Promotional effect of Cu on the structure and chloronitrobenzene hydrogenation performance of carbon nanotube and activated carbon supported Pt catalysts

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

N. Mahata (Autor) Outra; O.S.G.P. Soares (Autor) FEUP; I. Rodríguez-Ramos (Autor) Outra; Manuel Fernando R Pereira (Autor) FEUP; José Melo Orfão (Autor) FEUP; José Luís Figueiredo (Autor) FEUP

Revista

Título: Applied Catalysis A: General

Vol. 464

Páginas: 28-34

ISSN: 0926-860X

Editora: Elsevier

Indexação

ISI Web of Knowledge - 17 Citações

ISI Web of Science

Scopus - 25 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-006-86Q

DOI: 10.1016/j.apcata.2013.05.018

Abstract (EN): The promotional effect of Cu on the performance of supported Pt catalysts in the selective hydrogenation of ortho- and para-chloronitrobenzene was studied at unprecedented large substrate/Pt molar ratio (20,000) using carbon nanotubes and activated carbon as supports. The catalysts were characterized by N-2 adsorption at -196 degrees C, H-2 chemisorption, TEM, TPR and XPS in order to correlate the corresponding properties with catalytic performance. Strong interactions between Pt and Cu result in partial coverage of the Pt surface by Cu. It is suggested that the superficial Cu species activate the N=O bond of chloronitrobenzene and also inhibit the adsorption of the desired product chloroaniline. Thus, the bimetallic catalysts exhibited excellent performance in producing selectively chloroanilines (>99%), in comparison to monometallic catalysts (91-98%). Moreover, the stability was much improved in comparison to the monometallic catalyst.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7