(福州大学 机械工程及自动化学院，福州 350108)
摘 要: 在非晶/纳米晶Ni-Mo合金镀液中添加适量的LaCl3溶液，获得了非晶/纳米晶混合结构的Ni-Mo-La合金电极。结果表明：稀土La元素的加入，有利于镀层Mo含量的提高，形成非晶态Ni-Mo合金，细化镀层晶粒，减小镀层微应变，并使镀层表面积增加。在25 ℃、7 mol/L的NaOH溶液中的电化学实验表明：Ni-Mo-La合金电极比Ni-Mo合金电极具有更高的析氢催化活性，在电流密度为150 mA/cm2条件下，Ni-Mo-La合金电极的析氢过电位比Ni-Mo合金电极的降低了约80 mV。Ni-Mo-La合金具有储氢材料的特性，其析氢过程含有吸氢—储氢—脱附的过程。
关键字: 纳米晶Ni-Mo-La合金；析氢性能；电沉积
electrodeposited amorphous/nanocrystalline Ni-Mo-La alloy electrode
（College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China）
Abstract:The amorphous/nanocrystal Ni-Mo-La alloy coating electrode was obtained in alkaline solution from amorphous/nanocrystal Ni-Mo deposited solution with an appropriate addition of LaCl3. The experimental results show that the addition of La improves the Mo atom content of the deposits, the amorphous Ni-Mo phase formation, the refining grain size and the micro-strain decrease with the real surface area increasing. The electrochemical tests at 25 ℃, 7 mol/L NaOH solution show that the hydrogen evolution activity of the Ni-Mo-La electrode is higher than that of Ni-Mo electrode. When the current is 150 mA/cm2, the electrode hydrogen evolution overpotential of Ni-Mo-La alloy is lower about 80 mV than that of Ni-Mo electrode. The Ni-Mo-La alloy has a property of hydrogen storage materials, and its hydrogen evolution reaction is a adsorption hydrogen—hydrogen storage—desorption hydrogen process.
Key words: nanocrystal Ni-Mo-La alloy; hydrogen evolution reaction activity; electrodeposition
