Revealing contribution of pore size to high hydrogen storage capacity

摘要: Abstract Understanding the influence of pore structure on hydrogen storage behaviour is fundamental to develop high-performance adsorbents. Nevertheless, there are rare compellent evidences clearly clarify relationship between size and performance in porous materials. The main reason could be ascribed lack appropriate model structures. Herein, we propose an interesting convincing insight into aforementioned important issue by designing proper well-defined three types carbon materials with different distributions. Except for distribution, these carbons derived from same source (i.e., chitosan), have very similar surface area ca. 3300 m2 g−1, grain morphology microcrystalline framework structure. With features, obtained can adopted as objects evaluate correlation performance. It demonstrated that presence nanopore 1.5 2.5 nm significantly improve high-pressure capacity. Moreover, nanopores below 1.5 nm indeed most efficient spaces no matter at low pressures or high pressures, whereas those mesopores above believed not participate storage. These results convincingly indicate exists a strong contribution