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    Pd coated MoS2 nanoflowers for highly efficient hydrogen evolution reaction under irradiation

    Year: 2015

    Journal: JOURNAL OF POWER SOURCES, Vol. 284, p 68-76, 20170208

    Authors: Li, B. B.; Qiao, S. Z.; Zheng, X. R.; Yang, X. J.; Cui, Z. D.; Zhu, S. L.; Li, Z. Y.; Liang, Y. Q.

    Organizations: Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China; Tianjin Key Lab Composite & Funct Mat, Tianjin 300072, Peoples R China; Minist Educ, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China

    Pd nanoparticles modified MoS2 nanoflowers assembled by lamellar nanosheets have been successfully synthesized by a facile hydrothermal method. They were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), atomic force microscopy (AFM, Nanoscope III), X-ray photoelectron spectroscopy (XPS), and evaluated as electrochemical catalysts for hydrogen evolution reaction (HER). It was found that Pd modified MoS2 (MoS2-Pd) without calcinated treatment exhibited high HER activity. The HER activity of this catalyst can be improved after visible-light irradiation. As a novel HER catalyst, the MoS2 Pd under illumination exhibited the best activity with the highest TOF value (0.013 s(-1)) and the lowest Tafel slope (39 mV dec(-1)). The results indicate that noble metal Pd plays an important role in promoting the HER activity. The increasing creation of electrons by visible-light irradiation is favorable for the electrochemical hydrogen adsorption reaction, which leads to more hydrogen formation. This work demonstrates the feasibility of increasing HER activity of MoS2-based catalysts by combining MoS2 with Pd noble metal nanoparticles. (C) 2015 Elsevier B.V. All rights reserved.