Electrochemistry and Spectroelectrochemistry of the Pu (III/IV) and (IV/VI) Couples in Nitric Acid Systems
Electrochemistry and Spectroelectrochemistry of the Pu (III/IV) and (IV/VI) Couples in Nitric Acid Systems
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硝酸体系中 Pu (III/IV) 和 (IV/VI) 电对的电化学和光谱电化学
DOI：
10.1002/elan.201700465
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发表时间：
2017
期刊：
影响因子：
3
通讯作者：
Sam Bryan
中科院分区：
文献类型：
--
作者：
A. Lines;S. Adami;A. Casella;S. Sinkov;G. Lumetta;Sam Bryan
用电化学和光谱电化学方法研究了钚在硝酸中的溶液化学。通过利用和比较这些技术，可以更好地了解钚的行为及其对硝酸浓度的依赖性。在这里，钚（III/IV）对的特征在于使用循环伏安法，方波伏安法，和光谱电化学能斯特步骤。结果表明，正式的还原电位的夫妇转移负增加酸浓度和可逆的电化学不再是可达到以上6 M硝酸。 光谱电化学也被用来探索Pu（IV）到Pu（VI）的不可逆氧化反应，并阐明氧化还原反应的机制和酸依赖性。
The solution chemistry of Pu in nitric acid is explored via electrochemistry and spectroelectrochemistry. By utilizing and comparing these techniques, an improved understanding of Pu behavior and its dependence on nitric acid concentration can be achieved. Here the Pu (III/IV) couple is characterized using cyclic voltammetry, square wave voltammetry, and a spectroelectrochemical Nernst step. Results indicate the formal reduction potential of the couple shifts negative with increasing acid concentration and reversible electrochemistry is no longer attainable above 6 M HNO3. Spectroelectrochemistry is also used to explore the irreversible oxidation of Pu(IV) to Pu(VI) and shine light on the mechanism and acid dependence of the redox reaction.