1. The Electrochemical Energy, Catalysis, and Materials Science Laboratory, Department of Chemistry, Chemical Engineering Division, Technical University Berlin, Straße des 17 Juni 124, 10623 Berlin, Germany
2. Center for Electron Microscopy (ZELMI), Technical University Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
3. Department of Chemistry/Functional Materials, Technical University Berlin, Hardenbergstraße 40, 10623 Berlin, Germany
4. Institute of Engineering Thermodynamics, German Aerospace Center, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany