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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.)

Palladium decoration of hybrid carbon nanotubes/charcoal composite and its catalytic behavior in the hydrogenation of trans-cinnamaldehyde

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Author(s):
Zana Ribeiro, Pedro Henrique [1] ; Matsubara, Elaine Y. [1] ; Rosolen, Jose Mauricio [1] ; Donate, Paulo Marcos [1] ; Gunnella, Roberto [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL; v. 410, p. 34-40, DEC 15 2015.
Web of Science Citations: 11
Abstract

In the present study, we addressed the palladium (Pd) decoration of multiwalled carbon nanotube (CNT)/activated carbon (AC) hybrid composites (MWCNT/AC), and examined the catalytic behavior of the composites in the hydrogenation of trans-cinnamaldehyde. The MWCNT/AC composites were prepared by growing CNT network on the surface of AC granules, using the chemical vapor deposition method. XPS analysis revealed that the MWCNT/AC and COOH-MWCNT/AC composites and isolated AC adsorbed Pd at different oxidation states when dipped into a Pd-0 microemulsion: isolated AC and the COOH-MWCNT/AC composite adsorbed Pd nanoparticles at di- and tetravalent states (Pd2+/4+), while the MWCNT/AC composite adsorbed Pd nanoparticles at zero and tetravalent states (Pd-0/Pd4+). The MWCNT/AC composite may thereby have hierarchical Pd adsorption properties dependent on the MWCNT network type grown onto the AC surface. Regarding the catalytic performance, the (Pe(0/4+))-MWCNT/AC catalyst displayed higher selectivity to hydrocinnamaldehyde formation (95.9%) when compared with the (Pd2+/4+)-AC and (Pd2+/4+)-00OH-MWCNT/AC catalysts (72.1% and 91.4% selectivity, respectively). The catalytic performance of the (Pd0/4+)-MWCNT/AC catalyst with 2.8 wt% of Pd loading was also superior than the catalytic performance of commercial catalysts with 5 and 10 wt% of Pd loading and other Pd/CNTs catalysts reported in the literature. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 10/07681-5 - Development and study of micro/nanostructurated materials of interest for Lithium ion battery and capacitors
Grantee:Jose Mauricio Rosolen
Support Opportunities: Regular Research Grants
FAPESP's process: 13/18254-9 - Multicomponent processes to synthesize new compounds of pharmacological interest
Grantee:Paulo Marcos Donate
Support Opportunities: Regular Research Grants