1. Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
2. Centre for Energy Research, Institute of Technical Physics and Materials Science, Konkoly-Thege M. str. 29-33, 1121 Budapest, Hungary
3. Cluster of Excellence PhoenixD (Photonics, Optics and Engineering − Innovation Across Disciplines), Leibniz Universität Hannover, 30167 Hanover, Germany