Organic-Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S2W18O62]4-, and Polypyrrole for Iodate Electrocatalysis

Amna Yaqub; Mikhail Vagin; James J. Walsh; Fathima Laffir; Indherjith Sakthinathan; Timothy McCormac; Mustansara Yaqub

doi:10.1021/acsomega.2c01287

Organic-Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S₂W₁₈O₆₂]^4-, and Polypyrrole for Iodate Electrocatalysis

Amna Yaqub, Mikhail Vagin, James J. Walsh, Fathima Laffir, Indherjith Sakthinathan, Timothy McCormac, Mustansara Yaqub

Research output: Contribution to journal › Article › peer-review

Abstract

The Dawson-type sulfate polyoxometalate (POM) [S₂W₁₈O₆₂]^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^-9mol·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

Original language	English
Pages (from-to)	43381-43389
Number of pages	9
Journal	ACS Omega
Volume	7
Issue number	48
DOIs	https://doi.org/10.1021/acsomega.2c01287
Publication status	Published - 6 Dec 2022

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title = "Organic-Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S2W18O62]4-, and Polypyrrole for Iodate Electrocatalysis",

abstract = "The Dawson-type sulfate polyoxometalate (POM) [S2W18O62]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 × 10-9mol·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",

author = "Amna Yaqub and Mikhail Vagin and Walsh, {James J.} and Fathima Laffir and Indherjith Sakthinathan and Timothy McCormac and Mustansara Yaqub",

year = "2022",

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day = "6",

doi = "10.1021/acsomega.2c01287",

language = "English",

volume = "7",

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journal = "ACS Omega",

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T1 - Organic-Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S2W18O62]4-, and Polypyrrole for Iodate Electrocatalysis

AU - Yaqub, Amna

AU - Vagin, Mikhail

AU - Walsh, James J.

AU - Laffir, Fathima

AU - Sakthinathan, Indherjith

AU - McCormac, Timothy

AU - Yaqub, Mustansara

PY - 2022/12/6

Y1 - 2022/12/6

N2 - The Dawson-type sulfate polyoxometalate (POM) [S2W18O62]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 × 10-9mol·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

AB - The Dawson-type sulfate polyoxometalate (POM) [S2W18O62]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 × 10-9mol·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

UR - http://www.scopus.com/inward/record.url?scp=85142624667&partnerID=8YFLogxK

U2 - 10.1021/acsomega.2c01287

DO - 10.1021/acsomega.2c01287

M3 - Article

AN - SCOPUS:85142624667

SN - 2470-1343

VL - 7

SP - 43381

EP - 43389

JO - ACS Omega

JF - ACS Omega

IS - 48

ER -

Organic-Inorganic Hybrid Films of the Sulfate Dawson Polyoxometalate, [S₂W₁₈O₆₂]^4-, and Polypyrrole for Iodate Electrocatalysis

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