Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/1320
Título: Pt nanoparticles supported over Ce-Ti-O: the solvothermal and photochemical approaches for the preparation of catalytic materials
Autor: Silva, Adrián
Machado, Bruno
Gomes, Helder
Figueiredo, José
Drazic, Goran
Faria, Joaquim
Palavras-chave: Nanocatalysts
Solvothermolysis
Photodeposition
Platinum, cerium and titanium
Hydrogenation
Cinnamaldehyde
Data: 2010
Editora: Springer
Citação: Silva, Adrián; Machado, Bruno; Gomes, Helder; Figueiredo, José; Drazic, Goran; Faria, Joaquim (2010) - Pt nanoparticles supported over Ce-Ti-O: the solvothermal and photochemical approaches for the preparation of catalytic materials. Journal of Nanoparticle Research. ISSN 1572-896X. 12:1, p. 121-133
Resumo: Ce–Ti–O supports with different Ce/Ti molar ratios were synthesized by the solvothermal method using hexadecyltrimethylammonium bromide. Pt nanoparticles were then supported by photochemical deposition. The shape, size, and structure of these materials were analyzed by high resolution transmission electron microscopy. The single CeO2 support was also prepared, consisting of agglomerated cubic particles ranging from *3 to 8 nm. When titania was combined with ceria, a nanostructured architecture was produced, evidencing the strong influence of Ti in the support structure. Photodeposition of Pt nanoparticles is more efficient on Ce–Ti–O supports than in pristine CeO2. Crystalline Pt nanoparticles (mainly of *2 to 4 nm) were detected. The catalytic properties of the materials were tested in the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol. It was observed that Pt supported on Ce–Ti–O is more active and selective than Pt on CeO2 or TiO2 separately. The catalyst with 40 mol% Ce leads to total conversion of cinnamaldehyde in a few minutes; however, higher selectivity toward the desired product (cinnamyl alcohol) was obtained with higher amounts of Ce (50 mol%).
URI: http://hdl.handle.net/10198/1320
ISSN: 1572-896X
Versão do Editor: http://www.springerlink.com/content/103348/?p=3175505370cd4946a46c0c656c6a1f5aπ=0
Aparece nas colecções:DTQB - Artigos em Revistas Indexados ao ISI/Scopus

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