1. Laboratory of Nanochemistry for Energy (LNCE), Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL), Rue de l’Industrie 17, Sion 1950, Switzerland
2. The Swiss-Norwegian Beamlines, European Synchrotron Radiation Facility (ESRF), Grenoble 38000, France