Catalytic reduction of Pu(IV) with formic acid in nitric acid solutions

被引：1

作者：

Anan'ev A.V. ^{[1
]}

Shilov V.P. ^{[1
]}

机构：

[1] Institute of Physical Chemistry, Russian Academy of Sciences, Moscow, Russia

来源：

Radiochemistry | 2004年 / 46卷 / 3期

关键词：

Physical Chemistry; Urea; Inorganic Chemistry; Formic Acid; Nitric Acid;

D O I：

10.1023/B:RACH.0000031679.19590.ae

中图分类号：

学科分类号：

摘要：

Pu(IV) is reduced to Pu(III) in nitric acid solutions with formic acid in the presence of urea and 1% Pt/SiO 2 catalyst. The kinetics of reduction were studied in 0.3-2.3 M HNO 3 containing 0.2-1 M HCOOH, 0.1-0.5 M (NH 2) 2CO, and 0.01-0.1 g ml -1 of 1% Pt/SiO 2 at 30-60°C. At HNO 3 concentration higher than 2 M, the Pu(IV) reduction is reversible because of catalytic decomposition of urea. The reduction mechanism is discussed.

引用

页码：242 / 245

页数：3

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