Liquid | liquid biphasic electrochemistry in ultra-turrax dispersed acetonitrile | aqueous electrolyte systems
Liquid | liquid biphasic electrochemistry in ultra-turrax dispersed acetonitrile | aqueous electrolyte systems
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DOI：
10.1016/j.electacta.2010.07.104
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发表时间：
2010-12-01
影响因子：
6.6
通讯作者：
Marken, Frank
中科院分区：
文献类型：
--
作者：
Watkins, John D.;Amemiya, Fumihiro;Marken, Frank
研究了通过 Ultra-turrax 搅拌原位生成的不稳定乙腈垂直棒水乳液在双相电化学中的应用。在有机相中不有意添加电解质的情况下，演示了液体垂直棒液体水-有机电化学过程的三种操作模式，基于（i）在有机相存在的情况下在水相中形成水溶性产物（ii）在液体 I 液体电极三相边界处形成产物和离子转移以及（iii）形成水相中的水不溶性产物，然后转移到有机相中 使用带有 Ultra-turrax 搅拌器的三电极电解池，并表征乙腈 I 水溶液 2 M NaCl 两相电解质 使用三个氧化还原系统来量化电解池性能 使用水相中 Ru(NH3)(6)(3+) 的单电子还原来确定向电极表面的质量传输速率以及存在的影响乙腈相 利用乙腈中正丁基二茂铁的一电子氧化来研究三相边界过程 最后利用水相中钴烯正离子的一电子还原来演示产物从电极表面转移到有机相 讨论了双相电合成中的潜在应用 (C) 2010 Elsevier Ltd 版权所有
Unstable acetonitrile vertical bar aqueous emulsions generated in situ with ultra-turrax agitation are investigated for applications in dual-phase electrochemistry Three modes of operation for liquid vertical bar liquid aqueous-organic electrochemical processes are demonstrated with no intentionally added electrolyte in the organic phase based on (i) the formation of a water-soluble product in the aqueous phase in the presence of the organic phase (ii) the formation of a product and ion transfer at the liquid I liquid-electrode triple phase boundary and (iii) the formation of a water-insoluble product in the aqueous phase which then transfers into the organic phaseA three-electrode electrolysis cell with ultra-turrax agitator is employed and characterised for acetonitrile I aqueous 2 M NaCl two phase electrolyte Three redox systems are employed in order to quantify the electrolysis cell performance The one-electron reduction of Ru(NH3)(6)(3+) in the aqueous phase is employed to determine the rate of mass transport towards the electrode surface and the effect of the presence of the acetonitrile phase The one-electron oxidation of n-butylferrocene in acetonitrile is employed to study triple phase boundary processes Finally the one-electron reduction of cobalticenium canons in the aqueous phase is employed to demonstrate the product transfer from the electrode surface into the organic phase Potential applications in biphasic electrosynthesis are discussed (C) 2010 Elsevier Ltd All rights reserved