材料研究学报  2008, Vol. 22 Issue (5): 505-509

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非晶态Ni-S-Co合金的制备和电化学性能

韩庆;陈向强;刘奎仁;陈建设;魏绪钧

东北大学材料与冶金学院

Electrochemical properties of amorphous Ni-S-Co alloy in alkaline medium

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东北大学

韩庆; 陈向强; 刘奎仁; 陈建设; 魏绪钧 . 非晶态Ni-S-Co合金的制备和电化学性能[J]. 材料研究学报, 2008, 22(5): 505-509.

摘要 参考文献 相关文章 Metrics 全文: PDF(621 KB)   摘要: 用电沉积方法制备非晶态Ni-S-Co合金镀层, 研究了镀层的电化学性能. 结果表明,与非晶态Ni--S合金相比, Co的引入可提高镀层中S的含量.在析氢反应中非晶态Ni--S--Co合金电极具有很高的电化学活性,电流密度为150 mA×cm-2时其析氢过电位仅为70 mV,比非晶态Ni-S合金低20 mV.在长时间电解过程中S发生溶出反应有助于提高电极的表面粗糙程度, 是提高电极析氢活性的重要原因之一. 在析氢过程中,非晶态Ni--S--Co合金电极吸附大量的H原子, 使反应的活化能降低,这是其析氢活性高的主要原因. 非晶态Ni--S--Co合金镀层的析氢机理为电化学脱附机理,即一快速的Volmer反应(电化学步骤)和一较慢的Heyrovsky反应(电化学脱附步骤). 关键词 ： 金属材料,  Ni-S-Co合金,  电沉积     Abstract：Ni-S-Co alloy was obtained through electrodeposition in a modified Watts bath by adding thiourea (TU) and CoCl2 into the bath. The amorphous structure was determined by XRD. The contents of S and Co were measured by EPMA. The electrochemical parameters such as the hydrogen evolution reaction overvoltage (η) being 70 mV at 150 mA•cm-2, the Tafel slope b, the exchange current density i0 and the activation energies ΔH* were obtained. Much higher electrochemical activity of amorphous Ni-S-Co cathode than other electrodes including amorphous Ni-S electrode is determined. The results that the HER mechanism is a fast Volmer reaction following a slow Heyrovsky reaction and the high electrocatalytic HER property is mainly due to the large amount of adsorbed H atoms is obtained by the steady-state behaviors of amorphous Ni-S-Co alloy in alkaline media at various pH and the cyclic voltammetric curves. Key words： 收稿日期: 2007-12-10      ZTFLH:  TG146   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 韩庆 陈向强 刘奎仁 陈建设 魏绪钧 44.8K 链接本文: https://www.cjmr.org/CN/Y2008/V22/I5/505 1 Norsk Hydro Oslo,Electrolyte cell active cathode with low overvoltage,Nederlands Patent No.7801955,1978 2 F.Hine,M.Yasuda,M.Watanabe,Studies of the nickel- sulfur electrodeposited cathode,Denki Kagaku,47, 401(1979) 3 E.R.Gonsalez,L.A.Avaca,G.Tremiliosi-Filho,Hydrogen evolution reaction on Ni-S electrodes in alkaline solutions, Int.J.Hydrogen Energy,19,17(1994) 4 T.C.Wen,S.M.Lin,J.M.Tsai,Sulfur content and the hy- drogen evolution activity of NiSx deposits using statistical experimental strategies,Journal of Applied Electrochem- istry,24,233(1994) 5 T.Valand,T.Burchardt,T.Grontoft,Structure and cat- alytic behavior of NiS_x films with respect to the hydrogen evolution,Int.J.Hydrogen Energy,27,39(2002) 6 DU Min,GAO Rongjie,The mechanism of hydrogen evo- lution reaction of amorphous Ni-S alloy coating,Journal of Ocean University of Qingdao,33,961(2003) (杜敏，高荣杰，非晶态Ni-S合金在碱液中析氢反应(HER)机理的研究，青岛海洋大学学报，33，961(2003)) 7 LIU Fang,HE Hanwei,ZHOU Kechao,YUAN Tiechui, LIU Hongjiang,LI Jun,Dependences of sulfur content during electro-deposition of Ni-S alloy,Materials Science and Engineering of Powder Metallurgy,10,60(2005) (刘芳，何捍卫，周科朝，袁铁锤，刘红江，李军，电沉积Ni-S合金硫含量的影响因素，粉末冶金材料与工程，10，60(2005)) 8 I.A.Raj,Nickel-based,binary-composite electrocatalysts for the cathodes in the energy-efficient industrial produc- tion of hydrogen from alkaline-water electrolytic cells,J. 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