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

Comninellis, Christos and Michaud, Sandra and Savall, André and Serrano, E. Electrochemical preparation of peroxodisulfuric acid using boron doped diamond thin film electrodes. (2002) Electrochimica Acta, Vol.48 (n°4). pp.431-436. ISSN 0013-4686

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Official URL: http://dx.doi.org/10.1016/S0013-4686(02)00688-6

Abstract

We have investigated the electrochemical oxidation of sulfuric acid on boron-doped synthetic diamond electrodes (BDD) obtained by HF CVD on p-Si. The results have shown that high current efficiency for sulfuric acid oxidation to peroxodisulfuric acid can be achieved in concentrated H2SO4 (>2 M) at moderate temperatures (8–10 °C). The main side reaction is oxygen evolution. Small amounts of peroxomonosulfuric acid (Caro's acid) have also been detected. A reaction mechanism involving hydroxyl radicals, HSO4− and undissociated H2SO4 has been proposed. According to this mechanism electrogenerated hydroxyl radicals at the BDD anode react with HSO4− and H2SO4 giving peroxodisulfate.

Item Type:Article
Additional Information:Thanks to Elsevier editor.The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Electrochimica Acta journal website:http://www.sciencedirect.com/science?_ob=ArticleListURL&_method=list&_ArticleListID=952464125&_sort=r&view=c&_acct=C000043979&_version=1&_urlVersion=0&_userid=1072870&md5=d0fe67b21a2585f9155aa5d52f4f6899
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Guylène Abadie

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