Journal
CHEMISTRY OF MATERIALS
Volume 14, Issue 6, Pages 2553-2558Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm011287h
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Cobalt nanoparticles encapsulated in carbon shells have been synthesized by catalytic chemical vapor deposition (CCVD) in high yield by reducing with a H-2/CH4 gas mixture a Mg0.9Co0.1O solid solution impregnated MgO (SSI-MgO) catalyst. The carbon-encapsulated Co nanoparticles have a narrow distribution of diameters within the range 5-15 nm. They are made of (fcc)-Co as shown by XRD and are very stable to air oxidation; the magnetic properties have been investigated using a SQUID magnetometer and confirm that Co is present in the metallic state.
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