Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 73: Symposium: Bimetallic Nanosystems: Tuning Physical and Chemical Properties II (Invited Speakers: André Fielicke, Thomas Risse, Jürgen Behm)
O 73.4: Vortrag
Donnerstag, 28. Februar 2008, 15:30–15:45, MA 005
Specific Synthesis of Pt Nanowires for Catalytic Applications — •Daniela Fenske1,4, Holger Borchert2,4, Jan Kehres1,4, Joanna Kolny-Olesiak2,4, Marcus Bäumer3,4, and Katharina Al-Shamery1,4 — 1IRAC, University of Oldenburg, Germany — 2EHF, University of Oldenburg, Germany — 3IAPC, University of Bremen, Germany — 4Center of Interface Science (CIS), Germany
Metallic nanomaterials are of great interest in the last years due to their interesting properties as new materials for optical, electronic, magnetic or catalytic applications. Particularly size and morphology of such nanoparticulate systems offer also high potential for material improvement. A promising issue is the preparation of platinum nanowires by means of colloidal chemistry which allows obtaining particles with well-defined size and shape by use of stabilizing ligands.
Recent efforts have been focused on the development of synthesis based on Jana and Peng et.al. [1] to obtain these nanowires. Therefore we were able to prepare dodecylamine-capped Pt nanowires with 2 nm in diameter and several multiple in length in varying the synthesis conditions. The influence of temperature, stabilisers and reducing agents on the morphology has been investigated. The catalytic activity of such nanowires immobilized at different oxidic supports could also be demonstrated on the example of CO oxidation and will be compared to spherical Pt and bimetallic colloidal nanoparticles [2]. [1]: N. R. Jana, X. Peng, J. Am. Chem. Soc. 2003, 125, p.14280-14281 [2]: H. Borchert, D. Fenske, J. Kolny-Olesiak, J. Parisi, K. Al-Shamery, M. Bäumer, Angew. Chem. Int. Ed. 2007, 46, p.2923-2926