[1] Forschungszentrum Julich, Inst Energy & Climate Res Fundamental Electrochem, D-52425 Julich, Germany
[2] Rhein Westfal TH Aachen, Inst Phys Chem, D-52074 Aachen, Germany
[3] Rhein Westfal TH Aachen, Inst Inorgan Chem, D-52074 Aachen, Germany
[4] Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52425 Julich, Germany