The catalytic effect of Mo-V on the oxidation of iodide by chlorate

被引：7

作者：

Villata, LS ^{[1
]}

Martire, DO ^{[1
]}

Capparelli, AL ^{[1
]}

机构：

[1] NATL UNIV LA PLATA,FAC CIENCIAS EXACTAS,DEPT QUIM,INST INVEST FISICOQUIM TEOR & APLICADAS,RA-1900 LA PLATA,ARGENTINA

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1997年 / 123卷 / 2-3期

关键词：

catalysis; iodide oxidation; chlorate; Mo-V; triodide;

D O I：

10.1016/S1381-1169(97)00060-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The kinetics of the catalytic effect of Mo2O4(H2O)(6)(2+) on the iodide oxidation by chlorate was studied at different temperatures (25-45 degrees C) in Ar-saturated acid aqueous solutions under conditions of excess iodide ion by monitoring the formation of I-3(-) at 352 nm. The initial reaction rate at 30 degrees C is represented by the following equation: v = 1/3 d[I-3(-)]/dt = k(Mo)[H+](2)[I-][ClO3-] with k(Mo) = 9 x 10(-5) s(-1).M-3 + 0.73 s(-1).M-3 [H+](-1)[Mo2O42+] where the brackets indicate molar concentrations and time is expressed in seconds. A mechanism, which includes the formation of a dimeric molybdenum complex as rate determining step, is proposed to account for the experimental results.

引用

页码：85 / 90

页数：6

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