Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Gonçalves, A. Ricardo; Ghica, Mariana Emilia; Brett, Christopher M.A.

doi:10.1016/j.electacta.2010.11.056

Cited by 44 publications

(21 citation statements)

References 38 publications

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“…3) on EP-PEDOT is particularly surprising given that it has been previously shown to effectively reduce hydrogen peroxide. 14 4-point conductivity measurements on VPP-PEDOT yielded 550 S cm −1 , typical of VPP-PEDOT produced in this manner. 8 The residual content of iron(III) from films produced by vapor-phase polymerisation has been reported previously as being undetectable using X-Ray photoelectron spectroscopy, 1,15 and to have no effect on the electrocatalytic behavior of the films.…”

Section: Resultsmentioning

confidence: 99%

Influence of the Polymerization Method on the Oxygen Reduction Reaction Pathway on PEDOT

Kerr

Pozo‐Gonzalo

Forsyth

et al. 2013

ECS Electrochemistry Letters

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The influence of the polymerization method of poly(3,4-ethylenedioxythiophene) (PEDOT), namely vapor-phase polymerization (VPP-PEDOT) or electrodeposition (EP-PEDOT), on the electrocatalytic properties is herein reported. Rotating disk electrode and rotating ring-disk electrode studies in alkaline conditions have shown that as the electrode potential is scanned in the negative direction the oxygen reduction reaction (ORR) on VPP-PEDOT undergoes a transition from a 2-electron pathway to a 4-electron pathway at −0.45 V (vs Ag/AgCl). In contrast, the ORR proceeds only by the 2-electron pathway on EP-PEDOT.Poly(3,4-ethylenedioxythiopene) (PEDOT) has emerged as an alternative cathode catalyst material to platinum since the discovery by Winther-Jensen et al. of its ability to effectively catalyze the oxygen reduction reaction (ORR). 1 Here it was shown that PEDOT catalyzes the ORR most effectively under alkaline conditions, making it particularly attractive for alkaline fuel cells (AFCs) and metal-air batteries. It was suggested that the ORR followed a 4-electron pathway, however, a report was recently published in 2012 stating that the ORR proceeds via the 2-electron process on electrodeposited PEDOT. 2 The ORR is able to proceed via two overall pathways; the 'direct' and the 'series' pathways. The direct pathway sees the complete reduction of oxygen via a 4-electron step to form hydroxides in basic media (Eq. 1)The 'series' pathway in basic media involves two successive 2-electron processes, which proceed via a hydrogen peroxide anion intermediate to give hydroxides (Eqs. 2 and 3).Both the choice of counter-ion present during electrodeposition 3,4 and the electrodeposition potential 5,6 have been shown to play an important role in regards to the structure and properties of electrodeposited films. However, there are no reported works to date that have investigated the influence of the polymerization technique on the pathway of electrocatalytic reactions on conducting polymer electrodes. ExperimentalAll voltammetric experiments were performed using a Biologic VMP3/Z multi-channel potentiostat and a RRDE-3A rotating ringdisk electrode (RRDE) apparatus (ALS Co., Ltd, Japan). The RRDE and RDE measurements were taken with an electrode composed of a Pt ring (0.188 cm 2 area) electrode and a glassy carbon (GC) disk electrode (4 mm diameter, 0.126 cm 2 area). A Pt wire counter electrode and Ag/AgCl (NaCl(aq), 3 mol dm −3 ) (both from ALS Co., Ltd, Japan) reference electrode were used throughout. All potentials are stated in reference to Ag/AgCl. Deionized water (Millipore SuperQ system, resistivity 18.2 M cm) was used to prepare all electrolyte solutions. All voltammetric experiments were performed at 20 ± 1 • C.The solution for PEDOT electrodeposition was prepared by dissolving 3,4-ethylenedioxythiophene (EDOT, Yacoo) to a concentration of 5 × 10 −2 mol dm −3 in a water-ethanol (60:40) solution containing sodium para-toluenesulfonate (NaPTS, 0.1 mol dm −3 , Aldrich) as * Electrochemical Society Active Member. z E-mail: Rober...

