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| Hauptseite > Publikationsdatenbank > Oxygen reduction reaction kinetics on Pt in mixtures of proton conducting ionic liquids (PILs) and water: The influence of cation acidity > print |
| Hauptseite > Publikationsdatenbank > Oxygen reduction reaction kinetics on Pt in mixtures of proton conducting ionic liquids (PILs) and water: The influence of cation acidity > print |
| 001 | 889820 | ||
| 005 | 20240712113242.0 | ||
| 024 | 7 | _ | |a 10.1021/acs.jpcc.0c11374 |2 doi |
| 024 | 7 | _ | |a 1932-7447 |2 ISSN |
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| 100 | 1 | _ | |a Wippermann, Klaus |0 P:(DE-Juel1)129946 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a Oxygen reduction reaction kinetics on Pt in mixtures of proton conducting ionic liquids (PILs) and water: The influence of cation acidity |
| 260 | _ | _ | |a Washington, DC |c 2021 |b Soc. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a The aim of this study is to investigate the effect of the acidity of proton-conducting ionic liquids (PILs) on the oxygen reduction reaction (ORR) kinetics at polycrystalline platinum electrodes. Three PILs ([2-SEMA][TfO], [1-EIm][TfO], and [DEMA][TfO]) with different cation acidities (aqueous pKa = 0.94, 7.30 and 10.55) are investigated. The ORR kinetics are evaluated by simulating cyclic voltammograms recorded under an oxygen atmosphere. An associative mechanism, including H3O+ as the dominant proton donor, is used for the simulations. The dependencies of the rate constants k1 and the charge transfer coefficients α1 of the r.d.s. (O2 + e– → O2–) on the cation acidity, the water content (≈3–50 mol %), and the temperature (30–90 °C) are analyzed. The rate constant k1, the pre-exponential factor of k1, and the current density are observed to increase with the acidity of the PIL cation, whereas α1 shows the opposite behavior. At low water concentrations, the [2-SEMA+] cation is a remarkably good proton donor in ORR, contrary to the former results obtained from the HUPD reaction. This leads to a minimum of ≈30 mol % in the plots of the current density and k1 vs the water content, which correlates with a similar dependency of the pseudo capacitance C2. |
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| 700 | 1 | _ | |a Korte, Carsten |0 P:(DE-Juel1)140525 |b 2 |u fzj |
| 773 | _ | _ | |a 10.1021/acs.jpcc.0c11374 |g Vol. 125, no. 8, p. 4423 - 4435 |0 PERI:(DE-600)2256522-X |n 8 |p 4423 - 4435 |t The journal of physical chemistry |v 125 |y 2021 |x 1932-7447 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/889820/files/acs.jpcc.0c11374-1.pdf |y Restricted |
| 856 | 4 | _ | |y Published on 2021-02-18. Available in OpenAccess from 2022-02-18. |u https://juser.fz-juelich.de/record/889820/files/Influence%20of%20PIL%20Acidity%20Supporting%20Information%20Revised.pdf |
| 856 | 4 | _ | |y Published on 2021-02-18. Available in OpenAccess from 2022-02-18. |u https://juser.fz-juelich.de/record/889820/files/Influence%20of%20PIL%20acidity%20on%20the%20ORR%20kinetics%20Revised%20Manuscript.pdf |
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