PdRu Bimetallic Nanoparticles/Metal–Organic Framework Composite through Supercritical CO2–Assisted Immobilization

Metal–nanoparticle (NP)/metal–organic framework (MOF) composites have attracted considerable attention as heterogeneous catalysts. Compared with porous carbon, silica, and alumina, the charge-transfer interaction between the metal NPs and the MOF accelerated the catalytic activity. In this study, Pd...

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Published in:ACS omega 2024-05, Vol.9 (18), p.20437-20443
Main Authors: Matsuyama, Kiyoshi, Matsuoka, Takumi, Eiro, Masashi, Kato, Takafumi, Okuyama, Tetsuya
Format: Article
Language:English
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Summary:Metal–nanoparticle (NP)/metal–organic framework (MOF) composites have attracted considerable attention as heterogeneous catalysts. Compared with porous carbon, silica, and alumina, the charge-transfer interaction between the metal NPs and the MOF accelerated the catalytic activity. In this study, PdRu bimetallic NPs were successfully immobilized on MOFs such as MIL-101­(Cr) by using supercritical carbon dioxide. The STEM-EDX images show a uniform 3D distribution of the PdRu bimetallic NPs on MIL-101­(Cr). The resulting PdRu@MIL-101­(Cr) catalyst exhibited higher CO oxidation than monometal/MOF composites such as Pd@MIL-101­(Cr) and Ru@MIL-101­(Cr). Furthermore, PdRu@MIL-101­(Cr) exhibited higher catalytic activity than PdRu@SiO2. This is because the particle size of the PdRu bimetallic NPs in MIL-101­(Cr) was within the range of 2–3 nm. The synergistic effects were based on the combination of two metals, Pd and Ru, small bimetal particle formation, and charge-transfer interactions between the bimetal NPs and the MOF. These factors enhance the catalytic activity of the bimetal/MOF composites.
ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.4c01401