1. Deutsches Zentrum für Luft- und Raumfahrt – DLR/German Aerospace Center, Institute of Future Fuels, Linder Höhe, 51147 Cologne, Germany
2. RWTH Aachen, Faculty of Mechanical Engineering, Chair for Solar Fuel Production, 52062 Aachen, Germany
3. ETH Zürich, Department of Mechanical and Process Engineering, Professorship of Renewable Energy Carriers, 8092 Zürich, Switzerland