Platinum supported on TiO2 as a new selective catalyst on heterogeneous hydrogenation of alpha,beta-unsaturated oxosteroids

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

Authors

Rui M. D. Nunes (Author) Other; Bruno F. Machado (Author) FEUP; Mariette M. Pereira (Author) Other; Maria José S. M. Moreno (Author) Other; Joaquim L. Faria (Author) FEUP

Journal

Title: Journal of Molecular Catalysis A: Chemical

Vol. 333 No. 1-2

Pages: 1-5

ISSN: 1381-1169

Publisher: Elsevier B.V.

Indexing

ISI Web of Knowledge - 7 Citations

ISI Web of Science

Scopus - 7 Citations

COMPENDEX

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-003-0NC

DOI: 10.1016/j.molcata.2010.09.019

Abstract (EN): This paper describes the photochemical deposition of platinum onto TiO2 surface and the full characterization of the catalysts using BET, XPS and TEM techniques. The 1 and 3 wt.% Pt/TiO2 catalysts reveal high activity with 70% and 96% of alpha-diastereoselectivity in the hydrogenation of the carbon-carbon double bond of the alpha,beta-unsaturated oxosteroids 4-androstene-3,17-dione, and 3 beta-acetoxypregna-5,16-dien-20-one, respectively. Using higher temperature and pressure, the catalysts promote the further reduction of C-3 carbonyl group. Catalyst recovering and recycling is easily achieved with no appreciable lost of catalytic activity after five subsequent runs.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5