Physico-chemical properties of carbon nanotubes as supports for cathode catalysts of fuel cells. Surface structure and corrosion resistance
| Autor: | V. A. Bogdanovskaya, E. M. Kol’tsova, G. V. Zhutaeva, Tarasevich Mikhail R, L. P. Kazanskii, E. A. Skichko, M. V. Radina, N. N. Gavrilova |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
chemistry.chemical_element Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences Methane Corrosion law.invention Catalysis chemistry.chemical_compound law Materials Chemistry Electrochemical reduction of carbon dioxide Organic Chemistry Metals and Alloys Carbon black 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Chemical engineering chemistry Carbon nanotube supported catalyst 0210 nano-technology Carbon |
| Zdroj: | Protection of Metals and Physical Chemistry of Surfaces. 52:45-54 |
| ISSN: | 2070-206X 2070-2051 |
| Popis: | Multiwalled carbon nanotubes (CNTs) were synthesized by catalytic pyrolysis of methane on iron-cobalt or cobalt-molybdenum catalyst and investigated by electrochemical and physico-chemical methods before and after chemical or electrochemical corrosion treatment. It is shown that CNTs have a higher corrosion resistance than does turbostratic carbon (carbon black) in corrosion testing under the same conditions. This is expressed in a smaller change in the amount of oxygen on the surface of the carbon material, the values of the electrochemically active surface area (EAS), and in significant differences of these quantities for the CNTs compared to carbon black. Quantitative comparison of the results of chemical and electrochemical treatment of CNT and carbon black, which was performed in this paper for the first time, leads to the conclusion regarding the advantages of corrosion testing by chemical method. Chemical testing simulates to a greater extent the long-term testing conditions of the supported catalysts composed of membrane-electrode assemblies of fuel cells in terms of evaluating the stability of the carbon material as a support of the catalytically active centers. |
| Databáze: | OpenAIRE |
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