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Electrochemical investigation of the stable chromium species in molten FLINAK

机译:熔融FLINAK中稳定铬物种的电化学研究

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The electrochemical behavior of Cr(III) in FLINAK melts at 600 degrees C was studied through cyclic voltammetry (CV) and square wave voltammetry (SWV). Cr(III) reduction proceeded in two steps: initial Cr(III) reduction to Cr(II) followed by subsequent reduction to Cr. The peak corresponding to the reduction of Cr(III) to Cr(II) was also observed in SWVs and CVs even though only CrF2 was added to the FLINAK melts. This result confirms that Cr(II) was converted to Cr(III) via disproportion: 3Cr(II) = 2Cr(III) + Cr. Such a conversion could be attributed to the formation of the stable species [CrF6](3-), as determined through Raman spectroscopy.
机译:通过循环伏安法(CV)和方波伏安法(SWV)研究了FLINAK熔体中Cr(III)在600摄氏度下的电化学行为。 Cr(III)的还原过程分为两个步骤:首先将Cr(III)还原为Cr(II),然后再还原为Cr。即使在FLINAK熔体中仅添加了CrF2,在SWV和CV中也观察到了对应于Cr(III)还原为Cr(II)的峰。该结果证实了Cr(II)通过不等比例转化为Cr(III):3Cr(II)= 2Cr(III)+ Cr。如通过拉曼光谱法所确定的,这种转化可归因于稳定物种[CrF6](3-)的形成。

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