AUTOXIDATION OF URANIUM(V) - CATALYSIS AND INHIBITION BY COPPER IONS

被引：55

作者：

BAKAC, A ^{[1
]}

ESPENSON, JH ^{[1
]}

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011

来源：

INORGANIC CHEMISTRY | 1995年 / 34卷 / 07期

关键词：

D O I：

10.1021/ic00111a020

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The autoxidation of UO2+ in acidic aqueous solutions yields UO22+ and H2O2 as products. The initial step occurs with a rate constant k(U) = 31.4 M(-1) s(-1). The reaction is catalyzed by aquacopper(II) ions, owing to the reaction between Cu2+ and UO2+ (k = 915 M(-1) s(-1)) yielding Cu+, which is rapidly reoxidized by O-2. Cu2+ also reacts with an intermediate produced in the direct reaction of UO2+ and O-2, and the combined effects of Cu2+ aS catalyst and scavenger lead to an unusual dependence of the observed rate constant on [Cu2+]. The role of superoxouranium(VI) and HO2. as reaction intermediates is discussed.

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页码：1730 / 1735

页数：6

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