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
收藏
页码：85 / 90
页数：6
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