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Polyaniline Films a...
Polyaniline Films as Electrochemical-Proton Pump for Acidification of Thin Layer Samples
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- Wiorek, Alexander (författare)
- KTH,Tillämpad fysikalisk kemi
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- Cuartero, Maria, PhD, 1984- (författare)
- KTH,Tillämpad fysikalisk kemi
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- De Marco, Roland (författare)
- Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, 90 Sippy Downs Drive, Sippy Downs, Queensland 4556, Australia;School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia;Fuels and Energy Technology Institute, Curtin University, Perth, Western Australia 6102, Australia
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- Crespo, Gaston A., 1980- (författare)
- KTH,Tillämpad fysikalisk kemi
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(creator_code:org_t)
- 2019-11-06
- 2019
- Engelska.
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Ingår i: Analytical Chemistry. - : American Chemical Society (ACS). - 0003-2700 .- 1520-6882. ; 91:23, s. 14951-14959
- Relaterad länk:
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Here, we provide the first experimental evidence of proton release from polyaniline (PANI) films subjected to anodic potentials at environmental pHs. We conducted an extensive characterization of unpolarized/polarized PANI films—synthesized by traditional sequential voltammetric scanning—by using spectroelectrochemistry, synchrotron radiation-X-ray photoelectron spectroscopy, near edge X-ray absorption fine structure, and potentiometric pH sensing in the vicinity of the PANI layer. This new insight enables the utilization of PANI as a proton pump, which is actively tuned through an electrochemical pulse, so as to controllably acidify well-confined thin layer samples. Furthermore, we demonstrate the analytical significance of this system by measuring the alkalinity of artificial and natural water samples by using two faced planar PANI electrodes, one working as a proton source and the other one as pH electrode. Finally, the impact of this approach is 2-fold: (i) all-solid-state electrode materials may be used with devisible consequences in miniaturized and implementable submersible probes, and (ii) rapid determination of alkalinity as compared to traditional approaches together with a versatility in pH adjustment in any kind of sample, among other applications.
Ämnesord
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
Nyckelord
- Kemi
- Chemistry
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