Oxygen reduction on phenanthrenequinone-modified glassy carbon electrodes in 0.1 M KOH

Vaik, Katri; Sarapuu, Ave; Tammeveski, Kaido; Mirkhalaf, Fakhradin; Schiffrin, David J.

doi:10.1016/j.jelechem.2003.08.024

Cited by 148 publications

(146 citation statements)

References 28 publications

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“…The number of electrons associated with the O 2 reduction on a bare GCE is known to be around 2. 35 In previous work, both two-31,32 and fourelectron 27 reduction of O 2 on Cu(II)-complex adsorbed EPG surfaces were found. The extrapolated Koutechy-Levich plot for ω −1/2 = 0 has an intercept other than zero, which indicates a mixed kinetic-diffusion controlled mechanism.…”

Section: Resultsmentioning

confidence: 88%

Electrocatalysis of Oxygen Reduction by Cu-containing Polymer Films on Glassy Carbon Electrodes

Kim

Gewirth²

2007

Bulletin of the Korean Chemical Society

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The catalytic activity of poly[(2,2'-bipyridine)copper(II)-μ 4 -oxalato] coated on a glassy carbon electrode (GCE) for O 2 electroreduction is examined using cyclic voltammetry and rotating disk electrode techniques. The cyclic voltammograms show that O 2 is electroreduced on pBpCuOx-coated GCE surfaces at a peak potential of − 0.25 V in pH 4.7 acetate buffer media. The electroreduction of O 2 on pBpCuOx-coated GCE occurs at 450 mV more positive potential than that found at a bare GCE. The catalytic activity originates from Cu(II) coordinated by bipyridine in the complexes and the polymer type Cu-complex films exhibit an enhanced stability compared to monomeric Cu-complexes during the O 2 electroreduction. The rotating disk electrode measurements reveal that the electroreduction of O 2 on pBpCuOx-coated GCE is a four-electron process. Kinetic parameters for O 2 reduction on pBpCuOx-coated GCE are obtained from rotating disk experiments and compared with those on bare glassy carbon electrode surfaces.

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Section: Resultsmentioning

confidence: 88%

Electrocatalysis of Oxygen Reduction by Cu-containing Polymer Films on Glassy Carbon Electrodes

Kim

Gewirth²

2007

Bulletin of the Korean Chemical Society

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“…The polymer showed the oximidato C=O stretching vibration at 1602 cm -1 along with C=N stretching vibration 1686 cm -1 , which prove the incorporation of copper complex. The polymer showed a single broad band at 1089 cm -1 (ν 3 antisymmetric stretching), which does not show any split, and a medium band at 650 cm -1 (ν 4 antisymmetric bending) due to uncoordinated perchlorate ion [37]. The UV-vis spectrum (Fig.…”

Section: Resultsmentioning

confidence: 96%

“…From the slope of the Koutechy-Levich plot (-0.5 V), the number of electrons involved in the catalytic reduction of O 2 is calculated to be 3.8, which indicates that the catalytic reduction of oxygen on PAlACulbpy/PCE is four electron process. The electroreduction of oxgen on a bare GCE is known to be around 2 electron process [37]. The extrapolated Koutechy-Levich plot is not passing through zero, which is probably due to the equilibrium between O 2 and H 2 O 2 .…”

Section: Hydrodynamic Studiesmentioning

confidence: 93%

Biomimetic Copper Complex Containing Polymer Modified Electrode for Electrocatalytic Reduction of Oxygen

Saravanakumar

Nagarale

Jirimali

et al. 2016

Journal of Electrochemical Science and Technology

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The development of non-precious metal based electrocatalysts is highly desired for the oxygen reduction reaction (ORR) as alternates to noble metal based ORR electrocatalysts. Herein, we report mononulcear copper(II) complex [CuLbpy]ClO 4 (L=4-[(2-hydroxyphenylimino)methyl]benzoic acid) containing poly(allylamine.HCl) polymer (PAlACuLbpy) as an electrocatalyst for oxygen reduction reaction (ORR). PAlACuLbpy was mixed with poly(acrylic acid) and tetraethylortho silicate to prepare a composite and then deposited on the screen printed electrode surface. The modified electrode (PAlACuLbpy/PCE) is highly stable and showed a quasi-reversible redox behavior with E 1 / 2 = -0.2 V vs. Ag/AgCl(3 M KCl) in 0.1 M phosphate buffer at pH 7 under argon atmosphere. PAlACuLbpy/PCE exhibited a remarkable ORR activity with an onset potential of -0.1 V vs Ag/AgCl in 0.1 M PB (pH 7) in the presence of oxygen. The kinetics for ORR was studied by rotating disk voltammetry in neutral aqueous medium and the results indicated that the number of electrons involving in the ORR is four and the conversion products are water and hydrogen peroxide.

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“…On the other hand, carbon ORR catalysis was proposed to occur on the armchair edge [25][26][27] , based on experimental studies reporting the 2e -ORR on chemically similar quinone. [28][29] Based on the Tafel slopes, two mechanisms were proposed for glassy carbon 30 …”

Section: Introductionmentioning

confidence: 99%

The Oxygen Reduction Reaction on Graphene from Quantum Mechanics: Comparing Armchair and Zigzag Carbon Edges

Ly¹,

Merinov

Xiao

et al. 2017

J. Phys. Chem. C

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Using density functional theory (PBE-D2 flavor), we report the mechanism for the oxygen reduction reaction (ORR) on graphene sheets. We find that ORR starts with OO chemisorbing onto the carbon edges, rather than the basal plane face, which is not energetically favorable. The carbon edges were described as one-dimensional periodic graphene ribbons with both armchair and zigzag edges. We calculated the binding energies of the ORR products (OO, OOH, O, OH, HOH, HOOH) for the zigzag and armchair edges, examining both the Langmuir–Hinshelwood (LH) and Eley–Rideal (ER), to understand how OO is reduced. For the armchair edge, we calculate an onset potential of 0.55 V vs reversible hydrogen electrode (RHE), which corresponds to −0.22 V at pH 13 in agreement with experiments. We find that the rate-determining step (RDS) to form peroxide (a 2e– process) is hydrogenation of adsorbed OO with a barrier of 0.92 eV. The process to make water (a 4e– process) was found to be unfavorable at the onset potential but becomes more favorable at lower potentials. Thus, undoped carbon catalysts prefer the 2e– mechanism to form peroxide, rather than the 4e– process to form water, which agrees with experiment. The predictions open the route for experimental studies to improve the sluggish ORR on carbon catalysts.

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Oxygen reduction on phenanthrenequinone-modified glassy carbon electrodes in 0.1 M KOH

Cited by 148 publications

References 28 publications

Electrocatalysis of Oxygen Reduction by Cu-containing Polymer Films on Glassy Carbon Electrodes

Electrocatalysis of Oxygen Reduction by Cu-containing Polymer Films on Glassy Carbon Electrodes

Biomimetic Copper Complex Containing Polymer Modified Electrode for Electrocatalytic Reduction of Oxygen

The Oxygen Reduction Reaction on Graphene from Quantum Mechanics: Comparing Armchair and Zigzag Carbon Edges

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