Article

Journal of Applied Electrochemistry

, Volume 33, Issue 2, pp 151-154

Electrochemical oxidation of water on synthetic boron-doped diamond thin film anodes

  • P-A. MichaudAffiliated withSwiss Federal Institute of Technology, ISP-BS
  • , M. PanizzaAffiliated withDipartimento di Ingegneria Chimica e di Processo, Università di Genova
  • , L. OuattaraAffiliated withLaboratoire de Chimie Physique, Université Cocody
  • , T. DiacoAffiliated withDipartimento di Ingegneria Chimica e di Processo, Università di Genova
  • , G. FotiAffiliated withSwiss Federal Institute of Technology, ISP-BS
  • , Ch. ComninellisAffiliated withSwiss Federal Institute of Technology, ISP-BS Email author 

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Abstract

Electrolysis in aqueous 1 M HClO4 and 1 M H2SO4 solutions has been carried out under galvanostatic conditions using boron-doped diamond electrodes (BDD). Analyses of the oxidation products have shown that in 1 M HClO4 the main reaction is oxygen evolution, while in H2SO4 the main reaction is the formation of H2S2O8. In both electrolytes small amounts of O3 and H2O2 are formed. Finally, a simplified mechanism involving hydroxyl radicals formed by water discharge has been proposed for water oxidation on boron-doped diamond anodes.

boron-doped diamond electrode hydroxyl radical water oxidation