3rd Workshop on the Simultaneous Combination of Spectroscopies with X-ray Absorption, Scattering and Diffraction Techniques

Low temperature synthesis of amorphous nickel silicide colloids and their use as precursors for the preparation of highly dispersed sup-ported nickel nanoparticles.

5 Jul 2012, 10:30

1h 30m

Main Hall HG E

Poster contribution Catalysis Poster Session

Speaker

Dr David Baudouin (Post doctorate)

Description

The preparation of Ni nanoparticles smaller than 2-3 nm still remains a challenge today. Yet, using a colloidal approach for the synthesis of Nickel-Silane based nanoparticles, [NixSi-C8H17], we successively prepared silica supported nickel NPs having a size of 1.3±0.2 nm, corresponding to a dispersion of 71±5 %. XAS and in situ liquid NMR indicated that the initial colloidal nanoparticles were Nix(Si-C8H17)y aggregates, the nickel environment being close to amorphous nickel silicide (Ni3Si2).