Au-Pd Core-Shell Nanoparticles Fabrications and Applications on Catalysis
碩士 === 國立高雄大學 === 應用化學系碩士班 === 97 === In this study we synthesis well distribution gold nanoparticles (GNPs) as seed, palladium were reduced onto the surface of the seed particles by ascorbic acid, and then used as catalysts for the Suzuki reaction. TEM, SEM, and UV–vis spectrum were used to charact...
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| Format: | Others |
| Language: | zh-TW |
| Online Access: | http://ndltd.ncl.edu.tw/handle/hm8p7u |
| Summary: | 碩士 === 國立高雄大學 === 應用化學系碩士班 === 97 === In this study we synthesis well distribution gold nanoparticles (GNPs) as seed, palladium were reduced onto the surface of the seed particles by ascorbic acid, and then used as catalysts for the Suzuki reaction. TEM, SEM, and UV–vis spectrum were used to characterize the core–shell sample and the monometallic samples. To discuss different core size and shell thickness cause catalyst activity change. The results suggest that the best catalyst activity obtain when palladium thickness between 1~2 nm, and just only a little amount catalyst (<1 % mole) that can arrive high reaction yield. The improvement of activity is due to the electron transfer interaction between Pd shell and Au core. The core–shell structure could significantly improve the catalytic activity and stability of Pd in water under mild conditions, and after fourth cycles it still with good reusability and reproducibility.
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