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Inorganic Chemistry – Reactivity Group
  

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Annette Trunschke
 
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Highlights:
  Speciation of Molybdates under Hydrothermal Conditions

Johannes Noack, Frank Rosowski, Robert Schlögl, and Annette Trunschke

Zeitschrift für anorganische und allgemeine Chemie 2014, 640, 2730-2736.
DOI: 10.1002/zaac.201400439.

The speciation of molybdates under hydrothermal conditions differs significantly from the speciation under ambient conditions at comparable pH values basically due to the thermal stability of the species involved in the equilibria in aqueous solution. Different precursor species show differing reactivity with vanadyl sulfate resulting in the formation of mixed MoV oxides with either hexagonal or bronze-like structure.

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  How Strain Affects the Reactivity of Surface Metal Oxide Catalysts

Kazuhiko Amakawa, Lili Sun, Chunsheng Guo, Michael Ha¨vecker, Pierre Kube, Israel E. Wachs, Soe Lwin, Anatoly I. Frenkel, Anitha Patlolla, Klaus Hermann, Robert Schlögl, and Annette Trunschke

Angewandte Chemie, International Edition 2013, 52, 13553 –13557.
DOI: 10.1002/anie.201306620.

Only uncomfortable seats left: At high coverage where available anchoring surface hydroxyl sites are limited, surface metal oxide molecules are forced to be anchored in frustrated configurations, leading to an increased reactivity. The concept explains the sometimes observed non-linear coverage dependence in monolayer-type supported metal oxide catalysts.
 
Aiding the Self-Assembly of Supramolecular Polyoxometalates under Hydrothermal Conditions To Give Precursors of Complex Functional Oxides

Maricruz Sanchez Sanchez, Frank Girgsdies, Mateusz Jastak, Pierre Kube, Robert Schlögl, and Annette Trunschke

Angewandte Chemie, International Edition 2012, 51, 7194 –7197.
DOI: 10.1002/anie.201200746 and
10.1002/ange.201200746.

  • In-situ Raman spectroscopy allows insight into molecular processes under hydrothermal conditions during synthesis of technologically relevant, complex nano-structured MoVTeNb oxides.

  • Based on the knowledge acquired with respect to the complicated cross-linked reaction network of polyoxometalate intermediates, an innovative synthesis procedure was developed that directs the synthesis more efficiently towards the desired product with improved functionality.


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Oxygen Insertion Catalysis by sp2 Carbon

Benjamin Frank, Raoul Blume, Ali Rinaldi, Annette Trunschke, and Robert Schlögl

Angewandte Chemie, International Edition 2011, 50, 10226-10230.
DOI: 10.1002/anie.201103340.

  • Graphitic carbon catalyzes the insertion of O atoms into acrolein. Such complex multistep atom rearrangements were believed to be the exclusive domain of metal (oxide) catalysis.

  • In the C-catalyzed process, the nucleophilic O atoms terminating the graphite (0001) surface abstract the formyl H atom and the activated aldehyde is oxidized by a mobile epoxide O atom.

  • Thus, the sp2 carbon acts as a bifunctional catalyst.


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Group Highlights
  • November 2014
    Pierre Schwach received the doctoral degree at TU Berlin for his thesis “Oxidative activation of methane over MgO model catalysts”.


  • July 2014
    Klaus Friedel received the doctoral degree at TU Berlin for his thesis “Insights into the Acid-Base Properties of Functionalized Multiwall Carbon Nanotubes”.


  • July 2014
    Till Wolfram received the doctoral degree at TU Berlin for his thesis “Influence of the support on vanadium oxide catalysts for the selective oxidation of short-chain alkanes”.


  • June 2014
    Caroline Dessal successfully defended her Master Thesis entitled “Synthesis and characterization of SBA-15-supported V/Mo oxide catalysts” at the University Strasbourg .


  • April 2014
    Margherita Macino successfully defended her Master Thesis entitled “A study of mesoporous silica dissolution” at FU Berlin.


  • September 2013
    Klaus Friedel was awarded a poster prize for his poster entitled "Probing the basicity of nitrogen functionalized carbon nanotubes by TPD and catalytic decomposition of 2-propanol" at the 5th International Conference for Energy Storage / Conversion and Environment Protection (CESEP 2013) in Mühlheim a.d. Ruhr.


  • June 2013
    Kazuhiko Amakawa received the doctoral degree (summa cum laude) at TU Berlin for his thesis “Active Site for Propene Metathesis in Silica-Supported Molybdenum Oxide Catalysts“.


  • May 2012
    Maik Eichelbaum was awarded a poster prize for his poster entitled “Interaction of gas phase, surface and bulk electronic structure of oxidation catalysts studied by microwave cavity perturbation” at the Bunsentagung 17-19 May 2012 in Leipzig.


  • August 2011
    Tom Cotter received the doctoral degree at TU Berlin for his thesis “The reducibility of mixed Mo/V oxides to carbides and their reactivity in the activation of propane”.


  • August 2011
    Lénárd-István Csepei received the doctoral degree at TU Berlin for his thesis “Kinetic studies of propane oxidation on Mo and V based mixed oxide catalysts”.

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