Realising a sustainable hydrogen economy requires breakthroughs in the production and storage of hydrogen. Focussing on research areas that have been singled out as areas that might see such breakthroughs, the network aims to devise a tandem cell which can photoelectrochemically convert solar energy to energy in hydrogen with an efficiency greater than 10%, and to find the best possible complex-metal hydride hydrogen storage system for on-board storage in automobiles. Because the best materials devised sofar for both photoelectrochemical hydrogen production and storage in complex metal hydrides are nanocrystalline with large surface-to-volume ratio, a mixed theoretical/experimental, academic/industrial, physics/chemistry team has been constructed which has the maximum chance to achieve these goals, by taking a concerted nanoscience/surface science approach to both production and storage of hydrogen. Such a concerted effort can only be achieved in the framework of a Research Training Network bringing together leading experts in these contributing, complementary areas.