کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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613398 | 880721 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The preparation of Pt nanoparticles by methanol and citrate The preparation of Pt nanoparticles by methanol and citrate](/preview/png/613398.png)
Platinum nanoparticles of 2–3 nm average size and ca. ±2 nm distribution can be successfully prepared by methanol reduction while using sodium citrate as the stabilizer. Sol formation was investigated by UV–visible spectroscopy and EXAFS (extended X-ray absorption fine structure spectroscopy). The formation of Pt nanoparticles was confirmed by the presence of Pt–Pt bonding in the solution after a certain induction period in methanol-reduced sol with or without citrate. The possible two-step reduction of Pt(IV) was revealed by correlating EXAFS, UV–visible spectra and pH data. The presence of citrate resulted in a smaller Pt–Pt coordination number and a slower sol formation process. All these results prove that citrate acted as the stabilizer in this synthesis.
Pt nanoparticles of ca. 2 nm average size can be successfully prepared by methanol reduction while using sodium citrate as the stabilizer. The presence of citrate resulted in a smaller Pt–Pt coordination number and a slower sol formation process.Figure optionsDownload as PowerPoint slide
Journal: Journal of Colloid and Interface Science - Volume 299, Issue 2, 15 July 2006, Pages 678–685