物理化学学报 >> 2005, Vol. 21 >> Issue (06): 602-606.doi: 10.3866/PKU.WHXB20050605

研究论文 上一篇    下一篇

电化学阶边精饰法制备钯镍合金纳米线的研究

苑娟; 肖耀坤; 余刚; 胡波年; 叶立元   

  1. 湖南大学化学化工学院,长沙 410082; 湖南建材高等专科学校,衡阳 421008
  • 收稿日期:2004-10-11 修回日期:2004-12-10 发布日期:2005-06-15
  • 通讯作者: 余刚 E-mail:yuganghnu@sina.com

Pd-Ni Nanowires Prepared by Electrochemical Step-edge Decoration

YUAN Juan; XIAO Yao-kun; YU Gang; HU Bo-nian; YE Li-yuan   

  1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082; Hunan College of Building Materials, Hengyang 421008
  • Received:2004-10-11 Revised:2004-12-10 Published:2005-06-15
  • Contact: YU Gang E-mail:yuganghnu@sina.com

摘要: 运用连续恒电势三脉冲的电化学阶边精饰法在高定向石墨(HOPG)上制备钯镍合金纳米线阵列, 并研究了合金成分的影响因素. 结果表明,改变镀液组成可以调整钯镍合金成分,调整生长时间和生长电势来控制钯镍合金纳米线的直径. 用7 mmol•L-1 PdCl2,3 mmo•L-1 NiSO4, 0.2 mol•L-1 NH4Cl,pH 8.5的混合溶液,控制脉冲电势-2.0 V形核0.2 s,在脉冲电势-0.4 V生长1 h,可以获得平均直径为200 nm, 长度约400 μm的钯镍合金纳米线阵列, 纳米线的合金成分中镍含量为12.4%(质量分数,w).

关键词: Pd-Ni合金, 纳米线, 恒电势脉冲, 电化学阶边精饰法, 制备

Abstract: The arrays of Pd-Ni nanowires were prepared on highly oriented pyrolytic graphite by electrochemical step-edge decoration under the control of successive potentiostatic triple-pulse. The affecting factors on the composition of Pd-Ni alloy were investigated. The experimental results showed that the alloy composition of palladium and nickel could be adjusted by changing the ratio of Ni2+ and Pd2+ concentrations. The diameters of nanowires were controlled by adjusting the growing time and the growing potential. In the mixture of 7 mmol•L-1 PdCl2, 3 mmol•L-1 NiSO4 and 0.2 mol•L-1 NH4Cl,at pH 8.5,the arrays of Pd-Ni alloy nanowires with mean diameter of 210 nm, length about 400 μm and composition of Ni mass fraction of 12.4% were synthesized with the nucleating pulse of -2.0 V, 0.2 s and growing pulse of -0.4 V, 1 h.

Key words: Pd-Ni alloy, Nanowires, Potentiostatic pulse, Electrochemical step-edge decoration, Preparation