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Tusseeva E. K. Mikhaylova A. A. Khazova O. A. Kourtakis K.-D. 《Russian Journal of Electrochemistry》2004,40(11):1146-1151
Possibilities for production of active Pt–Ru electrodes for the direct methanol fuel cell with a decreased content of platinum-group metals in them are studied. Platinum and ruthenium are electrodeposited on a thin layer of carbon black applied to a Nafion 117 membrane. The deposition potential effect on the specific surface area of the catalyst and its electrochemical activity in the methanol oxidation is studied. The oxidation currents are related to unit true surface area or unit catalyst mass. The dependence of activity on the Pt : Ru ratio in the plating solution and in the deposit is studied. The effect of the catalyst amount deposited and the particle size on the activity is studied. It is shown that the catalytic activity decreases at the average diameter of Pt–Ru particles less than 4 nm. The results are compared with the size effects observed earlier. 相似文献
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Tusseeva E. K. Kulova T. L. Skundin A. M. Galeeva A. K. Kurbatov A. P. 《Russian Journal of Electrochemistry》2019,55(3):194-199
Russian Journal of Electrochemistry - The systematic study of the effect of temperature (in the range from ?45 to +60°C) on the process of lithium extraction from LiFePO4 and its... 相似文献
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Tusseeva E. K. Kulova T. L. Skundin A. M. Galeeva A. K. Kurbatov A. P. 《Russian Journal of Electrochemistry》2019,55(3):200-205
Russian Journal of Electrochemistry - The effect of the active layer thickness (the amount of active material per unit area of the electrode) on the behavior of electrodes based on lithium iron... 相似文献
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A. A. Mikhaylova E. K. Tusseeva A. Yu. Rychagov Yu. M. Vol’fkovich A. V. Krestinin O. A. Khazova 《Russian Journal of Electrochemistry》2010,46(11):1280-1288
Composites of functionalized single-wall carbon nanotubes and polyaniline are deposited onto electrodes by in situ electrochemical
polymerization. Their electrochemical behavior and differential capacitance are studied by cyclic voltammetry, electrochemical
impedance spectroscopy, and chronovoltamperometry. The differential capacitance of the composite electrode exceeds that of
pure polyaniline film deposited onto electrode, which can be explained by the nanotubes’ loosening effect on the polyaniline
structure. The composite-electrode capacitance is as large as 1000 F g−1 or higher. Thus obtained composite films were used as a support for deposited platinum-ruthenium catalyst. The Pt-Ru structure
and catalytic properties in the methanol oxidation reaction are studied. It is shown that the specific current of methanol
oxidation at Pt-Ru is larger by a factor of 7–15 than those measured when pure polyaniline, pure carbon nanotubes, or standard
Vulcan XC-72 carbon black are used as supports. It is found that the catalytic activity is the same for all studied supports,
provided the current is reduced to the unit of Pt-Ru true surface area. Thus, the observed large catalytic effect is associated
with the structure and high dispersivity of the electrodeposited metals incorporated to the single-wall carbon nanotubes-polyaniline
composite. 相似文献
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E. K. Tusseeva O. M. Zhigalina A. L. Chuvilin A. V. Naumkin O. A. Khazova 《Russian Journal of Electrochemistry》2013,49(3):265-271
A catalytic system consisting of carbon nanotubes, poly(diallyldimethylammonium)chloride, and a very thin layer of platinum or platinum-ruthenium is assembled layer-by-layer (LbL) on a glassy carbon (GC) electrode. Deposits of platinum metals are studied by electrochemical methods, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma atomic emission spectroscopy (ICP-AES). Such catalyst layers are shown to exhibit much higher activity in the methanol oxidation reaction as compared with commercial and electroplated catalysts. The currents compared are calculated per the surface area of deposited metals determined with respect to hydrogen adsorption. 相似文献
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