Study of influence of substituents in carboxylic acid structure in the electrochem...
| Full text | |
| Author(s): |
Aquino de Queiroz, Jorge Leandro
;
Lopes da Silva, Amison Rick
;
Chianca de Moura, Dayanne
;
Ribeiro da Silva, Djalma
;
Martinez-Huitle, Carlos A.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 794, p. 204-211, JUN 1 2017. |
| Web of Science Citations: | 11 |
| Abstract | |
The present study was motivated by the reports that promote the use of boron doped diamond (BDD) anode for electrochemical oxidation (EO) of different organic compounds. EO approach on BDD proceeds via electrochemical generation (by water discharge) of hydroxyl radicals and their subsequent reactions. Although the discussion about the degradation of different organic compounds on Si-supported BDD anodes has been already reported; no attempts have been published about the electrochemical degradation of carboxylic acids (acetic, formic and oxalic acids) on Nb/BDD electrode. The interest to elucidate the mechanisms for removing carboxylic acids from water, as a model reaction, contributes to the understanding of more complex reactions involving organic pollutants. In this work, the results clearly demonstrate that organic molecules can be degraded in different way and level by using 0.25 M HClO4 as supporting electrolyte due to the oxidants electrochemically generated as well as the interaction of carboxylic acid with BDD surface by adsorbed/non-adsorbed intermediates. The direct evidence for these processes was found during potentiodynamic measurements and bulk electrolysis of carboxylic acids resulting in different evolution of organic matter removals. The strong oxidants as well as the oxidation potentials were analyzed by spin trapping and voltanunetry kinetic studies, respectively. (AU) | |
| FAPESP's process: | 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies |
| Grantee: | Maria Valnice Boldrin |
| Support type: | Research Projects - Thematic Grants |