The solubility and diffusion coefficient of oxygen in potassium hydroxide solutions

Davis, R E; Horvath, George; Tobias, Charles W.

doi:10.1016/0013-4686(67)80007-0

Cited by 590 publications

(382 citation statements)

References 16 publications

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“…The current densities for reduction in 8 M KOH are much reduced compared with those in 1 M KOH (cf. figures 3 and 4); this arises because of the much decreased solubility of oxygen, with both increasing KOH concentration and temperature, an overall factor > 25, as well as a significant decrease in the diffusion coefficient due to the higher viscosity of 8 M KOH [26][27][28]. Even so, comparing the responses in figures 3 Generally, the catalyst composition contains carbon or graphene and its influence has not been explored.…”

Section: Oxygen Evolution and Reductionmentioning

confidence: 99%

Comparison of the Spinels Co 3 O 4 and NiCo 2 O 4 as Bifunctional Oxygen Catalysts in Alkaline Media

Pletcher

Price

et al. 2016

Electrochimica Acta

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Data from experiments with both rotating disc electrodes (RDEs) and gas diffusion electrodes (GDEs) are used to investigate the properties of the spinels, Co3O4 and NiCo2O4, as bifunctional oxygen electrocatalysts. Emphasis is placed on catalyst compositions and electrode structures free of carbon. Oxygen evolution and reduction occur at surfaces where the transition metals are in different oxidation states but the surface can be repeatedly cycled between these two states without significant change. It is shown that carbon-free, NiCo2O4 catalysed GDEs can be fabricated using structures based on stainless steel cloth or nickel foam. Those based on nickel foam can be cycled extensively and allow both O2 evolution and reduction at current densities up to 100 mA cm -2 .

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Section: Oxygen Evolution and Reductionmentioning

confidence: 99%

Comparison of the Spinels Co 3 O 4 and NiCo 2 O 4 as Bifunctional Oxygen Catalysts in Alkaline Media

Pletcher

Price

et al. 2016

Electrochimica Acta

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“…[57,78] A set of ORR polarisation curves of approximately 30 nm Au spheres and Au octahedra is shown in Figure 9; similar two-wave polarisation curves were obtained for all the Au/C catalysts studied ( Figure 10 . [79] The value of n is a function of electrode potential as is typical for Au-based cat- These are not the final page numbers! ÞÞ CHEMELECTROCHEM ARTICLES www.chemelectrochem.org 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32...…”

Section: O 2 Reduction On Au/c Catalysts In 01 M Kohmentioning

confidence: 99%

Shape‐Dependent Electrocatalysis: Oxygen Reduction on Carbon‐Supported Gold Nanoparticles

et al. 2014

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Cubic, octahedral and quasi‐spherical (two different particle sizes) Au nanoparticles are synthesised and dispersed in a carbon‐black powder. The size and morphology of the Au nanocatalysts is confirmed by transmission electron microscopy and X‐ray diffraction. Au nanospheres are approximately 5 and 30 nm in diameter, whereas the size of Au octahedra and nanocubes is approximately 40–45 nm. The electrocatalytic activity of these carbon‐supported particles towards the oxygen reduction reaction (ORR) is studied in 0.5 M H2SO4 and 0.1 M KOH solutions by using the rotating‐disk‐electrode method. The specific activity (SA) for O2 reduction is measured, and the highest SA is observed for Au nanocubes supported on carbon. The highest mass activities are found for the smallest Au nanoparticles. Tafel analysis suggests that the mechanism of the ORR on shape‐controlled Au/C catalysts is the same as on bulk Au.

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“…The electron transfer number of the reaction was determined by using equation 2. The oxygen concentration and the diffusion constant of oxygen in 0.1 M KOH at 23 °C are 1.2• 10 −6 mol cm −3 and 1.9•10 −5 cm 2 s −1 [73], respectively, while the kinetic viscosity of the solution is 1.09• 10 −2 cm 2 s −1 [71].…”

Section: Oxygen Reduction Reaction In Alkaline Mediamentioning

confidence: 99%

One step synthesis of chlorine-free Pt/Nitrogen-doped graphene composite for oxygen reduction reaction

Varga

Ballai

et al. 2018

Carbon

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The solubility and diffusion coefficient of oxygen in potassium hydroxide solutions

Cited by 590 publications

References 16 publications

Comparison of the Spinels Co 3 O 4 and NiCo 2 O 4 as Bifunctional Oxygen Catalysts in Alkaline Media

Comparison of the Spinels Co 3 O 4 and NiCo 2 O 4 as Bifunctional Oxygen Catalysts in Alkaline Media

Shape‐Dependent Electrocatalysis: Oxygen Reduction on Carbon‐Supported Gold Nanoparticles

One step synthesis of chlorine-free Pt/Nitrogen-doped graphene composite for oxygen reduction reaction

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