1. Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technical University of Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany
2. Group for Synthesis and Characterization of Innovative Materials, Department of Chemistry, Technical University of Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany
3. Department of Chemistry, School of Science and Engineering, The American University in Cairo, 11835 Cairo, Egypt