聚苯胺包覆硒化镍的制备与析氢性能

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摘要采用水热和电化学沉积两步法制备泡沫镍(NF)负载的聚苯胺(PANI)包覆硒化镍(NiSe)析氢电极(PANI/NiSe/NF),利用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射(XRD)、X射线光电子能谱仪(XPS)以及电化学测试等手段对材料进行形貌、组成及电化学性能表征。结果表明,以氯化镍为镍源,用水热法可制备出泡沫镍负载的针状NiSe,使用导电聚合物聚苯胺包覆不改变其形貌。PANI/NiSe/NF电极的双电层电容为12 560 μF/cm²,大于NiSe/NF电极的9 200 μF/cm²,拥有更大的电化学活性面积,其析氢起始过电位比未包覆时降低了58 mV,Tafel斜率为133 mV/dec。电流密度为10 mA/cm²时,PANI/NiSe/NF电极的析氢过电位为203 mV,展示出优异的析氢催化活性。导电聚合物PANI的包覆不仅可提高硒化镍电极的析氢活性,而且可减小电荷转移电阻,加快电荷转移速率,并显著提高电极稳定性。

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	白玉婷
	柏凌鸿
	雷霆

关键词 ：泡沫镍, 硒化镍, 聚苯胺, 电化学性能, 析氢性能

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

收稿日期: 2021-01-29 出版日期: 2021-09-26

ZTFLH:

TM912

基金资助:国家重点研发计划资助项目(2019YFB1504502)

通讯作者: 雷霆,教授,博士。电话：15974242599;E-mail: tlei@csu.edu.cn

引用本文:

白玉婷, 柏凌鸿, 雷霆. 聚苯胺包覆硒化镍的制备与析氢性能[J]. 粉末冶金材料科学与工程, 2021, 26(4): 338-345.
BAI Yuting, BAI Linghong, LEI Ting. Preparation and hydrogen evolution performance of polyaniline coated NiSe electrode. Materials Science and Engineering of Powder Metallurgy, 2021, 26(4): 338-345.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2021/V26/I4/338

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