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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.)

Correlation between Structural and Catalytic Properties of Copper Supported on Porous Alumina for the Ethanol Dehydrogenation Reaction

Full text
Author(s):
Cassinelli, Wellington H. [1] ; Martins, Leandro [1] ; Passos, Aline R. [2, 1] ; Pulcinelli, Sandra H. [1] ; Rochet, Amelie [2, 1] ; Briois, Valerie [2] ; Santilli, Celso V. [1]
Total Authors: 7
Affiliation:
[1] Univ Estadual Paulista UNESP, Inst Quim, BR-14800060 Araraquara, SP - Brazil
[2] Synchrotron SOLEIL, F-91192 Gif Sur Yvette - France
Total Affiliations: 2
Document type: Journal article
Source: CHEMCATCHEM; v. 7, n. 11, p. 1668-1677, JUN 1 2015.
Web of Science Citations: 13
Abstract

Structural and surface features of highly dispersed copper catalysts supported on hierarchical porous alumina were evaluated for the ethanol dehydrogenation reaction. The catalysts were prepared by incipient wetness impregnation of alumina obtained by a dual template sol-gel procedure. Structural characterizations provided evidence that the copper was highly dispersed on the alumina in the form of monomeric octahedral Cu2+ species adsorbed into an incomplete layer. A two-step reduction was observed for the catalysts in a temperature range of 50-250 degrees C under H-2/He flow. The temperature for onset of reduction and the percentage of Cu+ species formed upon activation were dependent on the Cu loading. At lower Cu loadings, the amount of Cu+ increased, leading to a slower and less complete reduction. Based on the apparent activation energy and turnover frequency, it could be concluded that Cu+ containing a mixture of Cu+/Cu-0 results in a more efficient catalyst than Cu-0 for the ethanol dehydrogenation reaction. (AU)

FAPESP's process: 07/53073-4 - Mesoporous ceramics and multifunctional organic-inorganic hybrids prepared by sol-gel process
Grantee:Celso Valentim Santilli
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 10/01449-3 - Development of porous heterogeneous catalysts for the conversion of renewable feedstocks
Grantee:Leandro Pierroni Martins
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 13/05346-2 - E-MRS 2013 Spring Meeting
Grantee:Wellington Henrique Cassinelli
Support Opportunities: Research Grants - Meeting - Abroad