Acta Chimica Sinica ›› 1990, Vol. 48 ›› Issue (8): 801-805. Previous Articles     Next Articles

Original Articles

磷钼钒杂多阴离子的液/液界面电化学研究

汪尔康;刘玉清   

  1. 中国科学院长春应用化学研究所
  • 出版日期:1990-08-15 发布日期:1990-08-15

Electrochemical behavior of heteropoly phosphomolybdovanadate anions at the liquid/liquid interface

WANG ERKANG;LIU YUQING   

  • Online:1990-08-15 Published:1990-08-15

Electrochem. transfer behavior of the VVMo11-V5VMo7 heteropolyanions at the water/nitrobenzene interface was investigated by using cyclic voltammetry. The effect of the solution acidity on the transfer behavior and the stable pH range of heteropolyanions were observed Mixed molybdovanadate anions are more stable than 12-molybdophosphoric acid, however, the stability of the former decreases with increasing no. of V atoms. The main transfer species within the "potential window" has the neg. charges of 4 and the transfer process is diffusion controlled. The apparent transfer potential and the free energy, for heteropolyanions can be obtained through the voltammetric data. For different anions, the E1/2-pH relationship can be described as E1/2 = A - 37 pH.

Key words: VANADATE, HETEROPOLYACID, MOLYBDATE, PHOSPHATE, ANION, ELECTROCHEMISTRY, CYCLOVOLTAMGRAPH, INTERFACIAL TRANSFER

CLC Number: