1. Institute of Materials Physics, University of Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen, Germany
2. International Center for Advanced Studies of Energy Conversion (ICASEC), University of Goettingen, D-37077 Goettingen, Germany
3. Young Investigator Group Oxygen Evolution Mechanism Engineering, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin, Germany