Electrochemistry of Sulfur and Polysulfides in Ionic Liquids
Data(s) |
01/12/2011
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Resumo |
The electrochemistry of elemental sulfur (S-8) and the polysulfides Na2S4 and Na2S6 has been studied for the first time in nonchloroaluminate ionic liquids. The cyclic voltammetry of S-8 in the ionic liquids is different to the behavior reported in some organic solvents, with two reductions and one oxidation peak observed. Supported by in situ UV-vis spectro-electrochemical experiments, the main reduction products of S-8 in [C(4)mim][DCA] ([C(4)mim] = 1-butyl-3-methylimidazolium; DCA = dicyanamide) have been identified as s(6)(2-) and S-4(2-), and plausible pathways for the formation of these species are proposed. Dissociation and/or disproportionation of the polyanions S-6(2-) and S-4(2-) appears to be slow in the ionic liquid, with only small amounts of the blue radical species S3(center dot-) formed in the solutions at r.t., in contrast with that observed in most molecular solvents. |
Identificador | |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Manan , N S A , Aldous , L , Alias , Y , Murray , P , Yellowlees , L J , Lagunas , M C & Hardacre , C 2011 , ' Electrochemistry of Sulfur and Polysulfides in Ionic Liquids ' Journal of Physical Chemistry B , vol 115 , no. 47 , pp. 13873-13879 . DOI: 10.1021/jp208159v |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/1600/1606 #Physical and Theoretical Chemistry #/dk/atira/pure/subjectarea/asjc/2500/2505 #Materials Chemistry #/dk/atira/pure/subjectarea/asjc/2500/2508 #Surfaces, Coatings and Films |
Tipo |
article |