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Local structural characterization of Au/Pt bimetallic nanoparticles |
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| Authors: | HM Chen H-C Peng RS Liu SF Hu L-Y Jang |
| Institution: | aDepartment of Chemistry, National Taiwan University, #1, Section 4, Roosevelt Road, Taipei 106, Taiwan, ROC bNational Nano Device Laboratories, Hsinchu 300, Taiwan, ROC cNational Synchrotron Radiation Research Center, Hsinchu 300, Taiwan, ROC |
| Abstract: | In this study, we examined the amount-dependent change in morphology for a series of Au/Pt bimetallic nanoparticles synthesized using chemical reduction. The Au/Pt molar ratio was varied from 1/1 to 1/4 to synthesize Pt shell layers with different thicknesses. We have obtained that these bimetallic nanoparticles can form flower-like nanoparticles. Moreover, an extended X-ray absorption fine structure (EXAFS) analysis was used to demonstrate the structure of Au/Pt bimetallic nanoparticles. The EXAFS results confirmed the formation of a core–shell structure and inter-diffusion between Au and Pt atoms. The composition of the shell layer was found to be Pt-enriched Au/Pt alloy. |
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