on the Electrodeposited Catalysts
Structure and Catalytic Properties
N. A. Maiorovaa, E. K. Tuseevaa, V. E. Sosenkina, A. Yu. Rychagova, Yu. M. Vol’fkovicha,
A. V. Krestininb, G. I. Zverevab, O. M. Zhigalinac, and O. A. Khazovaa,z
aFrumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia
bInstitute of Problems in Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast’, 142432 Russia
cShubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr., Moscow, 119991 Russia
Received July 17, 2008
Abstract—The structure and hydrophilic–hydrophobic properties of functionalized single-wall carbon nano-
tubes are studied by the standard porosimetry method. It is shown that the functionalized nanotubes have highly
hydrophilic surface; at that the summary surface area measured “by octane” decreased, as a result of the func-
tionalizing, due to the blocking of the nanotubes’ inner channels by the functional groups located at the nano-
tubes’ ends. The nanotubes’ capacitive properties are studied; their charging–discharging curves appeared
being highly reversible, unlike those of other carbonaceous materials. Catalytic properties of the functionalized
nanotubes are studied, with particular tendency toward their using as a carrier of platinum catalysts for the
methanol oxidation and oxygen electroreduction reactions. When minor amounts (5–10 
g cm–2) of platinum
or platinum–ruthenium alloy are deposited onto the nanotubes’ hydrophilic surface, uniform layer of the cata-
lyst is formed, with specific surface area up to 150–300 m2 g–1; high current of the methanol oxidation or oxy-
gen electroreduction is observed at these catalysts. When the catalyst deposit mass increased, its specific surface
area decreased, as well as the specific current of the reactions occurring thereon. When the current is related to
the electrochemically active unit surface, the catalytic activity is nearly the same both for different catalyst mass
deposited onto the nanotubes and the same catalyst mass at different carbonaceous carriers.
Key word: functionalized nanotubes, structure, electrocatalysis, platinum-containing catalysts, methanol oxida-
tion, oxygen reduction
DOI: 10.1134/S1023193509090158
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