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Citation: ZHAO Peng, FANG Hui-jue, XUE Teng, QI Xi-min, LU Jia-xing. Diffusion Coefficients and Rate Constants of NiCl₂(bpy)₃ in DMF Determined by Chronocoulometry[J]. Acta Physico-Chimica Sinica, ;2005, 21(11): 1235-1239. doi: 10.3866/PKU.WHXB20051108 shu

Diffusion Coefficients and Rate Constants of NiCl₂(bpy)₃ in DMF Determined by Chronocoulometry

1.
Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, Shanghai 200062

Received Date: 24 March 2005
Available Online: 15 November 2005

The electrochemical characteristic of NiCl₂(bpy)₃ at glassy carbon electrode in DMF has been investigated by using cyclic voltammetry. Chronocoulometry was employed to determine the diffusion coefficients and the rate constants (k_f and k⁰). The CV results imply that the redox reaction of NiCl₂(bpy)₃ at glassy carbon electrode is quasi-reversible. The diffusion coefficient increased with the increase of temperature between 302.15 K and 334.15 K. The forward rate constants (k_f) at different potentials and standard rate constants (k⁰) at different temperatures were also obtained by analysis of charge-time data. According to the slope of lnk0 against T^-1, the activation energy (E_a) of the electron transfer was 14.4 kJ•mol^-1.
- Nickel complex;Chronocoulometry;Rate constant;Diffusion coefficient; Activation energy
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Diffusion Coefficients and Rate Constants of NiCl2(bpy)3 in DMF Determined by Chronocoulometry

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Diffusion Coefficients and Rate Constants of NiCl₂(bpy)₃ in DMF Determined by Chronocoulometry