聚苯胺包覆硒化镍的制备与析氢性能

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Abstract A two-step method of hydrothermal and electrochemical deposition was used to prepare a polyaniline-coated nickel selenide hydrogen evolution electrode (PANI/NiSe/NF) supported on nickel foam. The morphology, constitution and electrochemical properties of the as-prepared specimen were characterized by using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical tests. The results show that using nickel chloride as the nickel source, the needle-like NiSe supported on nickel foam was successfully prepared by hydrothermal method, and the coating of conductive polymer polyaniline has not change its morphology. The electric double layer capacitance of PANI/NiSe/NF electrode is 12 560 μF/cm², which is larger than that of the NiSe/NF electrode 9 200 μF/cm². PANI/NiSe/NF electrode has a larger electrochemically active area, 58 mV lower initial over potential for hydrogen evolution than uncoated NiSe/NF electrode and 133 mV/dec Tafel slope. PANI/NiSe/NF electrode exhibites a hydrogen evolution over potential of 203 mV at current density of 10 mA/cm², showing excellent hydrogen evolution catalytic activity. The coating of the conductive polymer PANI can not only improve the hydrogen evolution activity of NiSe/NF electrode, but also reduce the charge transfer resistance, and accelerate the charge transfer rate, and significantly improved the electrode stability.

Key words： nickel foam nickel selenide polyaniline electrochemical performance hydrogen evolution performance

Received: 29 January 2021 Published: 26 September 2021

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	BAI Yuting
	BAI Linghong
	LEI Ting

Cite this article:

BAI Yuting,BAI Linghong,LEI Ting. Preparation and hydrogen evolution performance of polyaniline coated NiSe electrode[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(4): 338-345.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I4/338

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