Copper Sulfide Nanospheres Were Prepared as Efficient Water-Splitting Electrocatalysts
摘要
Hydrogen production by electrolysis of water is a clean and efficient green hydrogen production technology. The core of improving hydrogen production efficiency is to obtain electrocatalysts with excellent performance. In this study, CuS/NF material was synthesized by one-step hydrothermal method as a hydrogen evolution catalyst, and its performance was evaluated by physical characterization, electrochemical test, and first-principles calculation. The CuS/NF hydrogen evolution catalyst has a nano-spherical spatial structure. This special structure increases the area of electrocatalytic activity, facilitates electron transfer, and improves HER efficiency. When the current density is 10 mV/cm2, the overpotential is 156 mV, the Tafel slope is 121.43 mV/dec, the electrocatalytic activity area is 177.5 cm2, the charge transfer resistance is 13.424 Ω, and the material maintains stability over 12 h. The hydrogen evolution performance of the CuS/NF electrode is better than that of the blank nickel foam electrode. This experiment provides new ideas and directions for the application and progress of copper-based catalysts in the field of hydrogen evolution from electrolytic water.