INSTRUMENTATION

The group operates state-of-the-art instruments and develops new experimental solutions to combine preparation of well-defined nanostructured model catalysts under ultra clean environments and investigation of their performance under technically-relevant operational conditions.

UHV MOLECULAR BEAM / IRAS APPARATUS

  • Vacuum-Fourier Transform Infrared Reflection Absorption spectrometer (FT-IRAS) for time resolved surface IR spectroscopy, Bruker Vertex 80v
  • Two modulated effusive beam sources, flux variation over 5 orders of magnitude
  • Pulsed / chopped supersonic molecular beam source
  • Fast ion-counting quadrupole triple-filter mass spectrometer (QMS) w. multichannel scaling
  • Ambient pressure cell for reactor studies equipped with GC analytics
  • Various preparation and characterization techniques for model surfaces: metal evaporators for physical vapour deposition, TPD, LEED, AES, etc.
  • Evaporator of large organic molecules for surface functionalization
  • Vacuum sample transfer system

“Molecular Beam/ Infrared Reflection-Absorption Spectroscopy Apparatus for Probing Heterogeneously-Catalyzed Reactions on Functionalized and Nanostructured Model Surfaces” S. Attia et al,  Rev.Sci. Inst, 90, (2019), 053903

Figure_IRAS_1

 

 

Figure_IRAS_2

STM APPARATUS

  • Variable Temperature (90 – 350 K) STM unit Aarhus design, SPECS
  • Fast ion-counting quadrupole triple-filter mass spectrometer (QMS) w. multichannel scaling
  • Ambient pressure cell
  • Various preparation and characterization techniques for model surfaces: two metal evaporators for physical vapour deposition, evaporator of alkali metals, TPD, LEED, AES, etc.
  • Evaporator of large organic molecules for surface functionalization
  • Vacuum sample transfer system

Figure_STM_1

 

Figure_STM_2

UHV MOLECULAR BEAM / POLARISATION-MODULATION (PM-) IRAS APPARATUS

  • Vacuum-Fourier Transform Infrared Reflection Absorption spectrometer (FT-IRAS) for time resolved surface IR spectroscopy (Bruker Vertex 80v) equipped with a polarization-modulation unit for surface-sensitive IRAS under ambient pressure conditions.
  • Two modulated effusive beam sources, flux variation over 5 orders of magnitude
  • Fast ion-counting quadrupole triple-filter mass spectrometer (QMS) w. multichannel scaling
  • Ambient pressure cell for polarization-dependent IRAS and reactor studies
  • Various preparation and characterization techniques for model surfaces: metal evaporators for physical vapour deposition, TPD, LEED, AES, etc.
  • Evaporator of large organic molecules for surface functionalization
  • Vacuum sample transfer system

Figure PM-IRAS

 

SINGLE CRYSTAL ADSORPTION CALORIMETER

  • Single Crystal Adsorption Calorimeter (SCAC) with pyroelectric detector, allowing for direct isothermal calorimetric measurements in the temperature range 90-320 K.
  • modulated effusive beam source, flux variation over 5 orders of magnitude
  • Fast ion-counting quadrupole triple-filter mass spectrometer (QMS) w. multichannel scaling
  • Various preparation and characterization techniques for model surfaces: metal evaporators for physical vapour deposition, TPD, LEED, AES, etc.
  • Evaporator of large organic molecules for surface functionalization
  • Vacuum sample transfer system

“An improved single crystal adsorption calorimeter for determining gas adsorption and reaction energies on complex model catalysts “ J.-H. Fischer et al, Rev. Sci. Inst., 82 (2011) 024102

Figure_MCAl