Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (06): 602-606.doi: 10.3866/PKU.WHXB20050605

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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

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