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In situ deposition of Pd nanoparticles with controllable diameters in hollow carbon spheres for hydrogen storage |
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| Authors: | Karolina Wenelska Beata Michalkiewicz Jiang Gong Tao Tang Ryszard Kaleńczuk Xuecheng Chen Ewa Mijowska |
| Affiliation: | 1. Institute of Chemical and Environment Engineering, West Pomeranian University of Technology, ul. Pulaskiego 10, 70-322 Szczecin, Poland;2. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Remin Road 5625, Changchun 130022, China |
| Abstract: | A novel in situ synthesis of Pd nanoparticles supported in hollow carbon spheres (HCS) is reported. The size of the nanoparticles can be tuned via application of different Pd precursors. The hydrogen storage properties of Pd supported in HCS under room temperature were examined at partial pressures. We observed significant difference between the storage capacities of two samples containing Pd nanoparticles with different diameter distributions. The results showed that the sample with suitable diameters of Pd nanoparticles was more favorable for the H2 storage, even lower mass of Pd was used. The maximum hydrogen storage of 0.36 wt % exhibited the sample with Pd nanoparticles with the diameter of 11 nm (measured at 298 K and 24 bar) and it was enhanced by the factor of two in respect to the pristine HCS. The enhanced storage capacity is due to cumulative hydrogen adsorption by HCS and Pd nanoparticles. We also propose the mechanism of hydrogen storage in our material. |
| Keywords: | Hydrogen storage Hollow carbon spheres Palladium Nanoparticle |
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