SciELO - Scientific Electronic Library Online

 
vol.50 número3ELECTROPOLYMERIZATION OF HETEROARYLENE AZOMETHINESELECTRODIC POLYMER MATERIALS BASED IN ANILINE: INFLUENCE OF Ni2+, Co2+, AND Cu2+ IONS ON ITS FORMATION índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

Compartir


Journal of the Chilean Chemical Society

versión On-line ISSN 0717-9707

Resumen

CARDENAS-TRIVINO, GALO. CHEMICAL REACTIONS AT NANOMETAL PARTICLES. J. Chil. Chem. Soc. [online]. 2005, vol.50, n.3, pp.603-612. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072005000300014.

The concept of nanochemistry and the reactions involved are discussed. The work is focused on nanoparticles obtained from colloidal dispersions. The colloidal particles by transmission electron microscopy of low and high resolution were analyzed. The high resolution electron miscroscopy (HRTEM) allow us to classify the nanostructure of the metal particles in some polyhedral models: cubooctahedron, truncated octahedron, tetracai decahedron and icosahedron. Some HRTEM of Pd-2 propanol and Ge-2-propanol are analyzed. The Pd atoms exhibit a high crystalline nanoparticles, cubooctahedral arrangement in the [001] orientation. On the other hand , the Ge atoms are ordered in a pseudohexagonal arrangement. The spacing in the last system are typical of a diamond cubic Ge structure. The structure of nanometals and also some relevant properties of nanoclusters are discussed. Some heterogeneous catalysis applications of supported metal clusters are discussed. Selective hydrogenation of a, b-unsaturated aldehydes are based on Pd, Rh, Ru, Os, Ir, Ni, Co and Pd.. In particular the crotonaldehyde hydrogenation in the presence of Pd/SiO2, Pd/Al2O3, PdSn/SiO2 and PdSn/Al2O3 was measured. The influence of the organic fragments incorporated on the surface of the particles in the systems mentioned above was studied. Finally, some remarks of the advantage of this technique in order to obtain nanoclusters are summarized

        · texto en Inglés

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons