A Reversible Oxygen Electrode

Berl, Walter G.

doi:10.1149/1.3071542

Cited by 109 publications

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“…If electrons are supplied by an external source it might be expected to become an effective catalyst for the ionization of oxygen because it forms peroxidic complexes most readily. Berl (1943) showed that activated carbon functions as an oxygen electrode which reversibly reduces oxygen to hydrogen peroxide. Unfortunately he did not indicate the manner in which the carbon was prepared.…”

Section: ( H ) the Adsorption Of A C I D S By " H " Carbonsmentioning

confidence: 99%

The Quinone-Hydroquinone character of activated carbon and carbon black

Garten¹,

Weiss²

1955

Aust. J. Chem.

115

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There are two extreme types of activated carbon and carbon black although structures intermediate between these two extremes are more usual. This work has established that in one extreme, the oxidized form (" H " carbon), the carbon has a pronounced quinonoid structure which creates a number of fixed olefinic bonds. In the other, the reduced form (" L " carbon), the structure is more aromatic and has the characteristics of a hydroquinone. Carbons having properties intermediate between those of a pure " H " or " L " carbon acquire some semiquinone characteristics and become less diamagnetic. It is experimentally shown that the chemical behaviour of these carbons parallels in many ways that of simple quinone-hydroquinone compounds. The quinonoid structure of an " H " carbon accounts for the formation of peroxygen complexes, its ability to catalyse the ionization of oxygen in the presence of an electron donor, its oxidizing properties, and its reactivity with rubber. The hydroquinone character of an " L " carbon is responsible for its ability to adsorb alkali, its reducing properties, and its ability to fog a photographic plate (" Russell effect "). The change in properties which occurs in chars carbonized above 650" C is due to the transition from an " L " to an " H " carbon.

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Section: ( H ) the Adsorption Of A C I D S By " H " Carbonsmentioning

confidence: 99%

The Quinone-Hydroquinone character of activated carbon and carbon black

Garten¹,

Weiss²

1955

Aust. J. Chem.

115

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“…Much earlier studies by Yeager, Krouse and Rao [53] on oxygen reduction in alkaline electrolyte containing peroxide showed that the equi librium could be attributed to this reaction. The only oddity here is that Yeager et al [53] and Bed [54] found…”

Section: Discussion Of Equilibrium Potentialsmentioning

confidence: 79%

Electrochemical behaviour of oxygen reduction on polymer carbon electrodes in alkaline media

Sequeira¹,

Santos²

2012

Russ J Electrochem

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The preparation of polymer carbon electrocatalysts by the controlled pyrolysis of polyfurfuryl alco hol polymer is described. The potentiostatic method was used to study the electrochemical behaviour of the oxy gen reduction reaction on the prepared catalyst electrodes in potassium hydroxide electrolyte. A pure polymer carbon electrode and a cobalt chloride doped polymer carbon electrode were shown to be active in oxygen reduction, but the electrode containing cobalt chloride seemed the most active. The main reaction product at the pure polymer electrode is hydrogen peroxide, involving two electrons, whereas at a poly(CoCl 2 ) electrode the reduction process reaches partly its ultimate state, and involves at most three electrons.

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“…This is also the case with aqueous electrolyte hydrogen/oxygen fuel cells, where the open circuit voltage is determined by the presence of peroxide, rather than oxide, ions [4][5][6]. This is shown in Fig.…”

Section: Zn/air Cellsmentioning

confidence: 98%

Primary, Nonrechargeable Batteries

Huggins

2010

Energy Storage

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A Reversible Oxygen Electrode

Cited by 109 publications

References 0 publications

The Quinone-Hydroquinone character of activated carbon and carbon black

The Quinone-Hydroquinone character of activated carbon and carbon black

Electrochemical behaviour of oxygen reduction on polymer carbon electrodes in alkaline media

Primary, Nonrechargeable Batteries

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