Preparation of Porous CoS₂ Nanostructures for Highly Efficient Electrocatalytic Hydrogen Evolution

Abstract:

In response to global energy and environmental issues, development of efficient and robust earth-abundant electrocatalysts for hydrogen evolution reaction is particularly meaningful. In this study, a facile hydrothermal method is developed to synthesize porous CoS₂ nanostructures by using sulfur powder and thiourea as sulfur sources on carbon cloths for highly efficient hydrogen evolution reactions. The huge load of CoS₂ on carbon cloth，their unique porous nanostructures equiped CoS₂ nanomaterials with excellent electrocatalytic properties. The remarkable HER catalytic performance was achieved with -67 mV at a current density -10 mA cm^-2 and the Tafel slope 62 mV dec^-1 in 0.5 M H₂SO₄ solution. The overpotential of HER only lost 2 mV after 1000 cycles with remarkable stability. I think this work opens up a low cost and scalable route to fabricate transition metal-based materials for application in electrocatalysis.

• Periodical: Materials Science Forum (Volume 944)
• Pages: 643-649
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.944.643
• Online since: January 2019
• Authors: Ka Wang, Hai Zeng Song, Wei Lan Guo, Shan Cheng Yan*
• Keywords: Cobalt Sulfides, Electrocatalyst, HER, Hydrothermal Synthesis, Porous

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