Abstract
Abstract
Because nickel-sulfide based electrode materials are regarded as appealing hydrogen evolution reaction (HER) electrocatalysts, various strategies have been designed to enhance their HER activity. Herein, we adopt a simple electrodeposition method to synthesize amorphous nickel sulfide electrocatalysts. Through altering the added amounts of electroplating bath consisting of NiCl2 and thiourea (TU), the HER electrocatalytic activity in alkaline electrolyte of these nickel sulfides can be optimized, and it exhibits a low overpotential of 130 mV at a current density of −10 mA cm−2, a small Tafel slope of 91 mV dec−1, and high electrochemical stability. The experimental analysis and density functional theory calculations suggest that the excellent electrochemical activity is ascribed to the coordination regulation of Ni nanostructures decorated with sulfur and oxygen anions. These findings demonstrate a simple and effective method to explore high efficiency electrocatalysts to HER.
Funder
National Key R&D Program of China
National Natural Science Foundation of China
Ten Thousand Talents Plan of Zhejiang Province of China
Laboratory of Solid State Microstructures of Nanjing University
Fundamental Research Funds for the Provincial Universities of Zhejiang
Subject
Surfaces, Coatings and Films,Acoustics and Ultrasonics,Condensed Matter Physics,Electronic, Optical and Magnetic Materials
Cited by
3 articles.
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