Spontaneous modification of glassy carbon surface with anthraquinone from the solutions of its diazonium derivative: An oxygen reduction study

Seinberg, Jaanika-Maria; Kullapere, Marko; Mäeorg, Uno; Maschion, Fernando C.; Maia, Gilberto; Schiffrin, David J.; Tammeveski, Kaido

doi:10.1016/j.jelechem.2008.09.002

Cited by 73 publications

(52 citation statements)

References 91 publications

(142 reference statements)

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“…Anthraquinone functionality has been exploited in processes involving oxygen reduction to peroxides [21,22], reactions with thiols [23], as a redox mediator [24], and in sensing of pH [25,26]. Anthraquinones in solution provide a tunable redox system [27].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanoparticle Surface Electrochemistry: High‐Density Covalent Immobilisation and Pore‐Reactivity of 9,10‐Anthraquinone

et al. 2011

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2-Bromomethyl-9,10-anthraquinone is covalently bound to carbon nanoparticle surfaces (Emperor 2000, Cabot Corp., with sulphonamide groups, ca. 9 to 18 nm diameter) with a coverage of ca. 250 anthraquinone molecules per particle (ca. 180 2 per anthraquinone). The resulting hydrophobic carbon particles are dispersed in ethanol and coated onto glassy carbon electrodes. Electrochemical experiments are reported demonstrating the effect of surface coverage, scan rate, and pH. A linear shift in reversible potential of ca. 59 mV per pH unit from pH 2 to 12 is observed consistent with the reversible 2-electron 2-proton reduction of anthraquinone. High density of anthraquinone in carbon nanoparticle aggregates causes buffer capacity effects. Binding of hydrophobic tetraphenylborate anions into carbon nanoparticle aggregate pores is demonstrated. Applications in buffer characterisation and pH-sensing are discussed.

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Section: Introductionmentioning

confidence: 99%

Carbon Nanoparticle Surface Electrochemistry: High‐Density Covalent Immobilisation and Pore‐Reactivity of 9,10‐Anthraquinone

et al. 2011

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“…Two methods were used to graft AQ molecules on microporous on-chip CDC film. A spontaneous modification (chemical route) [49] was achieved by immersing the CDC electrode for 3.5 h in acetonitrile solution containing AQ-1-diazonium concentrated at 20 mM and 0.1 M NEt 4 BF 4 . The modified on-chip CDC film was then washed with aliquots of ethanol prior to electrochemical characterization.…”

Section: Chemical Graftingmentioning

confidence: 99%

Anthraquinone modification of microporous carbide derived carbon films for on-chip micro-supercapacitors applications

Brousse

Martin²,

Brisse

et al. 2017

Electrochimica Acta

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. A B S T R A C TThe modification of carbide derived carbon (CDC) thin film electrodes with anthraquinone (AQ) molecules was demonstrated by using pulsed chronoamperometry, in 0.1 M NEt 4 BF 4 /ACN solution of AQ diazonium derivative. The functionalization of CDC electrodes was only possible when a critical pore size is reached: only 2 nm pore diameter CDC can be grafted with AQ moieties, smaller pore size leading to a poorly functionalized electrode. High AQ surface coverage of 0.88 Â 10 À10 mol.cm À2 was determined using 2 nm pore size CDC. Despite a decrease in double layer capacitance value of about 10%, the total capacitance of the AQ-modified on-chip CDC electrodes was twice larger than that of pristine CDC film, leading to high total capacitance value of 44 mF.cm À2 (338 F.cm À3). The cyclability of the AQ-modified onchip CDC electrode was also investigated. The faradic contribution of AQ grafted molecules progressively decreased during cycling and only 39% of the normalized capacity remained after 500 cycles; this decrease has been assigned to electrostatic repulsion of dianionic AQ confined in narrow micropores in the alkaline media.

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“…The AQ-mediated electrochemical reduction of oxygen is known but the mechanistic pathway is not. [7,8] Overall, at pH's below~8, the…”

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confidence: 96%

Semiquinone Intermediates in the Two‐Electron Reduction of Quinones in Aqueous Media and their Exceptionally High Reactivity towards Oxygen Reduction

Batchelor‐McAuley

Lawrence

et al. 2011

ChemPhysChem

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Spontaneous modification of glassy carbon surface with anthraquinone from the solutions of its diazonium derivative: An oxygen reduction study

Cited by 73 publications

References 91 publications

Carbon Nanoparticle Surface Electrochemistry: High‐Density Covalent Immobilisation and Pore‐Reactivity of 9,10‐Anthraquinone

Carbon Nanoparticle Surface Electrochemistry: High‐Density Covalent Immobilisation and Pore‐Reactivity of 9,10‐Anthraquinone

Anthraquinone modification of microporous carbide derived carbon films for on-chip micro-supercapacitors applications

Semiquinone Intermediates in the Two‐Electron Reduction of Quinones in Aqueous Media and their Exceptionally High Reactivity towards Oxygen Reduction

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