[1] Ludwig Maximilians Univ Munchen, Dept Chem, Butenandtstr 5-13 E, D-81377 Munich, Germany
[2] Ludwig Maximilians Univ Munchen, Ctr NanoSci CeNS, Butenandtstr 5-13 E, D-81377 Munich, Germany
[3] Forschungszentrum Julich, Inst Energy & Climate Res IEK Mat Synth & Proc 1, Wilhelm Johnen Str, D-52425 Julich, Germany
[4] Univ Duisburg Essen, Fac Engn, Lotharstr 1, D-47057 Duisburg, Germany
[5] Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CENIDE, Lotharstr 1, D-47057 Duisburg, Germany
[6] Heraeus Deutschland GmbH & Co KG, Heraeusstr 12-14, D-63450 Hanau, Germany
[7] Tech Univ Munich, Dept Chem, Chair Tech Electrochem, D-85748 Garching, Germany
[8] Tech Univ Munich, Catalysis Res Ctr, D-85748 Garching, Germany