[Zurück]

Ch. Rameshan, W. Stadlmayr, C Weilach, H. Lorenz, M. Hävecker, R. Blume, T. Rocha, D. Teschner, A. Knop-Gericke, R. Schlögl, N. Memmel, D. Zemlyanov, G. Rupprechter, B. Klötzer:
"PdZn and CuZn model catalysts for methanol steam reforming - Structure selectivity correlations obtained by in-situ surface spectroscopy and catalytic testing";
Vortrag: DPG Frühjahrstagung 2014, Dresden, Germany; 30.03.2014 - 04.04.2014; in: "DPG-Frühjahrstagung der Sektion Kondensierte Materie", Deutsche Physikalische Gesellschaft e.V., Bad Honnef (2014), S. 1.

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.

in-situ XPS, catalysis, structure, selectivity