@MoS<sub>2</sub>-48&#xa0;h with enhanced defects produce strong electrocatalytic stability toward HER. This study offers insights for design of HER electrocatalysts by engineering the encapsulated structures with enhanced defects.</p> Graphical Abstract <p></p>

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Reinforcing the Hydrogen Evolution Reaction through Graphite-encapsulated MoS2 Structures with Enhanced Defects

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Chunli Li,
  • Fengzhen Zhang,
  • Zheng Liu,
  • Qiong Wang,
  • Shisi Yuan,
  • Aiai Zhang

摘要

Combining graphite and MoS2 to enhance the synergistic effect represents an effective strategy for improving the activity and stability of the hydrogen evolution reaction (HER). A one-step hydrothermal method with controlled reaction time was employed to synthesize a composite material with numerous defects (C@MoS2-xh). The experiment revealed that the graphite encapsulation structure effectively prevented delamination between MoS2 layers, providing more accessible active sites and resulting in robust stability and conductivity of C@MoS2-xh composite material. Additionally, N2 adsorption–desorption tests and electrochemically active surface area (EASA) measurements of catalysts, particularly C@MoS2-48 h, demonstrated a larger specific surface area, which provides more interface areas and facilitates exchange interactions essential for HER. Electrochemical tests indicated that C@MoS2-48 h exhibited optimal catalytic activity and a small Tafel slope of 63.7 mV dec–1. Furthermore, C@MoS2-48 h with enhanced defects produce strong electrocatalytic stability toward HER. This study offers insights for design of HER electrocatalysts by engineering the encapsulated structures with enhanced defects.

Graphical Abstract