Catalytic performance of Au/ZnO nanocatalysts for CO oxidation

• Type: Article in International Scientific Journal
• Date: 2010

Authors

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

Journal

Title: Journal of Catalysis

Vol. 273 No. 2

Pages: 191-198

ISSN: 0021-9517

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 72 Citations

ISI Web of Science

Scopus - 85 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Physical sciences > Chemistry > Heterogeneous catalysis

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8