Publication

Electrogeneration of Hydroxyl Radicals on Boron-Doped Diamond Electrodes

Christos Comninellis, Pierre-Alain Michaud
2003
Journal Articles

Abstract

The electrogeneration of hydroxyl radicals was studied at a synthetic B-doped diamond (BDD) thin film electrode. Spin trapping was used for detection of hydroxyl radicals with 5,5-dimethyl-1-pyrroline-N-oxide and with salicylic acid using ESR and liq. chromatog. measurements, resp. The prodn. of H2O2 and competitive oxidn. of formic and oxalic acids were also studied using bulk electrolysis. Oxidn. of salicylic acid gives hydroxylated products (2,3- and 2,5-dihydroxybenzoic acids). The oxidn. process on BDD electrodes involves hydroxyl radicals as electrogenerated intermediates. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/21e56d43-2e27-43d6-9c8d-2fd314c53f81

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Christos Comninellis, Pierre-Alain Michaud
2003
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/21e56d43-2e27-43d6-9c8d-2fd314c53f81

About this result

Related concepts (17)

Spin trapping

Spin trapping is an analytical technique employed in chemistry and biology for the detection and identification of short-lived free radicals through the use of electron paramagnetic resonance (EPR) spectroscopy. EPR spectroscopy detects paramagnetic species such as the unpaired electrons of free radicals. However, when the half-life of radicals is too short to detect with EPR, compounds known as spin traps are used to react covalently with the radical products and form more stable adduct that will also have paramagnetic resonance spectra detectable by EPR spectroscopy.

Hydroxyl radical

The hydroxyl radical is the diatomic molecule •OH. The hydroxyl radical is very stable as a dilute gas, but it decays very rapidly in the condensed phase. It is pervasive in some situations. Most notably the hydroxyl radicals are produced from the decomposition of hydroperoxides (ROOH) or, in atmospheric chemistry, by the reaction of excited atomic oxygen with water. It is also important in the field of radiation chemistry, since it leads to the formation of hydrogen peroxide and oxygen, which can enhance corrosion and SCC in coolant systems subjected to radioactive environments.

Radical (chemistry)

In chemistry, a radical, also known as a free radical, is an atom, molecule, or ion that has at least one unpaired valence electron. With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spontaneously dimerize. Most organic radicals have short lifetimes. A notable example of a radical is the hydroxyl radical (HO·), a molecule that has one unpaired electron on the oxygen atom. Two other examples are triplet oxygen and triplet carbene (꞉CH2) which have two unpaired electrons.

Related publications (3)

Electrogeneration of Hydroxyl Radicals on Boron-Doped Diamond Electrodes

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Investigation of the Electrochemical Destruction of X-ray Contrast Media using Boron-‐Doped Diamond Electrodes (BDD)

Electrochemical oxidation of phenol at boron-doped diamond electrode

Oxidation of carboxylic acids at boron-doped diamond electrodes for wastewater treatment

Electrogeneration of Hydroxyl Radicals on Boron-Doped Diamond Electrodes

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Investigation of the Electrochemical Destruction of X-­ray Contrast Media using Boron-­‐Doped Diamond Electrodes (BDD)

Electrochemical oxidation of phenol at boron-doped diamond electrode

Oxidation of carboxylic acids at boron-doped diamond electrodes for wastewater treatment

Investigation of the Electrochemical Destruction of X-ray Contrast Media using Boron-‐Doped Diamond Electrodes (BDD)