1. Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen-PSI, Switzerland
2. Physical Chemistry, Technical University Dresden, 01062 Dresden, Germany
3. Laboratory for Synchrotron Radiation and Femtochemistry, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
4. Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
5. Laboratory of Physical Chemistry, ETH Zurich, 8093 Zurich, Switzerland