Preparation of supported Pt nanoparticles by supercritical fluid reactive deposition: Influence of precursor, substrate and pressure on product properties

- Pt(COD)Me2 and five fluorinated precursors Pt(COD)MeX with X = CnF2n+1 were used to deposit nanoscale Pt nanoparticles on powdery TiO2, Al2O3, MCM-41.
- Decreasing amount of precursor in CO2 and increasing surface area of the supporting material promote a small particle size and a close particle size distribution.
- Results of SFRD experiments show that Pt nanoparticles as small as 1.8 nm and high Pt loadings up to 66 mg/g can be produced.