ISSN:
1572-8870
Keywords:
Carbon composites
;
inorganic copolymers
;
α-iron particles
;
α-iron-carbon composites
;
β-cobalt particles
;
β-cobalt-carbon composites
;
nickel particles
;
nickel-carbon composites
;
ultrafine metal particles
;
pyrolysis of metal-containing polymers
;
metal-carbon composites
;
electrical conductivities
;
catalyst
;
organometallic polymers
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Uniformly dispersed, air-stable carbon composites containing ultrafine α-Fe, Co, or Ni particles were obtained by a careful two-step thermal degradation of a copolymer of acrylonitrile (AN) and 2,4-hexadienyl-[tri(carbonyl)iron] acrylate. Carbonization yields were 45–55% and metal particle size ranged from 80 to 120 nm. Analogous degradation of the acrylonitrile copolymer with CoCl2(AN)2, CoCl2(4-vinylpyridine)2, or Ni(bis-styrene carboxylate) gave similar composites containing β-Co (18 nm), β-Co (55 nm), or cubic Ni (52 nm) particles, respectively, with lower carbonization yields. Other salient features noted for the metal-containing composites are progressive graphitization promoted by catalysis of nascent metal species at low temperature, microporous structures with surface areas of 75 and 55 m2 g−1 for Co and Ni composites, respectively, high electrical conductivities (10–102 S cm−1), ferromagnetism, and catalysis in the decomposition of H2O2.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00701035
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