Hydrogen adsorption in zeolite-templated carbon decorated with metal nanoparticles prepared by using metallocene as a metal source

摘要

Hydrogen-powered fuel-cell vehicle is expected as one of the key technologies that realize sustainable development of human beings. For the fuel-cell vehicles, it is desired to develop hydrogen-storage materials which can be embedded in a high-pressure tank and be used around ambient temperature. We have previously demonstrated that zeolite-templated carbon (ZTC), which is an ordered microporous carbon having a high surface area (>3000 m /g), shows a high hydrogen storage amount (2.2 wt% at 30 °C under 34 MPa) as physisorption-based storage materials. However, this value still does not achieve a target of practical use (ca. 6 wt%). It is known that metal doping, such as Pt, Pd, Ru, and Ni, could be an effective way to enhance hydrogen uptake through a spillover mechanism. In this work, ZTC is decorated with metal nanoparticles (Ni and Fe) using metallocenes as precursors, and hydrogen uptake on the metal-doped ZTCs is examined.