| Texto completo | |
| Autor(es): |
Melle, Gabriel
;
Rodes, Antonio
;
Feliu, Juan M.
;
Herrero, Enrique
;
Angelucci, Camilo A.
;
Del Colle, Vinicius
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS CATALYSIS; v. 15, n. 3, p. 12-pg., 2025-01-23. |
| Resumo | |
This study explores the electrochemical properties of rhodium polycrystalline electrodes applied to the glycerol oxidation reaction (GOR) in an alkaline medium. Our findings demonstrate that rhodium (Rh) surfaces exhibit catalytic activity by facilitating C-C bond cleavage at low potentials. Employing in situ Fourier-transform infrared (FTIR) spectroscopy, it was possible to identify carboxylates and carbon monoxide in bridge configuration (COB) as the primary intermediates in GOR. At lower potentials, glycerol oxidation predominantly yields COB, which oxidizes to CO2. Carboxylate compounds, such as tartronate and oxalate, emerge as the main products, highlighting the intricate reaction mechanisms facilitated by Rh surfaces. Additionally, an oscillatory pattern in the GOR process was observed, whose frequency increases with the glycerol concentration, indicating a strong correlation between glycerol and oscillatory behavior, once COB already formed at a low potential is the primary cause for sustaining the oscillatory process. Therefore, the insights gained from this study enhance our understanding of GOR on Rh surfaces and contribute to the development of advanced electrocatalysts for biomass-derived fuel conversion, with potential applications in electrolyzers and fuel cells. (AU) | |
| Processo FAPESP: | 18/10292-2 - Espectroscopia Raman amplificada por superfície (SERS) aplicado a processos eletroquímicos. |
| Beneficiário: | Camilo Andrea Angelucci |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 22/11345-8 - Processo de transformação eletrocatalítica de polióis assistido por mediadores redox |
| Beneficiário: | Camilo Andrea Angelucci |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |