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

被引：261
|
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
收藏
页码：431 / 436
页数：6
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