| Texto completo | |
| Autor(es): |
Cursi, Fabiano S.
;
Grimaud, Laurie
;
Rousseau, Julie
;
Servat, Karine
;
Morais, Claudia
;
Napporn, Teko W.
;
de Andrade, Adalgisa R.
;
Kokoh, K. Boniface
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMELECTROCHEM; v. 11, n. 3, p. 13-pg., 2024-01-09. |
| Resumo | |
Glycerol electro-oxidation reaction was performed in an alkaline environment with an anion exchange membrane fuel cell (AEMFC) operating in bath mode at low Pt-loadings. BAE-synthesized Pt/C and PtCe/C nanostructured catalysts were used as anode materials during 4-hour operation to selectively obtain 65 % and 41 % of glycerate as main product, respectively. The modification of Pt with Ce improved the catalytic activity of the Pt/C catalyst generating 30 % more energy density after 4-hour operation by achieving a higher degree of glycerol oxidation in cogeneration with added-value products confirmed by spectroelectrochemical (in situ FTIR) and liquid chromatography coupled with mass spectrometry (LC-MS) analyses. The bifunctional mechanism generated by the presence of Ce is used to explain the improvement in the catalytic activity of Pt/C, due to the properties of this rare earth element to adsorb oxygenated species (OH-) and promote oxidation. The cathode material was a polyol-synthesized PdFe/C electro-catalyst for ORR that presented impressive stability and tolerance to glycerol. The glycerol oxidation in a cogeneration process leads to value added products (VAP) on Pt/C or provides more energy on PtCeO2/C in a direct glycerol fuel cell (DGFC).image (AU) | |
| Processo FAPESP: | 21/01134-7 - Valorização eletroquímica da molécula de glicerol: desenvolvimento de uma célula eletrolítica microbiana (MEC) para produção de bio-hidrogênio (Bio-H2) e produtos de alto valor agregado em uma célula do tipo PEM |
| Beneficiário: | Adalgisa Rodrigues de Andrade |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOEN - Regular |