| Publication Type |
Journal Article |
| Title |
Influence of the pretreatment conditions on the development and performance of active sites of Pt/TiO2 catalysts used for the selective citral hydrogenation |
| Authors |
Esther Bailón-García Francisco Carrasco-Marin Agustin Francisco Perez-Cadenas Francisco J. Maldonado-Hodar |
| Groups |
|
| Journal |
JOURNAL OF CATALYSIS |
| Year |
2015 |
| Month |
July |
| Volume |
327 |
| Number |
|
| Pages |
86-95 |
| Abstract |
The influence of pretreatment conditions of Pt/TiO2 catalysts was analyzed by different techniques and changes in the textural and chemical properties correlated with the catalytic performance in citral hydrogenation. After H-2 pretreatment, the formation of two-dimensional Pt nanoparticles and oxygen vacancies favors the diffusion of Pt species into the TiO2 structure, while three-dimensional Pt crystallites are formed after He pretreatment. The coupled effect of Pt 2-D nanoparticles and oxygen vacancies strongly enhances the catalytic activity and the selective hydrogenation of citral to unsaturated alcohols by favoring the citral adsorption on the reduced surface through the terminal C=O groups in an environment rich in hydrogen provided by the highly dispersed Pt nanoparticles. These coupled metal-vacancy active sites are formed also after a combined He/H-2 pretreatment; nevertheless, the formation of three-dimensional Pt particles during the previous He treatment strongly reduce the extent of TiO2-Pt interface and consequently the surface site concentration and the catalytic activity. (C) 2015 Elsevier Inc. All rights reserved. |
| DOI |
http://dx.doi.org/10.1016/j.jcat.2015.04.019 |
| ISBN |
|
| Publisher |
|
| Book Title |
|
| ISSN |
0021-9517 |
| EISSN |
1090-2694 |
| Conference Name |
|
| Bibtex ID |
ISI:000356739400010 |
| Observations |
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