CRC for Greenhouse Gas Technologies and Centre for Green Chemistry, School of Chemistry, Monash University, Victoria, 3800, Australia A series of microporous carbon adsorbents were synthesised with a view to enhancing their hydrogen adsorption capacity by the incorporation of uniform well dispersed metal nano-particles. The hydrogen storage properties were measured at liquid nitrogen and other temperatures. Structural features of the carbons were investigated by various methods including X-ray diffraction, high resolution transmission electron microscopy, prompt gamma neutron activation analysis and inelastic neturon scattering (INS). Hydrogen adsorption capacities (up to 3.5wt%) and isosteric heats of adsorption (up to 10.5kJ/mol) were not as high as desired; however some novel and unexpected adsorption properties were observed. An optimum metal loading of about 1wt% was observed - with both lower and higher loadings exhibiting reduced hydrogen adsorption capacities and reduced isosteric heats of adsorption. INS, which probes the hydrogen rotational transitions, shows peaks that develop with atypical simplicity as a function of hydrogen loading, suggesting that the sites on which hydrogen can adsorb are of a very uniform nature.