1. Laboratory of Nanochemistry for Energy (LNCE), Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne, Sion CH-1950, Switzerland
2. XMaS beamline, United Kingdom CRG, European Synchrotron Radiation Facility, 71, avenue des Martyrs, CS 40220, Grenoble Cedex 9 38043, France