In situ FT-IR of SiO2-supported (pph3)Hpt(μ-pph2)(μ-CO)Mo(co)4heterobinuclear hydrido carbonyl catalyst in the CO hydrogenation condition has been investigated.
Monodisperse platinum nanoparticles with controlled size were synthesized by polyol synthesis and supported on γ-Al2O3, SiO2 and carbon nanotubes (CNT) by the colloid deposition method. The average size of Pt nanopar...Monodisperse platinum nanoparticles with controlled size were synthesized by polyol synthesis and supported on γ-Al2O3, SiO2 and carbon nanotubes (CNT) by the colloid deposition method. The average size of Pt nanoparticles in colloidal solutions and on supports were determined by TEM images and from XRD patterns. The size of Pt nanoparticles supported on SiO2 and CNT determined from XRD patterns is in a good agreement with size obtained from the TEM analyses. There were shown that no agglomeration and size changing of Pt nanoparticles on these supports were observed. All these findings illustrate that the method of colloid deposition allows one to obtain catalyst with monodisperse platinum nanoparticles of controlled size deposited on different supports without changing the nanoparticle’s size and morphology.展开更多
文摘In situ FT-IR of SiO2-supported (pph3)Hpt(μ-pph2)(μ-CO)Mo(co)4heterobinuclear hydrido carbonyl catalyst in the CO hydrogenation condition has been investigated.
文摘Monodisperse platinum nanoparticles with controlled size were synthesized by polyol synthesis and supported on γ-Al2O3, SiO2 and carbon nanotubes (CNT) by the colloid deposition method. The average size of Pt nanoparticles in colloidal solutions and on supports were determined by TEM images and from XRD patterns. The size of Pt nanoparticles supported on SiO2 and CNT determined from XRD patterns is in a good agreement with size obtained from the TEM analyses. There were shown that no agglomeration and size changing of Pt nanoparticles on these supports were observed. All these findings illustrate that the method of colloid deposition allows one to obtain catalyst with monodisperse platinum nanoparticles of controlled size deposited on different supports without changing the nanoparticle’s size and morphology.
