|
|
|
| Electrochemical properties of amorphous Ni-S-Co alloy in alkaline medium |
| ;; |
| 东北大学 |
|
Cite this article:
. Electrochemical properties of amorphous Ni-S-Co alloy in alkaline medium. Chin J Mater Res, 2008, 22(5): 505-509.
|
|
|
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.
|
|
Received: 10 December 2007
|
|
|
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. Appl.Electrochem.,28,4375(1993)
9 Q.Han,J.S.Chen,K.R.Liu,X.J.Wei,Electrodeposited Ni- S-Co alloy used as hydrogen evolution reaction cathode in water electrolysis,Acta Metalls Sin (English Letters),15, 405(2002)
10 Q.Han,K.R.Liu,J.S.Chen,X.J.Wei,A study on the elec- trodeposited Ni-S alloys as hydrogen evolution reaction cathodes,Int.J.Hydrogen Energy,28,1207(2003)
11 HU Weikang,ZHANG Yunshi,SONG Deying,Study of amorphous Ni-Mo-Fe alloy used as HER cathode in wa- ter electrolysis,Functional Materials,26,456(1995) (胡伟康，张允什，宋德瑛，非晶态Ni-Mo-Fe合金用作水电解析氢阴极的研究，功能材料，26，456(1995))
12 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. Appl.Electrochem.,28,4375(1993)
13 I.Paseka,Evolution of hydrogen and its sorption on re- markable active amorphous smooth Ni-P_((x)) electrodes, Electrochem.Acta,40,1633(1995)
14 J.D.Carvalho,G.Tremiliosi-Filho,L.A.Avaca,Electrode materials and processes for energy conversion and storage, J.Electrochem.Soc.,87,356(1987)
15 B.E.Conway,Theory and Principles of Electrodes Processes (New York,Ronald Press,1965) p.174
16 H.Vandenborre,Ph.Vermeiren,R.Leysen,Hydrogen evo- lution at nickel sulphide cathodes in alkaline medium, Electrochim.Acta,29,297(1984) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
