Pt nanoparticles supported over Ce-Ti-O: the solvothermal and photochemical approaches for the preparation of catalytic materials

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Adrián M. T. Silva (Autor) FEUP; Bruno F. Machado (Autor) FEUP; Helder T. Gomes (Autor) Outra; José L. Figueiredo (Autor) FEUP; Goran Drazic (Autor) Outra; Joaquim L. Faria (Autor) FEUP

Revista

Título: Journal of Nanoparticle Research

Vol. 12 Nº 1

Páginas: 121-133

ISSN: 1388-0764

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 13 Citações

ISI Web of Science

Scopus - 15 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-003-BQ5

DOI: 10.1007/s11051-009-9584-3

Abstract (EN): 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 CeO(2) support was also prepared, consisting of agglomerated cubic particles ranging from similar to 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 CeO(2). Crystalline Pt nanoparticles (mainly of similar to 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 CeO(2) or TiO(2) 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%).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13