Synthesis and Characterization of Dendrimer‐Encapsulated Bimetallic Core‐Shell PdPt Nanoparticles |
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| Authors: | Guoping Li Wenting Lu Yunjun Luo Min Xia Chunpeng Chai Xiaoqing Wang |
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| Institution: | School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China |
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| Abstract: | Using a successive method, PAMAM dendrimer‐encapsulated bimetallic PdPt nanoparticles have been successfully prepared with core‐shell structures (Pd@Pt DENs). Evidenced by UV‐vis spectra, high resolution transmission electron microscopy, and X‐ray energy dispersive spectroscopy (EDS), the obtained Pd@Pt DENs are monodispersed and located inside the cavity of dendrimers, and they show a different structure from monometallic Pt or Pd and alloy PdPt DENs. The core‐shell structure of Pd@Pt DENs is further confirmed by infrared measurements with carbon monoxide (IR‐CO) probe. In order to prepare Pd@Pt DENs, a required Pd/Pt ratio of 1:2 is determined for the Pt shell to cover the Pd core completely. Finally, a mechanism for the formation of Pd@Pt DENs is proposed. |
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| Keywords: | poly(amidoamine) (PAMAM) dendrimer dendrimer‐encapsulated nanoparticles (DENs) infrared carbon monoxide (IR‐CO) probe core‐shell nanoparticles |
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