首页|Room-temperature hydrogen adsorption in Pd nanoparticle decorated UiO-66-NH2 via spillover
Room-temperature hydrogen adsorption in Pd nanoparticle decorated UiO-66-NH2 via spillover
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To improve room-temperature hydrogen storage,palladium(Pd)nanoparticles were innovatively decorated by carbon bridge onto the amino-group functioned Zr-terephthalate metal-organic framework(MOF)UiO-66 to reduce the diffusion energy barrier and then improve the hydrogen spillover effect.Powder X-ray diffraction shows broad Pd peak and retained UiO-66-NH2 integrity after Pd decoration.The hydrogen uptake capacity show that UiO-66-NH2-Pd exhibits best hydrogen storage performance than UiO-66-NH2 and pristine UiO-66.The hydrogen up taken in Pd decorated UiO-66(UiO-66-NH2-1 Pd)was close to 4 wt％ under 20 MPa at room temperature.Density functional theory(DFT)calculations show that hydrogen adsorption energy of UiO-66-NH2-Pd was-0.5897 eV,which was much lower than that of UiO-66-NH2(-0.3716 eV)and UiO-66(-0.2975 eV).Ultimately,Pd decorated NH2 group func-tioned UiO-66 enable improve storage capacities through hydrogen spillover under ambient conditions which could satisfy the demand for sustainable energy,especially for the long-term storage energy media.
Hydrogen storageUiO-66-NH2Pd decoratedSpillover
Jingchuan Wang、Junhong Luo、Yong Yao、Jiangfeng Song、Yan Shi
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Institute of Materials,China Academy of Engineering Physics,Jiangyou 621908,China
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