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

被引：273

作者：

Serrano, K

Michaud, PA

Comninellis, C

Savall, A

机构：

[1] Univ Toulouse 3, UMR 5503, Lab Genie Chim, F-31062 Toulouse 04, France

[2] Swiss Fed Inst Technol, Inst Chem Engn, CH-1015 Lausanne, Switzerland

来源：

ELECTROCHIMICA ACTA | 2002年 / 48卷 / 04期

关键词：

diamond electrode; electrosynthesis; sulfuric acid; peroxodisulfuric acid;

D O I：

10.1016/S0013-4686(02)00688-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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 degreesC). 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. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：431 / 436

页数：6

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