Conductivity at Low Humidity of Materials Derived from Ferroxane Particles
Carboxylic-acid-stabilised γ-FeOOH particles (ferroxanes) are synthesized using a precipitation from aqueous solution, and a following reaction with acetic acid. The materials produced with these powders are investigated by XRD, SEM, nitrogen adsorption-desorption, and impedance spectroscopy. Conduc...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Electrochemistry |
| Online Access: | http://dx.doi.org/10.1155/2012/930537 |
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| _version_ | 1849408288292077568 |
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| author | Alberto Lapina Peter Holtappels Mogens Mogensen |
| author_facet | Alberto Lapina Peter Holtappels Mogens Mogensen |
| author_sort | Alberto Lapina |
| collection | DOAJ |
| description | Carboxylic-acid-stabilised γ-FeOOH particles (ferroxanes) are synthesized using a precipitation from aqueous solution, and a following reaction with acetic acid. The materials produced with these powders are investigated by XRD, SEM, nitrogen adsorption-desorption, and impedance spectroscopy. Conductivity of both sintered and unsintered materials decreases strongly with a decrease in water partial pressure in the atmosphere during the test. The highest conductivity (7·10−3 S cm−1) is measured in air (pH2O = 0.037 atm) at room temperature on sintered material. The conductivity values are compared with other works in the literature and the dependence of conductivity on surface area and pore size is discussed. It is suggested that both unsintered and sintered materials act as proton conductors at room temperature under moderate humidity conditions. |
| format | Article |
| id | doaj-art-39e300e82d2249dc9509b363b05610d2 |
| institution | Kabale University |
| issn | 2090-3529 2090-3537 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Electrochemistry |
| spelling | doaj-art-39e300e82d2249dc9509b363b05610d22025-08-20T03:35:50ZengWileyInternational Journal of Electrochemistry2090-35292090-35372012-01-01201210.1155/2012/930537930537Conductivity at Low Humidity of Materials Derived from Ferroxane ParticlesAlberto Lapina0Peter Holtappels1Mogens Mogensen2Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, P.O. Box 49, 4000 Roskilde, DenmarkDepartment of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, P.O. Box 49, 4000 Roskilde, DenmarkDepartment of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, P.O. Box 49, 4000 Roskilde, DenmarkCarboxylic-acid-stabilised γ-FeOOH particles (ferroxanes) are synthesized using a precipitation from aqueous solution, and a following reaction with acetic acid. The materials produced with these powders are investigated by XRD, SEM, nitrogen adsorption-desorption, and impedance spectroscopy. Conductivity of both sintered and unsintered materials decreases strongly with a decrease in water partial pressure in the atmosphere during the test. The highest conductivity (7·10−3 S cm−1) is measured in air (pH2O = 0.037 atm) at room temperature on sintered material. The conductivity values are compared with other works in the literature and the dependence of conductivity on surface area and pore size is discussed. It is suggested that both unsintered and sintered materials act as proton conductors at room temperature under moderate humidity conditions.http://dx.doi.org/10.1155/2012/930537 |
| spellingShingle | Alberto Lapina Peter Holtappels Mogens Mogensen Conductivity at Low Humidity of Materials Derived from Ferroxane Particles International Journal of Electrochemistry |
| title | Conductivity at Low Humidity of Materials Derived from Ferroxane Particles |
| title_full | Conductivity at Low Humidity of Materials Derived from Ferroxane Particles |
| title_fullStr | Conductivity at Low Humidity of Materials Derived from Ferroxane Particles |
| title_full_unstemmed | Conductivity at Low Humidity of Materials Derived from Ferroxane Particles |
| title_short | Conductivity at Low Humidity of Materials Derived from Ferroxane Particles |
| title_sort | conductivity at low humidity of materials derived from ferroxane particles |
| url | http://dx.doi.org/10.1155/2012/930537 |
| work_keys_str_mv | AT albertolapina conductivityatlowhumidityofmaterialsderivedfromferroxaneparticles AT peterholtappels conductivityatlowhumidityofmaterialsderivedfromferroxaneparticles AT mogensmogensen conductivityatlowhumidityofmaterialsderivedfromferroxaneparticles |