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Section: Resultsmentioning

confidence: 99%

Influence of the Polymerization Method on the Oxygen Reduction Reaction Pathway on PEDOT

Kerr

Pozo‐Gonzalo

Forsyth

et al. 2013

ECS Electrochemistry Letters

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“…Meanwhile, Poly-Neutral Red (PNR) has been synthesized and characterized electrochemically as redox polymer to provide electron transfer in biosensor [6,[43][44][45]. The formation of PNR has been carried out from electropolymerization procedure by allowing the monomer to be oxidizing for 20-30 cycles of polymerization on the electrode material.…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Seawater Desalination Using Microbial Desalination Cell Based on Bio-Catalytic Devices Modification.

Mardiana¹,

Innocent²,

Cretin³

et al. 2020

Preprint

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Microbial desalination cell (MDC) built on bio-catalytic devices modification has been studied for sea water desalination using Saccharomyces cerevisiae as biocatalyst. Here we focussed the modification of anode and this study has been confirmed that bio-catalytic devices maintenance could contribute to the long-term MDC perform during desalination process. The goal of this study is to provide and develop a sea water desalination system without requiring an energy support by applying modification of anode as electron acceptor, and the different potential charges that occur between anode and cathode can plays as driving force for electro dialysis of sea water desalination. Several types of bio-catalytic devices modification have been conducted, i.e. by immobilization of mediator, immobilization of biocatalyst or a combination of both. The optimization of each device has been characterized by cyclic voltammetry, Chronoamperometry, and applied in Microbial fuel cell prior observed in MDC. The concentrations of ion salt migration have been determined by Ion Exchange Chromatography. The profiles of surface device have been detected by Scanning electron microscope and Energy Dispersive X-ray spectroscopy. Results shows that the modification of anode could be a promising method for bioelectricity generation delivered from MDC which as simultaneously produce an electricity and sea water desalination and provide a green chemistry technology.

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“…Electronically Conducting Polymers (ECPs) are materials of increasing interest for application in fields such as supercapacitors, electrochromic devices, biosensors, electrocatalysts [1][2][3][4][5][6][7][8][9][10]. ECPs have been widely studied when deposited on usual electrode materials with metallic behaviours (platinum, gold, glassy carbon….)…”

Section: Introductionmentioning

confidence: 99%

Electrochemical impedance spectroscopy characterization of conducting polymer/TiO2 nanotube array hybrid structures

Ngaboyamahina¹,

Cachet²,

Pailleret³

et al. 2015

Journal of Electroanalytical Chemistry

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The model suggested by Deslouis, Tribollet and co-workers in 1996 for describing the behaviour of polypyrrole deposited on a metallic substrate is here used for conducting polymers deposited on a nanostructured 3D semiconducting substrate. Impedance measurements were performed on a titanium oxide nanotubular array in the presence of two types of conducting polymers: polypyrrole and poly(3,4-ethylenedioxythiophene), highlighting the modification of the semiconducting properties of the substrate induced by the polymer deposition. The model is shown to be particularly well adapted for the PEDOT/ TiO 2 hybrid structure, providing a valuable tool for characterizing the interaction between the conducting polymer and the semiconducting substrate.

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Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Cited by 44 publications

References 38 publications

Influence of the Polymerization Method on the Oxygen Reduction Reaction Pathway on PEDOT

Influence of the Polymerization Method on the Oxygen Reduction Reaction Pathway on PEDOT

WITHDRAWN: Seawater Desalination Using Microbial Desalination Cell Based on Bio-Catalytic Devices Modification.

Electrochemical impedance spectroscopy characterization of conducting polymer/TiO2 nanotube array hybrid structures

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