Direct growth of high-content 1T phase MoS2 film by pulsed laser deposition for hydrogen evolution reaction

• Published in: Applied surface science Vol. 504; p. 144320
• Main Authors: Wang, Ruijing, Shao, Qiang, Yuan, Qin, Sun, Peng, Nie, Rongrong, Wang, Xuefeng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 28-02-2020
• Subjects: 1T phase MoS2; Hydrogen evolution reaction; Pulsed laser deposition; Sulfur addition; 1T phase MoS2; Hydrogen evolution reaction; Sulfur addition; Pulsed laser deposition
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2019.144320

High-content 1T phase MoS2 film is obtained by pulsed laser deposition for hydrogen evolution reaction.
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•Bulk MoS2 is exfoliated to form MoS2 film.•High-content 1T phase MoS2 film is prepared by adding sulfur in MoS2 target.•The obtained film showed high electrochemical activity of HER.
The modified MoS2-based material, with a higher conductivity and rich active sites, is promising one of a variety of nonprecious-metal electrocatalysts for hydrogen evolution reaction (HER). Here, the bulk MoS2 is exfoliated to form small-size MoS2 clusters by pulse laser, which are diluted in solid sulfur and further to form porous film. The 1T phase MoS2 ratio in the prepared film was modulated by adding the different content of sulfur into MoS2 target. Besides, this addition also has an effect on the pore structure of films. Finally, the obtained high-content 1T phase MoS2 film provides the highly metallic conductivity and more active sites, which results in the more enhanced HER catalytic activity with a lower Tafel slope of 38 mV dec−1, a smaller overpotential of 151 mV at 10 mA cm−2, compared with the pure MoS2 film.