1. Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
2. Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
3. Helmholtz-Zentrum Berlin GmbH, Helmholtz Institute Erlangen-Nürnberg, 14109 Berlin, Germany
4. Max Planck Institute for Iron Research, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
5. Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45413 Mülheim an der Ruhr, Germany
6. Department of Chemistry and Energy Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
7. Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
8. Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany