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A versatile sonication-assisted deposition-reduction method for preparing supported metal catalysts for catalytic applications.
- Source :
-
Ultrasonics sonochemistry [Ultrason Sonochem] 2017 Mar; Vol. 35 (Pt B), pp. 631-639. Date of Electronic Publication: 2016 Jan 18. - Publication Year :
- 2017
-
Abstract
- This work aims to develop a rapid and efficient strategy for preparing supported metal catalysts for catalytic applications. The sonication-assisted reduction-precipitation method was employed to prepare the heterogeneous mono- and bi-metallic catalysts for photocatalytic degradation of methyl orange (MO) and preferential oxidation (PROX) of CO in H <subscript>2</subscript> -rich gas. In general, there are three advantages for the sonication-assisted method as compared with the conventional methods, including high dispersion of metal nanoparticles on the catalyst support, the much higher deposition efficiency (DE) than those of the deposition-precipitation (DP) and co-precipitation (CP) methods, and the very fast preparation, which only lasts 10-20s for the deposition. In the AuPd/TiO <subscript>2</subscript> catalysts series, the AuPd(3:1)/TiO <subscript>2</subscript> catalyst is the most active for MO photocatalytic degradation; while for PROX reaction, Ru/TiO <subscript>2</subscript> , Au-Cu/SBA-15 and Pt/γ-Al <subscript>2</subscript> O <subscript>3</subscript> catalysts are very active, and the last one showed high stability in the lifetime test. The structural characterization revealed that in the AuPd(3:1)/TiO <subscript>2</subscript> catalyst, Au-Pd alloy particles were formed and a high percentage of Au atoms was located at the surface. Therefore, this sonication-assisted method is efficient and rapid in the preparation of supported metal catalysts with obvious structural characteristics for various catalytic applications.<br /> (Copyright © 2016 Elsevier B.V. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1873-2828
- Volume :
- 35
- Issue :
- Pt B
- Database :
- MEDLINE
- Journal :
- Ultrasonics sonochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 26809489
- Full Text :
- https://doi.org/10.1016/j.ultsonch.2016.01.018