Publication

Oxidation of organics by intermediates of water discharge on IrO2 and synthetic diamond anodes

Christos Comninellis, György Foti
1999
Journal Articles

Abstract

IrO2 and boron-doped diamond electrodes were tested by preparative electrolysis of simple model compds. in acid medium. In oxidn. reactions of more complex mechanism than simple electron transfer, these electrodes are active only at potentials of simultaneous oxygen evolution. At IrO2 electrodes, the reaction is mediated by chemisorbed oxygen, probably forming IrO3-type active sites, and yield highly selective oxidn. products at low overpotentials and with moderate current efficiency. At diamond electrodes, mediation at high overpotentials is due to physisorbed OH radicals leading to complete combustion of the org. compd. with high current efficiency. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/42574f49-46fe-48ae-99e4-18f512a19700

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Christos Comninellis, György Foti
1999
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/42574f49-46fe-48ae-99e4-18f512a19700

About this result

Related concepts (32)

Electrolysis of water

Electrolysis of water is using electricity to split water into oxygen (O2) and hydrogen (H2) gas by electrolysis. Hydrogen gas released in this way can be used as hydrogen fuel, but must be kept apart from the oxygen as the mixture would be extremely explosive. Separately pressurised into convenient 'tanks' or 'gas bottles', hydrogen can be used for oxyhydrogen welding and other applications, as the hydrogen / oxygen flame can reach circa 2,800°C. Water electrolysis requires a minimum potential difference of 1.

Working electrode

In electrochemistry, the working electrode is the electrode in an electrochemical system on which the reaction of interest is occurring. The working electrode is often used in conjunction with an auxiliary electrode, and a reference electrode in a three-electrode system. Depending on whether the reaction on the electrode is a reduction or an oxidation, the working electrode is called cathodic or anodic, respectively.

Combustion

Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combustion does not always result in fire, because a flame is only visible when substances undergoing combustion vaporize, but when it does, a flame is a characteristic indicator of the reaction. While activation energy must be supplied to initiate combustion (e.g.

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Oxidation of organics by intermediates of water discharge on IrO2 and synthetic diamond anodes

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