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Silica coated noble metal nanoparticle hydrosols as supported catalyst precursors

Kong, T.S.A., Yu, K.M.K. and Tsang, S.C. (2006) Silica coated noble metal nanoparticle hydrosols as supported catalyst precursors. Journal of Nanoscience and Nanotechnology, 6 (4). pp. 1167-1172. ISSN 1533-4880

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To link to this item DOI: 10.1166/jnn.2006.165

Abstract/Summary

Synthesis of well-defined nanoparticles has been intensively pursued not only for their fundamental scientific interest, but also for many technological applications. One important development of the nanomaterial is in the area of chemical catalysis. We have now developed a new aqueous-based method for the synthesis of silica encapsulated noble metal nanoparticles in controlled dimensions. Thus, colloid stable silica encapsulated similar to 5 nm platinum nanoparticle is synthesized by a multi-step method. The thickness of the silica coating could be controlled using a different amount of silica precursor. These particles supported on a high surface area alumina are also demonstrated to display a superior hydrogenation activity and stability against metal sintering after thermal activation.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11406
Uncontrolled Keywords:silica coated noble metals, dispersion, thermal activation and thermal, stability, GOLD, PARTICLES, COLLOIDS, ALLOYS

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