Pd Nanoparticles Embedded into a Metal-Organic Framework: Synthesis, Structural Characteristics, and Hydrogen Sorption Properties

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• 作者：Claudia Zlotea ; Renato Campesi ; Fermin Cuevas ; Eric Leroy ; Philippe Dibandjo ; Christophe Volkringer ; Thierry Loiseau ; Grard Frey ; Michel Latroche
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：March 10, 2010
• 年：2010
• 卷：132
• 期：9
• 页码：2991-2997
• 全文大小：329K
• 年卷期：v.132,no.9(March 10, 2010)
• ISSN：1520-5126

文摘

The metal-organic framework MIL-100(Al) has been used as a host to synthesize Pd nanoparticles (around 2.0 nm) embedded within the pores of the MIL, showing one of the highest metal contents (10 wt %) without degradation of the porous host. Textural properties of MIL-100(Al) are strongly modified by Pd insertion, leading to significant changes in gas sorption properties. The loss of excess hydrogen storage at low temperature can be correlated with the decrease of the specific surface area and pore volume after Pd impregnation. At room temperature, the hydrogen uptake in the composite MIL-100(Al)/Pd is almost twice that of the pristine material. This can be only partially accounted by Pd hydride formation, and a “spillover” mechanism is expected to take place promoting the dissociation of molecular hydrogen at the surface of the metal nanoparticles and the diffusion of monatomic hydrogen into the porosity of the host metal-organic framework.