Synthesis of AU and AG Catalysts with Controlled Sizes of Metal Particles

TL;DRAbstract

The performance of supported metal catalysts largely depends on the structure and composition of the metal particles and the nature of the support. In order to achieve better control over these parameters, synthetic route based on the use of templating agents has been proposed. Among the different templating agents, poly(amidoamine) (PAMAM) dendrimers have attracted a lot of recent attention as nanoparticle stabilizers. In this thesis, Au/G4OH nanocomposites were synthesized in aqueous solutions and used as precursors for the preparation of SiO2-supported Au nanoparticles. Elemental analysis, UV-Vis, and STEM measurements were used to estimate the extent of the Au-dendrimer interactions and to illustrate how the solution pH affect the number of Au atoms complexed with each dendrimer molecule, as well as the final size of the SiO2-supported gold particles. At pH=7, Au5/G4OH nanocomposites with sizes of Au particles below 2 nm can be formed and used as precursors for the preparation of s

Chat with Paper

AI Agents for this Paper