Surface redox catalysis for O2 reduction on quinone-modified glassy carbon electrodes

Tammeveski, Kaido; Kontturi, Kyösti; Nichols, Richard J.; Potter, Robert J.; Schiffrin, David J.

doi:10.1016/s0022-0728(01)00633-7

Cited by 360 publications

(326 citation statements)

References 25 publications

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“…The extrapolated Koutechy-Levich plot for ω −1/2 = 0 has an intercept other than zero, which indicates a mixed kinetic-diffusion controlled mechanism. 36 From the intercept in the Koutechy-Levich plot, we can evaluate the 1/ i K values at differential potentials and the i K value is further expressed as (2) where we can determine the standard rate constant k 0 . 33 The k 0 value for O 2 reduction on pBpCuOx-coated GCE is found to be 2 × 10 −3 cm s…”

Section: Resultsmentioning

confidence: 99%

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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: 99%

“…36 The pBpCuOx films on GCE surfaces convert the number of electrons for O 2 reduction from 2 to 4 and enhance the reaction kinetics compared to those observed on a bare GCE.…”

Section: Resultsmentioning

confidence: 99%

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 presence of two reduction peaks indicates that the ORR undergoes two processes, both attributed to the two-electron reduction of O 2 to HO 2´. It is believed that the ORR on GC is catalysed by the native quinone-type groups present on the GC surface [67][68][69]. However, it is important to note that for all studied materials, the current density values are higher as compared to that of bare GC (see Figure 5) indicating a better electrocatalytic activity for ORR on the graphene-based material, which is probably caused by a higher surface area of the catalyst materials.…”

Section: Oxygen Reduction Reaction On Graphene-based Nanomaterialsmentioning

confidence: 86%

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

et al. 2016

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Abstract:The aim of this study is to compare the electrochemical behaviour of graphene-based materials of different origin, e.g., commercially available graphene nanosheets from two producers and reduced graphene oxide (rGO) towards the oxygen reduction reaction (ORR) using linear sweep voltammetry, rotating disc electrode and rotating ring-disc electrode methods. We also investigate the effect of catalyst ink preparation using two different solvents (2-propanol containing OH´ionomer or N,N-dimethylformamide) on the ORR. The graphene-based materials are characterised by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. Clearly, the catalytic effect depends on the origin of graphene material and, interestingly, the electrocatalytic activity of the catalyst material for ORR is lower when using the OH´ionomer in electrode modification. The graphene electrodes fabricated with commercial graphene show better ORR performance than rGO in alkaline solution.

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“…Investigations with catalysts of the anthraquinone class to help hydrogen peroxide production have become common (see Table 1). The O 2 reduction reaction mechanism on the surface of anthraquinonemodified electrodes is represented by reactions: 8,9 Effects of the Modification of Gas Diffusion Electrodes by Organic Redox Catalysts …”

Section: Introductionmentioning

confidence: 99%

Effects of the modification of gas diffusion electrodes by organic redox catalysts for hydrogen peroxide electrosynthesis

Forti

Venâncio

Lanza

et al. 2008

J. Braz. Chem. Soc.

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Este trabalho apresenta um estudo comparativo da eficiência eletroquímica na eletrogeração de peróxido de hidrogênio in situ usando eletrodos da difusão gasosa modificados com os catalisadores orgânicos redox: 2-etilantraquinona, 2-terc-butilantraquinona e azobenzeno em meio de 0,1 mol L -1 H 2 SO 4 + 0,1 mol L -1 K 2 SO 4 , pH = 1. A produção de peróxido de hidrogênio está diretamente relacionada ao potencial aplicado e a concentração dos catalisadores adicionados. A modificação dos eletrodos resultou em um aumento significativo no rendimento de H 2 O 2 (30%) alcançando 850 mg L -1 e o sobrepotencial da reação de redução do oxigênio foi deslocado para valores menos negativos (400 mV vs Ag/AgCl para os eletrodos modificados com quinonas e 300 mV vs. Ag/AgCl para os eletrodos modificados com azobenzeno) comparado ao eletrodo de difusão gasosa não modificado, reduzindo o consumo de energia de 596,5 para 232,4 kWh kg -1. Os resultados indicaram que o melhor eletrodo para a eletrogeração do H 2 O 2 é o eletrodo de difusão gasosa modificado com 10% de 2-etilantraquinona, o qual apresentou a melhor relação custo/benefício. This paper reports a comparative study of the electrochemical performance of in situ hydrogen peroxide electrogeneration on gas diffusion electrodes modified by organic redox catalysts 2-ethylanthraquinone, 2-terc-butylanthraquinone and azobenzene in medium of 0.1 mol L -1 H 2 SO 4 plus 0.1 mol L -1 K 2 SO 4 , pH = 1. Hydrogen peroxide generation proved strongly dependent on the applied potential and on the concentration of added catalysts. Electrode modifications led to a significant increase in H 2 O 2 yield (30%) reaching 850 mg L -1 , and the overpotential for oxygen reduction shifted to less negative values (400 mV vs Ag/AgCl for electrodes modified by quinones and 300 mV vs Ag/AgCl for electrodes modified by azobenzene) compared to noncatalyzed gas diffusion electrodes, resulting in reduced energy consumption of 596.5 to 232.4 kWh kg -1 . The results indicated that the best electrode for H 2 O 2 electrogeneration is the gas diffusion electrode modified with 10% of 2-ethylanthraquinone, offering the best cost to benefit ratio.

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Surface redox catalysis for O2 reduction on quinone-modified glassy carbon electrodes

Cited by 360 publications

References 25 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

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

Effects of the modification of gas diffusion electrodes by organic redox catalysts for hydrogen peroxide electrosynthesis

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