Borohydride Reduction of Nickel and First Transition Metals in Tetrahydrofurane Media. Controllable Chemistry Leading to Nanoscale Metal and Metal Boride Particles

ACOSTA DELICIA; ERDMAN ELEONORA,; CARRERA CELESTE,; RAMIREZ NORMA,; GONZO ELIO E.; DESTEFANIS HUGO,

Natal, Brasil.

Simposio; VI Encontro SBPMat 2007; 2007

Sociedad Brasilera de Investigacion en Materiales

Abstract Nickel borides doped with transition Metal (Cr, Mn Fe, Co, Cu and Zn) MNiB, 4% w/w respect to Ni were prepared by chemical reduction of nickel and metalic (Cr, Mn, Fe, Co, Cu, Zn) salts with borane-tetrahydrofurane (BH3-THF) complex in aprotic solvent (THF anhydrous). Different techniques were used to characterize these materials. The MNiB amorphous structure was verified by XRD. The results show that bimetallic borides follow a pattern related to the nature of the dopant metal. The oxidation stability, magnetic susceptibility and catalytic effect are correlated with parameters of each dopant metal. SEM studies show the same spongy-morphology in all cases.