Synthesis, Modification And Catalysis Of Gold And Platinum Nanoparticles

(1) Metal nanoparticles with different shapes and sizes were synthesized. Decahedron gold particles were prepared using thiol as protecing agent; Platinum particles with different size from 1.77nm to 16.32nm were prepared by the sacrificing hydrogen reduction method. And the effect of protecting agent quantity and reductant type on nanoparticles size was described.(2) The bimetallic nanoparticles were prepared. The core-shell Pt@Pt/Au nanoparticles were synthesized by the sacrificing hydrogen reduction method. They are characterized by TEM, XRD and UV-Vis measurements.(3) The states of MPA protected gold nanopartic es were strongly affected by the pH value; Platinum nanoparticles can partly dissolve in concentrated HC1, the effect of HC1 concentration was discussed.(4) Platinum nanoparticles modified with 1-batanethiol and Fe3+ exhibit higher selectivity than untreated Pt in the hydroge nation of trans 2,4-hexadienal; 1-butanethiol-modified Pt@Pt/Au nanoparticles show the different catalytic capability to the substrate molecular size.