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高等学校化学研究 ›› 2003, Vol. 19 ›› Issue (3): 290-293.

• Articles • 上一篇    下一篇

Voltammetric Studies on Heteropoly Phosphotungstovanadate Anions Across the Liquid/Liquid Interface

LU Xiao-quan   

  1. Institute of Chemistry, Northwest Normal University, Lanzhou 730070, P. R. China
  • 收稿日期:2002-06-18 出版日期:2003-08-24 发布日期:2011-08-06
  • 基金资助:

    Supported by the Natural Science Foundation of China(No.20275031), the Teaching and Research Award Program for Outstanding Young Techers in High Education of MOE of China and KJCX-01 of Northwest Normal University.

Voltammetric Studies on Heteropoly Phosphotungstovanadate Anions Across the Liquid/Liquid Interface

LU Xiao-quan   

  1. Institute of Chemistry, Northwest Normal University, Lanzhou 730070, P. R. China
  • Received:2002-06-18 Online:2003-08-24 Published:2011-08-06
  • Supported by:

    Supported by the Natural Science Foundation of China(No.20275031), the Teaching and Research Award Program for Outstanding Young Techers in High Education of MOE of China and KJCX-01 of Northwest Normal University.

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被引次数

1

摘要： Electrochemical transfer behavior of VⅤW11-V3ⅤW9 heteropoly anions on the water/nitrobenzene interface was investigated by means of cyclic voltammetry. The effect of the solution acidity on the transfer behavior and the stable pH range for the heteropoly anions were studied. The stability of mixed tungstovanadate decreases with increasing the number of vanadium atoms. The main transfer species within the potential window have the negative charges of 4 and the transfer process is diffusion-controlled. The apparent transfer potential ΔwoΨ0 and the free energy ΔG0trw→o for the heteropoly anions can be obtained from the experimental data. For the different anions, the ΔwoΨ1/2-pH relationship can be expressed as: ΔwoΨ1/2=constant-53pH.

关键词: Heteropoly phosphotungstovanadate anion, Voltammetry, Liquid/liquid interface

Abstract: Electrochemical transfer behavior of VⅤW11-V3ⅤW9 heteropoly anions on the water/nitrobenzene interface was investigated by means of cyclic voltammetry. The effect of the solution acidity on the transfer behavior and the stable pH range for the heteropoly anions were studied. The stability of mixed tungstovanadate decreases with increasing the number of vanadium atoms. The main transfer species within the potential window have the negative charges of 4 and the transfer process is diffusion-controlled. The apparent transfer potential ΔwoΨ0 and the free energy ΔG0trw→o for the heteropoly anions can be obtained from the experimental data. For the different anions, the ΔwoΨ1/2-pH relationship can be expressed as: ΔwoΨ1/2=constant-53pH.

Key words: Heteropoly phosphotungstovanadate anion, Voltammetry, Liquid/liquid interface