| Autor: |
Duarte, J. L. S., Soares, W. M. G., Gomes, L. M., Tonholo, J., Zanta, C. L. P. S. |
| Zdroj: |
Electrocatalysis; Dec2013, Vol. 4 Issue 4, p320-328, 9p |
| Abstrakt: |
Oxidation processes introduce structural changes in organic substrates. Electrooxidation is an alternative synthetic route that can help scientists conduct desired changes in organic compounds. In this study, we investigated the Ti/Ru XTi (1 − X)O 2 system and used safrole (SF) as model substrate, to understand the role played by electrode composition in organic substances oxidation. We characterized the surface of the prepared electrodes and conducted controlled potential electrolysis with potential pulse, which oxidized 98 % SF. Electrode efficiency depended on the electrode composition—higher RuO 2 concentration led to a more efficient process. Our results showed that all the electrodes generated the same intermediates regardless of the composition, indicating that the same reaction mechanism occurred in all cases, as corroborated by mechanistic parameters. Electrolysis under controlled current generated the same intermediates as electrolysis under controlled potential. The main difference between these two types of electrolyses was that controlled current promoted at least five times faster reaction, which resulted in substrate mineralization, an outcome that is not interesting for the synthetic process. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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