电沉积Ni-S、Ni-P-S合金析氢阴极的研究

摘要在电沉积法制备Ni-S合金电极的基础上,向镀液中添加次亚磷酸钠制备了Ni-P-S合金电极。电化学测试结果表明,Ni-P-S和Ni-S合金电极的催化性能都要好于其它电极,Ni-P-S合金电极的性能随着次亚磷酸钠质量浓度的升高而降低。计算了电极的电极反应动力学参数(包括Tafel斜率b、交换电流密度0ρ和过电位η),解释了Ni-P-S合金电极和Ni-S合金电极在不同电流密度区活性不同的原因。恒电流电解表明,Ni-P-S合金电极具有较高的稳定性。电极的微观形貌用SEM进行表征,成份用能谱进行分析,通过X射线衍射分析电极的晶型结构。

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	马强
	巴俊洲
	蒋亚雄
	李军
	吴文宏

关键词： Ni-S合金电极 Ni-P-S合金电极电催化活性过电位

Abstract： On the basis of Ni-S alloy electrode made by electrodeposition method, Ni-P-S alloy electrode was obtained by adding sodium hypophosphite monohydrate into the bath.The tested electrochemical properties show that electrochemical activities of Ni-P-S alloy electrode and Ni-S alloy electrode are much higher than those of other electrodes,the increment of sodium hypophosphite monohydrate concentration would reduce the activity of Ni-P-S alloy electrode.Furthermore,the corresponding electrode kinetic parameters,such as Tafel slope b,the exchange current density ρ~0 and the overpotential η,were calculated,then the reason why Ni-P-S alloy electrode and Ni-S alloy electrode had different activity in different current density area was explained.The high electrochemical stability of Ni-P-S alloy electrode was determined by constant-current electrolysis.Finally,The micrographs of electrode surface were investigated by SEM.The mass contents of elements in coatings were measured by EDS,and the structure of alloy cathodes were analyzed by XRD.

Keywords： Ni-S alloy electrode Ni-P-S alloy electrode electrocatalytic activity overpotential

Received 2008-11-15; published 2008-11-15

引用本文:

马强;巴俊洲;蒋亚雄;李军;吴文宏;.电沉积Ni-S、Ni-P-S合金析氢阴极的研究[J]. 化学工业与工程, 2008,25(6): 475-479

MA Qiang,BA Jun-zhou,JIANG Ya-xiong,LI Jun,WU Wen-hong.Study on Electrodeposited Ni-S and Ni-P-S Alloy Cathodes for Hydrogen Evolution[J]. Chemcial Industry and Engineering, 2008,25(6): 475-479