Solar Hydrogen Reaching Maturity Jan Rongé, Tom Bosserez, Louis Huguenin, Mikaël Dumortier, Sophia Haussener and Johan A. Martens Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles, 70 5 (2015) 863-876 Published online: 14 April 2015 DOI: 10.2516/ogst/2014061