Catalytic performance of Au/ZnO nanocatalysts for CO oxidation

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

Autores

S. A. C. Carabineiro (Autor) FEUP; B. F. Machado (Autor) FEUP; R. R. Bacsa (Autor) Outra; P. Serp (Autor) Outra; G. Drazic (Autor) Outra; J. L. Faria (Autor) FEUP; J. L. Figueiredo (Autor) FEUP

Revista

Título: Journal of Catalysis

Vol. 273 Nº 2

Páginas: 191-198

ISSN: 0021-9517

Editora: Elsevier

Indexação

ISI Web of Knowledge - 72 Citações

ISI Web of Science

Scopus - 85 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Físicas > Química > Catálise heterogénea

Outras Informações

ID Authenticus: P-003-4QA

DOI: 10.1016/j.jcat.2010.05.011

Abstract (EN): Au was loaded (1% wt.) on three different ZnO supports, by three different methods: photodeposition, double impregnation and ultrasonication. Two commercial ZnO supports were used, along with a ZnO. sample consisting of nanosized single crystals prepared by chemical vapour deposition. The samples were extensively characterised by various techniques. CO oxidation was used as a test reaction to compare the catalytic activity. The best results were obtained with ZnO prepared by chemical vapour deposition with Au loaded by ultrasonication that showed an activity of 2 mol(co) g(Au)(-1) h(-1) at room temperature. High-resolution electron microscopy images of the sample showed a number of gold nanocrystals epitaxially oriented on the ZnO rod. The unique catalyst-substrate interaction can be related to the increased catalytic activity of this sample, which was not observed for any of the others.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8