Hydrogen storage in nanoparticles works

Hydrogen is considered to be a clean storage and transport medium for energy. Therefore many future scenarios are based on the storage and transport of hydrogen. Various obstacles need to be overcome before this so-called hydrogen economy can be used on a large scale. One of these is the storage of hydrogen. A highly-promising method for storing hydrogen is its absorption in a metal hydride. A disadvantage of this method is that hydrogen uptake and release rates are low for metal hydrides. Reducing the particle size of the metal hydride to a nanometre scale is a possible solution to this problem.

Baldé demonstrated that 30 nanometre particles of sodium alanate store hydrogen in a highly efficient manner. With the addition of a titanium catalyst, a further reduction in the particle size to 20 nanometres is possible and this leads to an even more efficient storage of hydrogen. The deactivation process of the titanium catalyst was also studied because this inhibits the uptake and release rate of hydrogen. Structural characteristics that exert an influence on the catalyst's activity were found. This knowledge can be used to develop an improved catalyst.

This project was carried out within the Sustainable Hydrogen programme of ACTS (Advanced chemicals Technology for Sustainability) under the leadership of Prof. K. de Jong and Prof. F. Habraken. ACTS is the public-private partnership within NWO in the area of sustainable chemistry and catalysis. Together with the Division for Chemical Sciences, ACTS forms the contact point for chemistry and chemical engineering related grant applications in combination with life sciences and physics.