| Full text | |
| Author(s): |
Gromboni, Murilo Fernando
;
Marques Cordeiro-Junior, Paulo Jorge
;
Corradini, Patricia Gon
;
Mascaro, Lucia Helena
;
de Vasconcelos Lanza, Marcos Roberto
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Physical Chemistry Chemical Physics; v. 24, n. 17, p. 14-pg., 2022-03-30. |
| Abstract | |
Bimetallic oxides and MOFs have been used as catalysts for the ORR via two-electron and Fenton-based processes. This work reports the development of a new green one-step route for obtaining Co2V2O7. The Co2V2O7 oxide was immobilized on Printex-L6 carbon and used as a catalyst for the oxygen reduction reaction (ORR) and in heterogeneous Fenton-based processes. The PL6C/2.5% Co2V2O7 sample exhibited the best performance in the ORR via a two-electron pathway, increasing the selectivity for H2O2 generation. Electrochemical impedance spectroscopy analysis showed a decrease in charge transfer resistance in the Co2V2O7/PL6C matrix. The application of a gas diffusion electrode (GDE) modified with 2.5% Co2V2O7 resulted in a 30% increase in H2O2 production compared to the unmodified GDE. The unmodified GDE promoted methyl-paraben (MeP) removal of similar to 80% after 90 min treatment, whereas the modified GDE promoted similar to 90% of MeP removal in 30 min. The results obtained point to the potential of Co2V2O7 in improving the efficiency of GDE when applied for the treatment of organic pollutants. (AU) | |
| FAPESP's process: | 19/00288-0 - Degradation of antibiotics by electrochemical advanced oxidation processes |
| Grantee: | Murilo Fernando Gromboni |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 18/16401-8 - Photocatalysts and photoelectrodes for obtaining renewable fuels |
| Grantee: | Lucia Helena Mascaro Sales |
| Support Opportunities: | Regular Research Grants |
| 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: | 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 Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock |
| Grantee: | Arlene Gonçalves Corrêa |
| Support Opportunities: | Research Grants - Applied Research Centers Program |
| 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) |