| Texto completo | |
| Autor(es): |
Pinto, Felipe M.
[1, 2]
;
Oliveira, Daniela C.
[3]
;
Resende, Karen A.
[1]
;
Fiuza, Tanna E. R.
[1, 4]
;
Bueno, Jose M. C.
[5]
;
Zanchet, Daniela
[1]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Campinas, UNICAMP, Inst Chem, POB 6154, BR-13083970 Campinas, SP - Brazil
[2] Univ Fed Lavras, Dept Engn, POB 3037, BR-37200900 Lavras, MG - Brazil
[3] Brazilian Synchrotron Light Lab LNLS, POB 6192, BR-13087500 Campinas, SP - Brazil
[4] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083100 Campinas, SP - Brazil
[5] Univ Fed Sao Carlos, Dept Chem Engn, POB 676, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMISTRYSELECT; v. 6, n. 41, p. 11188-11197, NOV 8 2021. |
| Citações Web of Science: | 1 |
| Resumo | |
Ni-CeO2 nanorods catalysts (1-10 wt% Ni loadings) were evaluated in steam reforming of ethanol (SRE). Ex situ and in situ characterization showed two populations of Ni species according to Ni loading: (i) one highly dispersed, strongly interacting with CeO2 (Ni-sup) and (ii) another one formed by Ni nanoparticles (Ni-bulk). While the metal loading impacted on the Ni-bulk fraction, the Ni-sup population remained similar, leading to similar activities of the catalysts toward SRE. The results highlight the role of the Ni-sup fraction in the catalyst performance. Nevertheless, we found that while Ni-bulk species favored carbon deposition, the Ni-sup species were easily oxidized at low temperatures, leading to catalyst deactivation. The results suggest that the co-existence of both Ni species may stabilize the reduced form of the Ni-sup species by hydrogen activation on the Ni-bulk species and represents a new strategy to be explored to optimize the activity and stability of SRE catalysts. (AU) | |
| Processo FAPESP: | 17/10966-0 - Impacto do suporte em catalisadores nanoestruturados na reação de hidrodesoxigenação do bio-óleo |
| Beneficiário: | Karen Abreu Resende |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 18/01258-5 - Novos processos catalíticos e fotocatalíticos para a conversão direta de metano e CO2 em produtos |
| Beneficiário: | José Maria Correa Bueno |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |