1. Department of Physics Free University Berlin Arnimallee 14 14195 Berlin Germany
2. Department of Interface Science Fritz Haber Institute of the Max Planck Society 14195 Berlin Germany
3. Department of Chemistry University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
4. Institute for Solar Fuels Helmholtz‐Zentrum Berlin für Materialien und Energie GmbH Hahn‐Meitner‐Platz‐1 14109 Berlin Germany
5. Institute of Fundamental Technological Research Polish Academy of Science Pawińskiego St. 5b Warsaw 02‐106 Poland