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Ruthenium oxide/carbon composites having a microporous carbon or a mesoporous carbon as support. A comparative study as supercapacitor electrodes

AuthorsPico, F.; Morales, E. ; Fernández, J. A.; Álvarez Centeno, Teresa ; Ibáñez, Joaquín; Rojas, R. M.; Amarilla, José Manuel ; Rojo, J. M.
Keywordsruthenium oxide
microporous carbon
mesoporous carbon
Issue Date1-Mar-2009
CitationElectrochimica Acta 54 : 2239–2245 (2009)
AbstractComposites have been prepared by depositing nanoparticles of RuO2.xH2O (1-5 nm) on two carbons: a microporous carbon (1.3 nm of pore size) and a mesoporous carbon (11 nm of pore size). The composites have been obtained by two ways: (i) way A consisting of an accumulative impregnation treatment of the carbons with RuCl3.0.5H2O solution, and (ii) way B consisting of a impregnation of the carbons with Ru(acac)3 vapour. The way B leads to supported RuO2.xH2O particles that appear more crystalline and more heterogeneous in size than those obtained by way A. Specific surface area and specific capacitance of the composites have been measured. The two magnitudes, which are analysed as a function of the RuO2 content, show very different dependences for the composites derived from the two carbons. They are discussed on the basis of the size of the supported RuO2.xH2O particles in comparison to the size of the carbon pores.
Publisher version (URL)http://dx.doi.org/10.1016/j.electacta.2008.10.028
URIhttp://hdl.handle.net/10261/33992 doi:10.1016/j.electacta.2008.10.028
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