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Single-walled carbon nanotube buckypapers as electrocatalyst supports for methanol oxidation

AuthorsSieben, J.M.; Ansón Casaos, Alejandro ; Martínez Fernández de Landa, María Teresa; Morallón, E.
KeywordsCarbon nanotube buckypaper
Pt-Ru catalyst
Methanol oxidation
Issue Date15-Nov-2013
CitationJournal of Power Sources 242(11) : 7-14 (2013)
AbstractThis work studies the use of various single-walled carbon nanotube (SWCNT) buckypapers as catalyst supports for methanol electro-oxidation in acid media. Buckypapers were obtained by vacuum filtration from pristine and oxidized SWCNT suspensions in different liquid media. Pt-Ru catalysts supported on the buckypapers were prepared by multiple potentiostatic pulses using a diluted solution of Pt and Ru salts (2 mM H2PtCl6 + 2 mM RuCl3) in acid media. The resulting materials were characterized via SEM, TEM, EDX and ICP-OES analysis. Well dispersed rounded nanoparticles between 2 and 15 nm were successfully electrodeposited on the SWCNT buckypapers. The ruthenium content in the bimetallic deposits was between 32 and 48 at. %, while the specific surface areas of the catalysts were in the range of 72 to 113 m2 g-1. It was found that the solvent used to prepare the SWCNT buckypaper films has a strong influence on the catalyst dispersion, particle size and metal loading. Cyclic voltammetry and chronoamperometry experiments point out that the most active electrodes for methanol electro-oxidation were prepared with the buckypaper supports that were obtained from SWCNT dispersions in N-methyl-pyrrolidone.
Description7 pages, 7 figures, 3 tables.-Available online May 18, 2013
Publisher version (URL)http://dx.doi.org/10.1016/j.jpowsour.2013.05.044
Appears in Collections:(ICB) Artículos
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