1. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin, Germany.
2. SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
3. Division Solar Energy Research, Elektronenspeicherring BESSY II, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.
4. Süd-Chemie AG, Research and Development Catalysts, Waldheimer Straße 13, 83052 Bruckmühl, Germany.
5. Institute for Complex Magnetic Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany.
6. Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA.