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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Contribution of Different Species in Ni-Ceria Nanorods Catalysts Applied to Steam Reforming of Ethanol

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Author(s):
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]
Total Authors: 6
Affiliation:
[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
Total Affiliations: 5
Document type: Journal article
Source: CHEMISTRYSELECT; v. 6, n. 41, p. 11188-11197, NOV 8 2021.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 17/10966-0 - Impact of the support of nanostructured catalysts in the hydrodeoxygenation reaction of bio-oil
Grantee:Karen Abreu Resende
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 18/01258-5 - Novel chemical catalytic and photocatalytic processes for the direct conversion of methane and CO2 to products
Grantee:José Maria Correa Bueno
Support Opportunities: Research Projects - Thematic Grants