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Citation: KONG Jing-Lin, XUE Kuan-Hong, HE Chun-Jian, SHAO Ying, CHEN Qiao-Ling. AC Impedance of a Nickel Nanowire Electrode[J]. Chinese Journal of Applied Chemistry, ;2002, 19(4): 313-316. shu

AC Impedance of a Nickel Nanowire Electrode

1.
Department of Chemistry, Nanjing Normal University, Nanjing 210097

Corresponding author: XUE Kuan-Hong,
Received Date: 16 September 2001
Available Online: 4 February 2002
Fund Project: 国家自然科学基金(29973014) (29973014)江苏省自然科学基金(BK99062)资助项目 (BK99062)

Electrochemical impedance spectra of a nickel nanowire electrode at different applied potentials and their fitting results are given. The experimental results revealed that the electro chemical processes on the surface of the electrode were apparently influenced by the applied potentials. The electrochemical oxidation rate of Ni(Ⅱ) to Ni(Ⅲ) increased remarkably with the applied potential at a range of 0.10~0.40 V(vs.Ag/AgCl(1 mol/L KCl)). When the applied potential was higher than 0.4 V, the oxygen evolution reaction occurred simultaneously. The AC impedance measurements on a nickel bulk electrode and a nickel nanowire electrode under the same conditions showed the latter had much greater electrochemical activity and much faster reaction rate in the surface processes.
- nickel nanowires,
- AC impedance,
- electrode,
- secondary battery
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