Publication

Electrochemical preparation of peroxodisulfuric acid using boron doped diamond thin film electrodes

Christos Comninellis, Pierre-Alain Michaud
2002
Journal Articles

Abstract

The authors have studied the electrochem. oxidn. of H2SO4 on B-doped synthetic diamond electrodes (BDD) obtained by hot filament CVD on p-Si. High current efficiency for H2SO4 oxidn. to peroxodisulfuric acid can be achieved in concd. H2SO4 (>2M) at moderate temps. (8-10 Deg). The main side reaction is oxygen evolution. Small amts. of peroxomonosulfuric acid (Caro's acid) also were detected. A reaction mechanism involving hydroxyl radicals, HSO4- and undissociated H2SO4 is proposed. According to this mechanism electrogenerated hydroxyl radicals at the BDD anode react with HSO4- and H2SO4 giving peroxodisulfate. [on SciFinder (R)]

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https://infoscience.epfl.ch/entities/publication/f9032594-0416-47ca-8bc1-2ad22fafc695

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Christos Comninellis, Pierre-Alain Michaud
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/f9032594-0416-47ca-8bc1-2ad22fafc695

About this result

Related concepts (32)

Acid strength

Acid strength is the tendency of an acid, symbolised by the chemical formula HA, to dissociate into a proton, H+, and an anion, A-. The dissociation of a strong acid in solution is effectively complete, except in its most concentrated solutions. HA -> H+ + A- Examples of strong acids are hydrochloric acid (HCl), perchloric acid (HClO4), nitric acid (HNO3) and sulfuric acid (H2SO4). A weak acid is only partially dissociated, with both the undissociated acid and its dissociation products being present, in solution, in equilibrium with each other.

Acid dissociation constant

In chemistry, an acid dissociation constant (also known as acidity constant, or acid-ionization constant; denoted K_a) is a quantitative measure of the strength of an acid in solution. It is the equilibrium constant for a chemical reaction HA A^- + H^+ known as dissociation in the context of acid–base reactions. The chemical species HA is an acid that dissociates into , the conjugate base of the acid and a hydrogen ion, .

Neutralization (chemistry)

In chemistry, neutralization or neutralisation (see spelling differences) is a chemical reaction in which acid and a base react with an equivalent quantity of each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution. The pH of the neutralized solution depends on the acid strength of the reactants. In the context of a chemical reaction the term neutralization is used for a reaction between an acid and a base or alkali.

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Electrochemical preparation of peroxodisulfuric acid using boron doped diamond thin film electrodes

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