Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2397
Title: Supercritical deposition of Pt on SnO2-coated Al2O3 foams: Phase behaviour and catalytic performance
Authors: Garrido, G. Incera
Patcas, F. C.
Upper, G.
Türk, M.
Yılmaz, Selahattin
Kraushaar-Czarnetzki, B.
Keywords: Ceramic foams
CO oxidation
Nanoparticles
Platinum
Supercritical fluid
Issue Date: Apr-2008
Publisher: Elsevier Ltd.
Source: Garrido, G. I., Patcas, F. C., Upper, G., Türk, M., Yılmaz, S., and Kraushaar-Czarnetzki, B. (2008). Supercritical deposition of Pt on SnO2-coated Al2O3 foams: Phase behaviour and catalytic performance. Applied Catalysis A: General, 338(1-2), 58-65. doi:10.1016/j.apcata.2007.12.019
Abstract: Deposition and reduction of an organometallic platinum complex from a supercritical Pt(COD)Me2/CO2 solution was carried out to produce Pt/SnO2 catalysts supported on Al2O3 foams for CO oxidation at moderate temperatures. The phase behaviour of the complex in supercritical carbon dioxide was investigated to find the optimum pressure and temperature conditions for the deposition. For the Pt(COD)Me2/CO2 mixture, the melting point decreased with increasing pressure from 378 K at 0.1 MPa to 360 K at 25.6 MPa. Additional investigations showed that the solubility of Pt(COD)Me2 in CO2 increases from 5.9 × 10-4 mol/mol at 11.2 MPa and 313 K to 3.4 × 10-3 mol/mol at 29.6 MPa and 353 K. The supercritical deposition yielded catalysts with highly dispersed platinum nanoparticles of approx. 3 nm having a narrow size distribution and thus, a superior activity towards oxidation of carbon monoxide in comparison to a catalyst prepared by the conventional aqueous impregnation of Pt.
URI: http://doi.org/10.1016/j.apcata.2007.12.019
http://hdl.handle.net/11147/2397
ISSN: 0926-860X
0926-860X
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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