In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 39 ( 2022), p. 21013-21020
Kurzfassung:
Obtaining highly stable 1T-MoS 2 is very crucial to investigate the hydrogen evolution reaction (HER) due to the thermodynamically metastable characterization of 1T-MoS 2 . Currently, the preparation of pure phase and stable 1T-MoS 2 is a big challenge, which limits the investigation of MoS 2 as an electrocatalyst for better HER performance. In this study, highly stable MoS 2 with different 1T content was prepared by magneto-hydrothermal synthesis, showing that the pure 1T-MoS 2 has the best HER performance with an overpotential of 189 mV at the current density of 10 mA cm −2 amongst the MoS 2 electrocatalysts with different 1T content. Furthermore, magneto-hydrothermal-synthesized highly stable and pure 1T-MoS 2 was modified with Ru nanoparticles to improve the HER activity, delivering very low overpotential of 81 mV at a current density of 10 mA cm −2 , small Tafel slope of 54 mV dec −1 as well as long stability. Theoretical analysis based on density functional theory shows that 1T-MoS 2 has a lower Gibbs free energy change of adsorbed hydrogen (Δ G H* ) (1.26 eV) as compared with that of 2H-MoS 2 (1.96 eV), and 1T-MoS 2 with Ru modification will obviously suppress the Δ G H* (0.02 eV). This work confirms that 1T-MoS 2 is efficient as an HER catalyst and Ru modification can further improve the electrocatalytic HER activity.
Materialart:
Online-Ressource
ISSN:
2050-7488
,
2050-7496
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2022
ZDB Id:
2702232-8
