II International Symposium on Carbon for Catalysis ABSTRACTS

PP-I-14
temperature at which the material is produced, though), as well as high resistance to humid
and aggressive (acidic and alkaline) media and under hyperbaric conditions.
The nanosized bimetalic particles were introduced into the structure of carbon matrix
directly in the course of IR pyrolysis of composite-precursor on the basis of PAN and
mentioned above Pt and Ru compounds. Efficient reduction of metal takes place in the course
of IR pyrolysis of composite-precursor with participation of hydrogen, which is released in
dehydrogenation of main polymeric chain of PAN.
According to X-ray diffraction data, bimetallic nanosized particles are alloys with simple
cubic lattice (a=3.888 Å). The decrease of the lattice parameter to this value from а=3.923 Å
for Pt attests to formation of solid solutions of substitution. It is shown by transmission
electron microscopy method that bimetallic nanoparticles of diameter from 2 to 9 nm are
finely dispersed in carbon matrix, the ~90% Pt-Ru nanoparticles being 4-7 nm in size.
Nanocomposites IRPAN/Pt-Ru supported on carbon glassy were tested as catalysts in
reaction of direct electrochemical oxidation of methanol. The oxidation current was 2 mA/mg.
Not very high value of current obtained is connected with quite low value of catalytic surface.
Carbon-carbon nanocomposite based on IRPAN and multiwalled carbon nanotubes
(10% mas.) was applied as a carrier in order to increase catalytic activity.
Thus, developed method allows the inclusion of catalytically active metals in the
structure of carbon matrix in the course of the formation latter in the conditions of IRpyrolysis,
providing an uniform distribution of Pt-Ru bimetallic nanosized particles.
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