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| Home > Publications database > Probing the Electrolyte Transfer in Ultrathin Polypyrrole Films by In Situ X-ray Reflectivity and Electrochemistry > print |
| 001 | 452117 | ||
| 005 | 20250716152209.0 | ||
| 024 | 7 | _ | |a 10.1021/acs.langmuir.0c02068 |2 doi |
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| 100 | 1 | _ | |a Lakner, Pirmin |0 P:(DE-H253)PIP1032094 |b 0 |
| 245 | _ | _ | |a Probing the Electrolyte Transfer in Ultrathin Polypyrrole Films by In Situ X-ray Reflectivity and Electrochemistry |
| 260 | _ | _ | |a Washington, DC |c 2020 |b ACS Publ. |
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| 520 | _ | _ | |a This study reports on the potential-induced chargeand mass transfer between an ultrathin polypyrrole (PPy)film andan electrolyte by simultaneous in situ X-ray reflectivity (XRR) andelectrochemistry (EC) utilizing their sensitivity to electrons. Anabout 30 nm thin PPyfilm was deposited on a silicon single crystalby fast potential cycling, providing a densefilm of an extraordinarysmall surface roughness. XRR was recorded from the PPyfilm inan aqueous 0.1 M perchloric acid at electric potentials between−0.2 V and +0.5 V vs Ag/AgCl. The PPyfilm shows typicalreversible and linear changes infilm thickness and electron densityarising from the potential-dependent electrolyte incorporation. Byintroducing EC-XRR, a comprehensive analysis combining in situ XRR and EC, the net number of electrons passing through thePPy-electrolyte interface was deduced along with the potential-induced thickness variations, indicating a complex exchangemechanism. Evidently, along with the anion transfer, parallel charge compensation by protons and a volume and electroncompensating counterflow of solvent molecules take place. Complementary time-dependent EC-XRR scans indicate that theseexchange mechanisms are individual in two potential ranges. The low actuation along with a high pseudocapacitance suggest the fastpotentiodynamically deposited PPyfilm as a promising supercapacitor material. |
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| 536 | _ | _ | |a SFB 986 B07 - Polymere in grenzflächenbestimmten Geometrien: Struktur, Dynamik und Funktion an planaren und in porösen Hybridsystemen (B07) (318019437) |0 G:(GEPRIS)318019437 |c 318019437 |x 2 |
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| 700 | 1 | _ | |a Brinker, Manuel |0 P:(DE-HGF)0 |b 1 |
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| 700 | 1 | _ | |a Jacobse, Leon |0 P:(DE-H253)PIP1085323 |b 3 |
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| 700 | 1 | _ | |a Keller, Thomas F. |0 P:(DE-H253)PIP1019138 |b 8 |e Corresponding author |
| 773 | _ | _ | |a 10.1021/acs.langmuir.0c02068 |g Vol. 36, no. 45, p. 13448 - 13456 |0 PERI:(DE-600)2005937-1 |n 45 |p 13448 - 13456 |t Langmuir |v 36 |y 2020 |x 1520-5827 |
| 856 | 4 | _ | |u https://pubs.acs.org/doi/pdf/10.1021/acs.langmuir.0c02068 |
| 856 | 4 | _ | |u https://bib-pubdb1.desy.de/record/452117/files/acs.langmuir.0c02068.pdf |y OpenAccess |
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