Electrochemical behavior and electrocatalytic activity of anthraquinonedisulphonate in solution phase and as doping species at polypyrrole modified glassy carbon electrode

Zhang, Guoquan; Yang, Wu; Yang, Fenglin

doi:10.1016/j.jelechem.2006.12.007

Cited by 41 publications

(21 citation statements)

References 33 publications

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“…We have undertaken a study of the application of polypyrrole/anthraquinone dislufonate (PPY/AQDS) composite film as the electrocatalyst for ORR. This study shows that the PPY/AQDS film has excellent electrocatalytic activity [17,18]. Furthermore, we have proved that this film can improve electro-Fenton oxidation efficiency when it is used as cathode materials in electro-Fenton system [4,8].…”

Section: Introductionmentioning

confidence: 58%

“…Thus, a high O 2 reduction current is obtained on this PANI/AQDS composite film. It must be noticed that this O 2 reduction current is about ten times higher than that on the PPY/AQDS composite film [17].…”

Section: Possible Mechanism For Orr On the Gc/pani/ Aqds Electrodementioning

confidence: 77%

“…When the PANI/AQDS composite film is used for ORR, besides the similar diode characteristic, other comparisons with the previous researches on the PPY/AQDS composite film [17,18] are summarized in Table 1. (i) When dissolved AQDS is doped in PANI, the decrease for the difference of the anodic peak potential and the cathodic potential (DE) is greater than in the PPY.…”

Section: Possible Mechanism For Orr On the Gc/pani/ Aqds Electrodementioning

confidence: 97%

“…Thus, this high exchange current is estimated to be the result of the presence of AQDS in PANI. Base on previous reports on quinonoid compound modified electrodes [17,18], it is assumed that oxygen reduction performs a two-electron reduction reaction on the PANI/AQDS modified electrode. A qualitative reaction on hydrogen peroxide is performed using 0.5 M KI solution as the indicator [29].…”

Section: à2mentioning

confidence: 99%

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Anthraquinonedisulfonate Doped Polyaniline as an Acceptor‐Donor System for Electrocatalysis of Oxygen Reduction

et al. 2009

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A stable polyaniline (PANI) film doped with anthraquinonedisulfonate (AQDS) on glassy carbon (GC) electrode is obtained in acidic solution. The electrochemical behavior of PANI/AQDS film coincides with the donor -acceptor (DA) intramolecular interaction, while the doped AQDS behaves as a two-electron two-proton transfer process during redox reaction. This GC/PANI/AQDS electrode shows high electrocatalytic activity and irreversible electrontransfer characteristic for O 2 two-electron reduction. Tafel behavior analysis suggests that the oxygen reduction kinetics are different at certain potential regions on this electrode. Possible mechanism of oxygen reduction on the GC/PANI/AQDS electrode points to a similar Schottky diode characteristic.

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Section: Introductionmentioning

confidence: 58%

Section: Possible Mechanism For Orr On the Gc/pani/ Aqds Electrodementioning

confidence: 77%

Section: Possible Mechanism For Orr On the Gc/pani/ Aqds Electrodementioning

confidence: 97%

Section: à2mentioning

confidence: 99%

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Anthraquinonedisulfonate Doped Polyaniline as an Acceptor‐Donor System for Electrocatalysis of Oxygen Reduction

et al. 2009

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“…While on the PPy/GC electrode, the catalytic current approaches to zero. These results indicate that ORR catalyzed by the AQDS/PPy composite film is mainly mediated by the doping AQDS, while the PPy layers play only the role of charge transporter [13,18]. As the cathodic potential is stepped from À 0.9 to À 0.45 V, no significant anodic current is observed, implying the irreversible nature of the catalytic reduction of oxygen [14].…”

Section: Ca Techniquementioning

confidence: 85%

Electrocatalytic Reduction of Oxygen at Anthraquinonedisulfonate/Polypyrrole Composite Film Modified Electrodes and Its Application to the Electrochemical Oxidation of Azo Dye

et al. 2009

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We report here the electrocatalytic reduction of oxygen on thin anthraquindisulfonate (AQDS)/poplypyrrole (PPy) composite film modified electrodes and its application to the electrooxidation of azo dye-amaranth. The polymercoated cathode exhibited good electrocatalytic activity towards oxygen reduction reaction (ORR), and allowed the formation of strong oxidant hydroxyl radical (. OH) in the medium via Electro-Fentons reaction between cathodically generated H 2 O 2 and added or regenerated Fe 2þ. The electrochemical behaviors of ORR in various pH solutions were described using cyclic voltammetry (CV), rotating disk electrode (RDE) and chronoamperometric (CA) techniques. The effect of solution pH on amaranth mineralization by the Fe 2þ /H 2 O 2 and Fe 3þ /H 2 O 2 electrooxidation systems was studied. In addition, the long-term electrocatalytic activity and stability of the AQDS/PPy composite film during multiple experimental runs were also examined electrochemically.

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Mechanistic Study of Ethanol Dehydrogenation over Silica‐Supported Silver

2013

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A silica‐supported Ag catalyst has been shown to be an efficient heterogeneous catalyst for the oxidant‐free dehydrogenation of ethanol into acetaldehyde. The reaction mechanism has been investigated by in situ FTIR spectroscopy. The kinetic isotope effects for proton and hydride abstraction have been studied by using CH3CD2OH and CH3CH2OD as labeled reactants. The results indicate that OH bond activation and the formation of a hydrogen‐bonded complex take place on the silica support and that the Ag particles are necessary for the activation of the CH bond. The kinetic isotope effect (kH/kD) is 1.9 for CH3CD2OH and 1.8 for CH3CH2OD. The concerted mechanism of CH cleavage on the Ag sites and proton abstraction on the silica sites is proposed to account for the results of the spectroscopic and kinetic experiments.

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Electrochemical behavior and electrocatalytic activity of anthraquinonedisulphonate in solution phase and as doping species at polypyrrole modified glassy carbon electrode

Cited by 41 publications

References 33 publications

Anthraquinonedisulfonate Doped Polyaniline as an Acceptor‐Donor System for Electrocatalysis of Oxygen Reduction

Anthraquinonedisulfonate Doped Polyaniline as an Acceptor‐Donor System for Electrocatalysis of Oxygen Reduction

Electrocatalytic Reduction of Oxygen at Anthraquinonedisulfonate/Polypyrrole Composite Film Modified Electrodes and Its Application to the Electrochemical Oxidation of Azo Dye

Mechanistic Study of Ethanol Dehydrogenation over Silica‐Supported Silver

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