Metallic osmium and ruthenium nanoparticles for CO oxidation

Supported metallic catalysts were prepared from pyrolysis of the organometallic clusters RuOs3(CO)(13)(mu-H)(2), Os-3(CO)(10)(mu-AuPPh3)(2), Os-3(CO)(12), Ru-3(CO)(12) and [Ru(CO)(4)](n), on either silica or titania, and their catalytic performance for CO oxidation has been assessed against a supported catalyst prepared from RuCl3. Ruthenium catalysts prepared from organometallic precursors were found to exhibit better activity, and that supported on TiO2 exhibited activity at the lowest operating temperature. (C) 2009 Elsevier B.V. All rights reserved.