Electrochemical oxidation of Mn2+ on boron-doped diamond electrodes with Bi3+ used as an electron transfer mediator
SCIE
SCOPUS
- Title
- Electrochemical oxidation of Mn2+ on boron-doped diamond electrodes with Bi3+ used as an electron transfer mediator
- Authors
- Lee, J; Einaga, Y; Fujishima, A; Park, SM
- Date Issued
- 2004-01
- Publisher
- ELECTROCHEMICAL SOC INC
- Abstract
- Electrochemical oxidation of Mn2+ with and without the presence of Bi3+ was studied using voltammetric and in situ spectro-electrochemical techniques at boron-doped diamond (BDD) electrodes in 1.0 M HClO4. Electrochemical oxidation of only Mn2+ resulted in the formation of mostly MnO2 with MnO4- produced as a minor product. The MnO2 film formed on the electrode surface, which is an inevitable part of Mn2+ oxidation, shows a blocking effect on the formation of MnO4-, and reduces the overall current efficiency of MnO4- production. Higher Mn2+ concentrations result in less MnO4- production due to the formation of more MnO2. The addition of Bi3+ increased the current efficiency of MnO4- production. The Bi3+ is oxidized to Bi(V), which acts as an electrocatalyst in MnO4- production. The Bi(V) oxidizes MnO2, formed on the electrode surface, to MnO4-. This increases the production of MnO4- by removing the blocking film to provide an active electrode (bare BDD) surface, which is available for further Mn2+ oxidation. (C) 2004 The Electrochemical Society.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/11139
- DOI
- 10.1149/1.1765679
- ISSN
- 0013-4651
- Article Type
- Article
- Citation
- JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 151, no. 8, page. E265 - E270, 2004-01
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.