(福州大學(xué) 機(jī)械工程及自動(dòng)化學(xué)院，福州 350108)
摘 要: 在非晶/納米晶Ni-Mo合金鍍液中添加適量的LaCl3溶液，獲得了非晶/納米晶混合結(jié)構(gòu)的Ni-Mo-La合金電極。結(jié)果表明：稀土La元素的加入，有利于鍍層Mo含量的提高，形成非晶態(tài)Ni-Mo合金，細(xì)化鍍層晶粒，減小鍍層微應(yīng)變，并使鍍層表面積增加。在25 ℃、7 mol/L的NaOH溶液中的電化學(xué)實(shí)驗(yàn)表明：Ni-Mo-La合金電極比Ni-Mo合金電極具有更高的析氫催化活性，在電流密度為150 mA/cm2條件下，Ni-Mo-La合金電極的析氫過電位比Ni-Mo合金電極的降低了約80 mV。Ni-Mo-La合金具有儲氫材料的特性，其析氫過程含有吸氫—儲氫—脫附的過程。
關(guān)鍵字: 納米晶Ni-Mo-La合金；析氫性能；電沉積
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
