Abstract
The electrochemical reduction of 1 atm hydrogen sulfide gas (H2S) has been studied at a platinum microelectrode (10 µm diameter) in five room temperature ionic liquids (RTILs): [C2mim][NTf2], [C4mpyrr][NTf2], [C4mim][OTf], [C4mim][NO3], and [C4mim][PF6] (where [Cnmim]+ = 1-alkyl-3-methylimidazolium, [NTf2]− = bis(trifluoromethylsulfonyl)imide, [C4mpyrr]+ = N-butyl- N-methylpyrrolidinium, [OTf]− = trifluoromethlysulfonate, [NO3]− = nitrate, and [PF6]− = hexafluorophosphate). In all five RTILs, a chemically irreversible reduction peak was observed on the reductive sweep, followed by one or two oxidative peaks on the reverse scan. The oxidation peaks were assigned to the oxidation of SH− and adsorbed hydrogen. In addition, a small reductive peak was observed prior to the large wave in [C2mim][NTf2] only, which may be due to the reduction of a sulfur impurity in the gas. Potential-step chronoamperometry was carried out on the reduction peak of H2S, revealing diffusion coefficients of 3.2, 4.6, 2.4, 2.7, and 3...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
