One-step synthesis of the 3D flower-like heterostructure MoS2/CuS nanohybrid for electrocatalytic hydrogen evolution. (18th January 2018)

• Record Type: Journal Article
• Authors: Zhang, Lilan; Guo, Yali; Iqbal, Anam; Li, Bo; Gong, Deyan; Liu, Wei; Iqbal, Kanwal; Liu, Weisheng; Qin, Wenwu
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 3(2018)
• Page Start: 1251
• Page End: 1260
• Publication Date: 2018-01-18
• Subjects: MoS2/CuS nanohybrids -- One step -- Hydrothermal method -- HER -- High activity; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.09.184
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, a facile one-step hydrothermal method was developed to fabricate three types different of nanomaterials: the two-dimension (2D) of MoS2 nanosheets; 3D spherical CuS nanoparticles; and 3D flower-like heterostructure of MoS 2 /CuS nanohybrid, respectively. The as-synthesized MoS2, CuS and MoS2 /CuS were characterized by transmission electron microscopy (TEM), field emission scanning electron microscopy (SEM) and X-ray diffraction (XRD) etc. The morphology of the MoS2 /CuS nanohybrid is different from the MoS2 nanosheets and CuS nanoparticles. The hydrogen evolution reaction (HER) activity of MoS2 nanosheets, CuS nanoparticles and MoS2 /CuS nanohybrid, were investigated by the Linear Sweep Voltammetry (LSV) and Tafel slope. The HER activity of MoS2 /CuS nanohybrid is better than those of MoS2 nanosheets and CuS nanoparticles, which can be attributed to the good electron-transport ability of CuS and the strong reduction ability of hydrogen ions by MoS2 . Thus, MoS2 /CuS nanohybrid exhibited excellent activity for HER with a small onset potential of 0.15 V, a low Tafel slope of 63 mV dec −1, and relatively good stability. However, the MoS2 nanosheets and CuS nanoparticles respectively shows a bigger onset potential of 0.25 V and 0.35 V, a higher Tafel slope of 165 and 185 mV dec −1 . This 3D flower-like heterostructure of MoS2 /CuS nanohybrid catalyst exhibits great potential for renewable energy applications. Graphical abstract: Highlights: The MoS2 nanosheets, CuS nanoparticles and MoS2 /CuS nanohybrids were synthesized and well characterized. The MoS2 /CuS nanohybrids were applied to catalyze the HER. The MoS2 /CuS has a better catalytic property than MoS2 and CuS. We analyzed the three nanomaterials catalytic theory for the HER. The MoS2 /CuS nanohybrids of repeatability was investigated.