Reactivity and Sintering of Size- and Composition-Selected Clusters on Supports (A02)

• Subject Area: Physical Chemistry of Solids and Surfaces, Material Characterisation ; Physical Chemistry of Molecules, Liquids and Interfaces, Biophysical Chemistry
• Term: since 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 426888090

For better mechanistic understanding of atomic scale reaction mechanisms, we will apply mass-selective ion deposition of Ptx=1-80, Pdy=1-150 and PtxPdy onto oxide supports (CeO2, patterned graphene/CeO2, Si/SiO2, TiO2 and Al2O3). The clusters’ structural changes, size dispersion, sintering, reactivity and catalytic activity will be tracked under conditions approaching those of engine exhaust catalysis. Local probe (STM) and ensemble averaging (XPS, TDS, FT-IR, NAP-XPS) surface characterization will be correlated with MS-based probes of reactivity to study CO and NO oxidation, NO reduction by CO and CH4 oxidation.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1441: Tracking the active site in heterogeneous catalysis for emission control (TrackAct)
• Major Instrumentation: Vacuum compnents + mass filter electronics
• Applicant Institution: Karlsruher Institut für Technologie
• Project Heads: Professor Dr. Manfred Kappes; Professorin Dr. Barbara Lechner