Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 72: Competition for the Gerhard Ertl Young Investigator Award
O 72.4: Vortrag
Donnerstag, 3. April 2014, 12:00–12:30, PHY C 213
PdZn and CuZn model catalysts for methanol steam reforming - Structure selectivity correlations obtained by in-situ surface spectroscopy and catalytic testing — •Christoph Rameshan1, Werner Stadlmayer2, Christian Weilach1, Harald Lorenz2, Michael Hävecker3, Raoul Blume3, Tulio Rocha3, Detre Teschner3, Axel Knop-Gericke3, Robert Schlögl3, Norbert Memmel2, Dmitry Zemlyanov4, Günther Rupprechter1, and Bernhard Klötzer2 — 1Institute of Materials Chemistry, Vienna University of Technology, Lehargasse 9, 1060 Wien — 2Institute of Physical Chemistry, University of Innsbruck, Innrain 52a, 6020 Innsbruck — 3Department of Inorganic Chemistry, Fritz-Haber-Institute of the Max-Planck_society, Faradayweg 4-6, 14195 Berlin — 4Brick Nanotechnology Centre, Purdue University, 1205 West State Street, West Lafayette, In 47907-2057, USA
Methanol Steam Reforming is a promissing reaction for the reneable Energy Scenario. The reaction must be carried out with a high selectivity, avoiding the undesired by-product CO, which poissons the fuell-cell electro catalyst. Apart from advanced copper based catalysts, reduced states of Pd/ZnO or Pd/Ga2O3 have been identified as promising candidates. This work was focused on PdZn and CuZn model catalysts and their activity and selectivity. Exact correlation between their catalyst structure and the catalytic performance were shown through synchrotron based in-situ ambient pressure XPS measurements. It could be shown that only a sufficient thick PdZn intermetallic phase with a corrugated surface (Zn out, Pd in) is an excellent catalyst.