Electrochemical investigation of the stable chromium species in molten FLINAK
Electrochemical investigation of the stable chromium species in molten FLINAK
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熔融 FLINAK 中稳定铬物质的电化学研究
DOI：
10.1039/c5ra09919f
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Xie, Leidong
中科院分区：
文献类型：
--
作者：
Peng, Hao;Shen, Miao;Xie, Leidong
采用循环伏安法（CV）和方波伏安法（SWV）研究了Cr（III）在FLINAK熔体中的电化学行为。Cr（III）的还原分两步进行：初始Cr（III）还原为Cr（II），随后还原为Cr。在SWV和CV中也观察到对应于Cr（III）还原为Cr（II）的峰，即使仅将CrF 2添加到FLINAK熔体中。该结果证实Cr（II）通过歧化转化为Cr（III）：3Cr（II）= 2Cr（III）+ Cr。通过拉曼光谱测定，这种转化可归因于稳定物种[CrF 6]（3-）的形成。
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.