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<p>MoS<sub>2</sub>, with its abundant natural occurrence, low cost, tunable electronic properties and unique chemical stability, was an ideal catalyst for the hydrogen evolution reaction (HER) in water electrolysis processes. This work used natural molybdenite as the raw material and prepared few-layer MoS<sub>2</sub> nanosheets through electrochemical exfoliation and ultrasonic exfoliation, which enhanced their HER performance. Subsequently, by annealing MoS<sub>2</sub> in a reductive atmosphere at high temperatures to create a certain amount of sulfur vacancies, it was found that the number of sulfur vacancies in MoS<sub>2</sub> was positively correlated with its HER performance. The sample annealed at 900&#xa0;°C exhibited the best HER performance, with the overpotential further reduced from 369 to 334&#xa0;mV (@ <i>j</i><sub>0</sub> = 10&#xa0;mA/cm<sup>2</sup>). This work efficiently utilized natural molybdenite to prepare MoS<sub>2</sub> nanosheets and further enhanced their HER performance. This increased the added value of molybdenite and had significant implications for the development and comprehensive utilization of mineral resources.</p> Graphical abstract <p></p>

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High hydrogen evolution reaction performance of MoS2 nanosheets with sulfur vacancies synthesized from natural molybdenite

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • Weichao Zhang,
  • Ke Wang,
  • Ye Tian,
  • Libing Liao,
  • Hao Liu

摘要

MoS2, with its abundant natural occurrence, low cost, tunable electronic properties and unique chemical stability, was an ideal catalyst for the hydrogen evolution reaction (HER) in water electrolysis processes. This work used natural molybdenite as the raw material and prepared few-layer MoS2 nanosheets through electrochemical exfoliation and ultrasonic exfoliation, which enhanced their HER performance. Subsequently, by annealing MoS2 in a reductive atmosphere at high temperatures to create a certain amount of sulfur vacancies, it was found that the number of sulfur vacancies in MoS2 was positively correlated with its HER performance. The sample annealed at 900 °C exhibited the best HER performance, with the overpotential further reduced from 369 to 334 mV (@ j0 = 10 mA/cm2). This work efficiently utilized natural molybdenite to prepare MoS2 nanosheets and further enhanced their HER performance. This increased the added value of molybdenite and had significant implications for the development and comprehensive utilization of mineral resources.

Graphical abstract