1. Institute of Electrochemistry, Clausthal University of Technology, Arnold Sommerfeld Str. 6, D-38678, Clausthal-Zellerfeld, Germany.
2. Department of Solar Energy and Environmental Physics, Swiss Institute for Dryland Environmental and Energy Research, Blaustein Institutes for Desert Research (BIDR), Ben-Gurion University of the Negev, Midreshet Ben-Gurion 8499000, Israel.
3. Department of Physics, Ben-Gurion University of the Negev, Be’er Sheva 8410501, Israel.
4. Institute of Inorganic Chemistry, Technische Universität Bergakademie Freiberg, D-09599 Freiberg, Germany.