A novel co-electrodeposited Co/MoSe2/reduced graphene oxide nanocomposite as electrocatalyst for hydrogen evolution. (26th July 2019)

• Record Type: Journal Article
• Authors: Khajehsaeidi, Zahra; Sangpour, Parvaneh; Ghaffarinejad, Ali
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 36(2019)
• Page Start: 19816
• Page End: 19826
• Publication Date: 2019-07-26
• Subjects: Molybdenum diselenide -- Reduced graphene oxide -- Nanocomposite -- Hydrogen evolution -- Electrodeposition -- Electrocatalyst; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.05.161
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this study, a simple and fast electrochemical method was employed to synthesis molybdenum diselenide thin film. The morphology, structure and chemical composition of the nanocomposites were investigated by field emission scanning electron microscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The progressive effects of transition metal ions including Ni, Cu, and Co were surveyed on the hydrogen evolution activity of MoSe2 thin films. Co/MoSe2 nanocomposite thin films has significant electrocatalytic activity as compared to other samples, In order to achieve higher performance, preparing Co/MoSe2 /RGO nanocomposite thin film, two strategies including layer by layer electrodeposition and co-electrodeposition has been employed. The presence of reduced graphene oxide leading to the onset potential shifts to more positive values and increase the current density. Also, results showed that the Co/MoSe2 /RGO nanocomposite prepared by co-electrodeposition exhibits the best electrochemical hydrogen evolution at onset potential of −0.18 with an overpotential of −0.45 V. Graphical abstract: Image 1 Highlights: Simple, rapid, and efficient method to synthesis thin layer via co-electrodeposition procedure. Improving electrochemical HER catalytic activity of MoSe2 films. Significant electrocatalytic activity of Co/MoSe2 nanocomposite thin films. The synergic effects of Co and RGO on increasing electrocatalyst activity and H2 evolution.