1. Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
2. Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
3. Institute of Physical Chemistry, RWTH Aachen University, 52074 Aachen, Germany
4. Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany