Thermally Stable TiO₂ - and SiO₂ -Shell-Isolated Au Nanoparticles for In Situ Plasmon-Enhanced Raman Spectroscopy of Hydrogenation Catalysts.

ABSTRACT: Raman spectroscopy is known as a powerful technique for solid catalyst characterization as it provides vibrational fingerprints of (metal) oxides, reactants, and products. It can even become a strong surface-sensitive technique by implementing shell-isolated surface-enhanced Raman spectroscopy (SHINERS). Au@TiO₂ and Au@SiO₂ shell-isolated nanoparticles (SHINs) of various sizes were therefore prepared for the purpose of studying heterogeneous catalysis and the effect of metal oxide coating. Both SiO₂ - and TiO₂ -SHINs are effective SHINERS substrates and thermally stable up to 400 °C. Nano-sized Ru and Rh hydrogenation catalysts were assembled over the SHINs by wet impregnation of aqueous RuCl₃ and RhCl₃ . The substrates were

SUBMITTER: Hartman T 

PROVIDER: S-EPMC5873377 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature