Investigating the Long-Term Stability and Kinetics of Superoxide Ion in Dimethyl Sulfoxide Containing Ionic Liquids and the Application of Thiophene Destruction

Abstract

-after the introduction of the IL was monitored using a UV-vis spectrophotometer. The ammoniumbased ILs were found to be more stable than piperidinium-based ILs. To the best of our knowledge, this was the first time that O2 − stability with ILs has been monitored continuously for up to 24 h. This should provide a better insight into the stability and kinetics of O2 − for industrial applications and its role in energy-storage devices. The most appropriate IL as a medium was [EDMPAmm][TFSI], and O2 − generated in this IL was used to destroy nearly 90% of thiophene.

In Situ Electrosynthesis of Peroxydicarbonate Anion in Ionic Liquid Media Using Carbon Dioxide/Superoxide System

“…In general, this implied that the reduction of O 2 commences in the bulk phase of the IL; as a result, there is no reduction of O 2 at the surface of the GC electrode. Also, this observation strongly suggested that the electrochemical process was kinetically rapid, and in the presence of reversed oxidation CV waves, the O 2 · – generated was stable in [EDMPAmm + ]­[TFSI – ], [MOEMMor + ]­[TFSI – ], and [PMIm + ]­[TFSI – ] . By comparing Figure a–c and Figure S1a–c, a contacting pattern of CO 2 and O 2 in the IL becomes immaterial; hence, the two figures show similar CV waves for O 2 reduction.…”

“…•− in our previous studies. 14,[18][19][20]38,41,57 In addition, ultrahigh pure N 2 (99.999%), CO 2 (99.999%), and O 2 (99.999%) were purchased from Gaslink SDN Malaysia.…”

“…Table presents the structure of the cations and anion comprising the ILs. The selection of these ILs was based on the best structures that provided stable generation of the O 2 ·– in our previous studies. ,− ,,, In addition, ultrahigh pure N 2 (99.999%), CO 2 (99.999%), and O 2 (99.999%) were purchased from Gaslink SDN Malaysia.…”