Publication
Liquid-phase hydrogenation of unsaturated aldehydes: enhancing selectivity of multiwalled carbon nanotube- supported catalysts by thermal activation
| dc.contributor.author | Machado, Bruno | |
| dc.contributor.author | Gomes, Helder | |
| dc.contributor.author | Serp, Philippe | |
| dc.contributor.author | Kalck, Philippe | |
| dc.contributor.author | Faria, Joaquim | |
| dc.date.accessioned | 2011-06-03T14:40:07Z | |
| dc.date.available | 2011-06-03T14:40:07Z | |
| dc.date.issued | 2010 | |
| dc.description.abstract | Platinum and iridium organometallic precursors are used to prepare nanosized, thermally stable multiwalled carbon nanotube- supported catalysts. The materials are characterized by N2 adsorption at 77 K, temperature-programmed desorption coupled with mass spectrometry, H2 chemisorption, transmission electron microscopy and thermogravimetric analysis; they are tested in the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol under mild conditions (363 K and 1 MPa). A thermal activation at 973 K is found to have a very positive effect over both activity and selectivity, leading to selectivities of approximately 70%, at 50% conversion, regardless of the active metal phase (Pt or Ir). Since no noticeable differences in the metal particle sizes are detected, the results are interpreted in light of an enhanced metal/support interaction. This effect, induced by the removal of oxygenated surface groups, is thought to change the adsorption mechanism of the cinnamaldehyde molecule. | por |
| dc.identifier.citation | Machado, Bruno; Gomes, Helder; Serp, Philippe; Kalck, Philippe; Faria, Joaquim (2010). Liquid phase hydrogenation of unsaturated aldehydes: enhancing selectivity of MWCNT supported catalysts by thermal activation. ChemCatChem. ISSN 1867-3880. 2, p.190-197 | por |
| dc.identifier.doi | 10.1002/cctc.200900230 | |
| dc.identifier.issn | 1867-3880 | |
| dc.identifier.uri | http://hdl.handle.net/10198/4991 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Wiley | por |
| dc.subject | Aldehydes | por |
| dc.subject | Hydrogenation | por |
| dc.subject | Nanotubes | por |
| dc.subject | Supported catalysts | por |
| dc.subject | Surface chemistry | por |
| dc.title | Liquid-phase hydrogenation of unsaturated aldehydes: enhancing selectivity of multiwalled carbon nanotube- supported catalysts by thermal activation | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 197 | por |
| oaire.citation.startPage | 190 | por |
| oaire.citation.title | ChemCatChem | por |
| person.familyName | Gomes | |
| person.givenName | Helder | |
| person.identifier.ciencia-id | 6218-1E19-13EE | |
| person.identifier.orcid | 0000-0001-6898-2408 | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 0eb96337-224a-4339-9918-334436fbbb99 | |
| relation.isAuthorOfPublication.latestForDiscovery | 0eb96337-224a-4339-9918-334436fbbb99 |