| Texto completo | |
| Autor(es): |
Machado, Marina
;
Rodrigues, Lays N.
;
Vilela, Vanessa B.
;
Moraes, Tamara S.
;
Ferlauto, Andre S.
;
Fonseca, Fabio C.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS APPLIED ENERGY MATERIALS; v. 7, n. 5, p. 11-pg., 2024-02-16. |
| Resumo | |
Matching the catalytic activity of nanostructured materials and processing parameters for high-temperature electrochemical devices is a challenge. Controlling the nanoparticle shape has been proposed as an alternative method to stabilize crystalline surfaces to inhibit particle coarsening and sustain catalytic activity after high-temperature treatment. In this study, nickel-based catalysts supported on shape-controlled (nanorods and nanocubes) gadolinium-doped cerium oxide (GDC) were evaluated for the steam reforming reaction of ethanol, aiming at direct ethanol solid oxide fuel cells (SOFC). The morphology of the support was shown to have an important role in the catalytic activity, particularly when heat treatments for fuel cell fabrication are considered. The Ni catalyst supported on the GDC nanorods sustained the highest catalytic activity after heat treatment despite the morphology change of the support at high temperatures. The excellent properties of the shape-controlled materials were demonstrated in SOFC using the Ni-GDC catalytic layer tailored for the operation on anhydrous ethanol at 700 degrees C. The fuel cell exhibited a stable performance for more than 100 h of continuous operation without any sign of degradation due to carbon deposition. Such a result is an important step toward the stable operation of direct ethanol intermediate temperature solid oxide fuel cells. (AU) | |
| Processo FAPESP: | 22/06295-1 - Conversão eletroquímica oxidativa do metano |
| Beneficiário: | Marina Machado Livinalli |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 17/11937-4 - Rota sustentável para a conversão de metano com tecnologias eletroquímicas avançadas |
| Beneficiário: | Fabio Coral Fonseca |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia |
| Processo FAPESP: | 19/04499-6 - Desenvolvimento de ânodos com camadas catalíticas para células a combustível de óxidos sólidos a etanol direto |
| Beneficiário: | Marina Machado Livinalli |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 19/15110-2 - Desenvolvimento de catalisadores core-shell para reação de reforma a vapor do etanol |
| Beneficiário: | Tamara Siqueira Moraes |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |