Organic–Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S(2)W(18)O(62)](4–), and Polypyrrole for Iodate Electrocatalysis

[Image: see text] The Dawson-type sulfate polyoxometalate (POM) [S(2)W(18)O(62)](4–) has successfully been entrapped in polypyrrole (PPy) films on glassy carbon electrode (GCE) surfaces through pyrrole electropolymerization. Films of varying POM loadings (i.e., thickness) were grown by chronocoulome...

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Autores principales: Yaqub, Amna, Vagin, Mikhail, Walsh, James J., Laffir, Fathima, Sakthinathan, Indherjith, McCormac, Timothy, Yaqub, Mustansara
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9730513/
https://www.ncbi.nlm.nih.gov/pubmed/36506212
http://dx.doi.org/10.1021/acsomega.2c01287
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author Yaqub, Amna
Vagin, Mikhail
Walsh, James J.
Laffir, Fathima
Sakthinathan, Indherjith
McCormac, Timothy
Yaqub, Mustansara
author_facet Yaqub, Amna
Vagin, Mikhail
Walsh, James J.
Laffir, Fathima
Sakthinathan, Indherjith
McCormac, Timothy
Yaqub, Mustansara
author_sort Yaqub, Amna
collection PubMed
description [Image: see text] The Dawson-type sulfate polyoxometalate (POM) [S(2)W(18)O(62)](4–) has successfully been entrapped in polypyrrole (PPy) films on glassy carbon electrode (GCE) surfaces through pyrrole electropolymerization. Films of varying POM loadings (i.e., thickness) were grown by chronocoulometry. Film-coated electrodes were then characterized using voltammetry, revealing POM surface coverages ranging from 1.9 to 11.7 × 10(–9) mol·cm(–2), and were stable over 100 redox cycles. Typical film morphology and composition were revealed to be porous using atomic force microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy, and the effects of this porosity on POM redox activity were probed using AC impedance. The hybrid organic–inorganic films exhibited a good electrocatalytic response toward the reduction of iodate with a sensitivity of 0.769 μA·cm(–2)·μM(–1).
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spelling pubmed-97305132022-12-09 Organic–Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S(2)W(18)O(62)](4–), and Polypyrrole for Iodate Electrocatalysis Yaqub, Amna Vagin, Mikhail Walsh, James J. Laffir, Fathima Sakthinathan, Indherjith McCormac, Timothy Yaqub, Mustansara ACS Omega [Image: see text] The Dawson-type sulfate polyoxometalate (POM) [S(2)W(18)O(62)](4–) has successfully been entrapped in polypyrrole (PPy) films on glassy carbon electrode (GCE) surfaces through pyrrole electropolymerization. Films of varying POM loadings (i.e., thickness) were grown by chronocoulometry. Film-coated electrodes were then characterized using voltammetry, revealing POM surface coverages ranging from 1.9 to 11.7 × 10(–9) mol·cm(–2), and were stable over 100 redox cycles. Typical film morphology and composition were revealed to be porous using atomic force microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy, and the effects of this porosity on POM redox activity were probed using AC impedance. The hybrid organic–inorganic films exhibited a good electrocatalytic response toward the reduction of iodate with a sensitivity of 0.769 μA·cm(–2)·μM(–1). American Chemical Society 2022-11-17 /pmc/articles/PMC9730513/ /pubmed/36506212 http://dx.doi.org/10.1021/acsomega.2c01287 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Yaqub, Amna
Vagin, Mikhail
Walsh, James J.
Laffir, Fathima
Sakthinathan, Indherjith
McCormac, Timothy
Yaqub, Mustansara
Organic–Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S(2)W(18)O(62)](4–), and Polypyrrole for Iodate Electrocatalysis
title Organic–Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S(2)W(18)O(62)](4–), and Polypyrrole for Iodate Electrocatalysis
title_full Organic–Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S(2)W(18)O(62)](4–), and Polypyrrole for Iodate Electrocatalysis
title_fullStr Organic–Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S(2)W(18)O(62)](4–), and Polypyrrole for Iodate Electrocatalysis
title_full_unstemmed Organic–Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S(2)W(18)O(62)](4–), and Polypyrrole for Iodate Electrocatalysis
title_short Organic–Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S(2)W(18)O(62)](4–), and Polypyrrole for Iodate Electrocatalysis
title_sort organic–inorganic hybrid films of the sulfate dawson polyoxometalate, [s(2)w(18)o(62)](4–), and polypyrrole for iodate electrocatalysis
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9730513/
https://www.ncbi.nlm.nih.gov/pubmed/36506212
http://dx.doi.org/10.1021/acsomega.2c01287
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