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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-496 |
| Subject |
Revealing indirect electro-reduction of quaternary ammonium polybromide droplets in acidic aqueous solutions |
| Authors |
Jiseon Hwang, Jinho Chang*
Department of Chemistry, Hanyang University, Korea
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| Abstract |
In previous work, we electrochemically analyzed stochastic current spikes from Br−-electrolysis in QBr2n+1 droplets by their particle impact on Pt UME. For electro-reduction of QBr2n+1 droplets through chronoamperometry, we found no evidence of stochastic current spikes, which are supposed to be evidence for direct electro-reduction (DR) of QBr2n+1 droplets to Br− and Q+ through their particle impact on Pt UME. Instead, we suggest an indirect electro-reduction (IDR) mechanism for QBr3 droplets. QBr3 equilibrated with Q+ and Br3− and the liberated Br3− from QBr3 droplets are electrochemically reduced to Br− until all the QBr3 droplets in the vicinity of the Pt UME are depleted. We further found that QBr2n+1 species (n = 2 and 3) are not electro-reduced through IDR but are precipitated on Pt UME. The frequency of the current spikes in the CAforward-50 cycles significantly declined as the potential-cycles increased. The chronoamperometric analyses indicated that the Pt surface is partially blocked by the reduction-inactive QBr2n+1 species, which was confirmed to be mostly QBr5 and QBr7 by Raman spectroscopy. |
| E-mail |
jisunning05@hanmail.net |
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122nd General Meeting of the KCS