Synergistic effect of bimetallic Au-Pd supported on ceria-zirconia mixed oxide catalysts for selective oxidation of glycerol

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Carol M. Olmos (Autor) Outra; Lidia E. Chinchilla (Autor) Outra; Elodie G. Rodrigues (Autor) Outra; Juan J. Delgado (Autor) Outra; Ana B. Hungría (Autor) Outra; Ginesa Blanco (Autor) Outra; Manuel F. R. Pereira (Autor) FEUP; José J. M. Orfão (Autor) FEUP; Jose J. Calvino (Autor) Outra; Xiaowei Chen (Autor) Outra

Revista

Título: Applied Catalysis B: Environmental

Vol. 197 Nº SI

Páginas: 222-235

ISSN: 0926-3373

Editora: Elsevier

Indexação

ISI Web of Knowledge - 31 Citações

Scopus - 54 Citações

Projetos Associados

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

LA 20 - PROJECTO ESTRATÉGICO - LA 20 - 2013-2014

Outras Informações

ID Authenticus: P-00K-VT3

DOI: 10.1016/j.apcatb.2016.03.050

Abstract (EN): A series of bimetallic Au-Pd catalysts supported on Ce0.62Zr0.38O2 mixed oxide has been synthesized using a simultaneous deposition-precipitation method. Different Au:Pd ratios were obtained maintaining Au loadings constant and varying Pd content. Elemental analysis, X-ray diffraction, N-2 physisorption, X-ray photoelectron spectroscopy, scanning transmission electron microscopy-high angle annular dark field (STEM-HAADF) and X-ray energy dispersive spectroscopy (XEDS) techniques have been employed to characterize these catalysts. The catalytic activities for selective oxidation of glycerol over these bimetallic catalysts have been evaluated, a synergistic effect being observed. Thus, the bimetallic Au-Pd catalyst with the lowest Pd content was the one exhibiting the highest catalytic activity among all the prepared catalysts. Oxidation at 700 degrees C of the bimetallic 2.2AuPd/Ce0.62Zr0.38O2 catalyst led to an increase of the catalytic activity for the selective oxidation of glycerol, which seemed to be due to the formation of a larger fraction of bimetallic Au-Pd alloy-type nanoparticles after oxidation at higher temperatures.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14