A novel structure of Ni-(MoS2/GO) composite coatings deposited on Ni foam under supergravity field as efficient hydrogen evolution reaction catalysts in alkaline solution. (20th September 2017)

• Record Type: Journal Article
• Authors: Yin, Xucai; Sun, Gang; Song, Ailong; Wang, Lixin; Wang, Yazhou; Dong, Haifeng; Shao, Guangjie
• Is Part Of: Electrochimica acta. Volume 249(2017)
• Page Start: 52
• Page End: 63
• Publication Date: 2017-09-20
• Subjects: MoS2/GO hybrid -- Ni-(MoS2/GO) composite coatings -- supergravity field -- hydrogen evolution reaction -- electrocatalytic activity; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.08.010
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: 3D hierarchical nanostructures Ni-(MoS2 /GO) is prepared. Depositing under supergravity fields has been applied. The activity of Ni-(MoS2 /GO) is better than that of Ni-GO and Ni-MoS2 . Low overpotential, small Tafel slope, and superior durability are achieved. Abstract: We report a novel and simple approach to synthesis highly efficient and stable electrochemical catalyst of Ni-(MoS2 /GO) composite coatings by electrodeposition from aqueous solution with the nickel sulphamate precursor. Depositing under supergravity fields has been applied to scatter more MoS2 /GO hybrids in the coatings and decrease the size of nickel particles as far as possible and increase large amount of exposed active sites. In 1.0 M NaOH solution, Ni-(MoS2 /GO) only needs overpotentials as low as −33 mV and −132 mV at a current density of −10 mA cm −2 and −100 mA cm −2, respectively. The behavior of Ni-(MoS2 /GO) exceeds most of the same reported HER catalysts in previously literature. In addition, we also synthesized Ni-MoS2, Ni-GO and pure Ni catalysts use the same method. The results show that Ni-(MoS2 /GO) exhibited better HER activity at a current density of −100 mA cm −2 than these catalysts. In the future research field of HER catalysis materials, the development of this material may be not limited to nickel based materials, also will be used in Fe, Co and other non noble metal based materials, outlining a general approach for the synthesis of nanostructured M-(MoS2 /GO) as a class of new catalyst with efficient HER activity.