1. Institute
of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
2. Laboratory
of Industrial Chemistry, Ruhr-University Bochum, 44780 Bochum, Germany
3. Center
for Automotive Catalytic Systems Aachen, RWTH Aachen University, Aachen, Germany
4. Institute
for Combustion Technology, RWTH Aachen University, Templergraben 64, 52056 Aachen, Germany
5. Ernst
Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany