Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5147194 | International Journal of Hydrogen Energy | 2016 | 8 Pages |
Abstract
One of the most interesting strategies for improving hydrogen storage capacity at room temperature in porous solids is the inclusion of catalytically-active metal nanoparticles to provide the spillover effect in MOF materials. However, there is a great controversy in the adsorption literature about this topic due to the low reproducibility of results and the lack of knowledge about this mechanism. In the present work, 5-9Â nm Pd nanoparticles were homogeneously dispersed in a ZIF-8 material by a simultaneous liquid impregnation and chemical reduction with hydrazine. After verifying the structural and textural properties, the so obtained Pd/ZIF-8 material was tested in H2 and D2 adsorption-desorption analysis in order to determine its final hydrogen adsorption properties as well as to understand the involved mechanism in the hydrogen retention over the sample. Pd/ZIF-8 material showed a completely reversible hydrogen storage capacity at room temperature 30% higher than that of the pristine ZIF-8, being only 3% related to PdH0.18 formation. These results provide a better knowledge of the hydrogen retention mechanism by spillover in Pd-doped MOF materials, being useful in the designing of new materials for hydrogen storage at room temperature.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Jose A. Villajos, Gisela Orcajo, Guillermo Calleja, Juan Angel Botas, Carmen Martos,