| Full text | |
| Author(s): |
Cordeiro-Junior, Paulo Jorge Marques
;
Lanza, Marcos Roberto de Vasconcelos
;
Rodrigo, Manuel Andres Rodrigo
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Chemical Engineering Science; v. 273, p. 10-pg., 2023-03-23. |
| Abstract | |
In this work, the electrosynthesis of hydrogen peroxide from the oxygen reduction reaction is evaluated using a flow-by electrochemical cell under different operation conditions and electrodes. In addition, a phenomenological model is proposed to understand the processes that occur inside the electrochemical reactor, and how the predatory species act against the production of H2O2 at high concentrations. In com-paring different types of anodes, the electrosynthesis of H2O2 is almost twice as efficient when using DSA-Cl2 instead of BDD as the anode, which allowed it to reach concentrations as high as 4.2 g L-1. The rate of decomposition of H2O2 is higher when the more vigorous anode is used. This decomposition is not only caused by the H2O2 on the anode surface or by its self-decomposition within the bulk, but it is mostly related to the electrochemical processes of production of H2O'2s predatory species such as ozone and per-oxymonopersulfate. The formulated phenomenological model explains and satisfactorily reproduces the influence of anode type, electrolyte, and current density on the electrosynthesis of H2O2 at high concen-trations obtaining regression coefficients higher than 0.99. (c) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). (AU) | |
| FAPESP's process: | 20/13088-7 - Modified gas diffusion electrodes applied in the degradation of organic pollutants in a flow electrochemical reactor |
| Grantee: | Paulo Jorge Marques Cordeiro Junior |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate (Direct) |
| FAPESP's process: | 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination |
| Grantee: | Marcos Roberto de Vasconcelos Lanza |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/19612-4 - Degradation of endocrine disruptors carbofuran, methylparaben and propylparaben via electrogenerated H2O2 and associated processes (electrogenerated H2O2/UV, electro-Fenton e photoelectro-Fenton) |
| Grantee: | Paulo Jorge Marques Cordeiro Junior |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |