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

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Títol: Single-walled carbon nanotube buckypapers as electrocatalyst supports for methanol oxidation
Autors: Sieben, Juan Manuel | Ansón Casaos, Alejandro | Martínez Fernández de Landa, María Teresa | Morallon, Emilia
Grups d'investigació o GITE: Electrocatálisis y Electroquímica de Polímeros
Centre, Departament o Servei: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Paraules clau: Carbon nanotube buckypaper | Pt–Ru catalyst | Electrodeposition | Methanol oxidation
Àrees de coneixement: Química Física
Data de publicació: 15-de novembre-2013
Editor: Elsevier
Citació bibliogràfica: Journal of Power Sources. 2013, 242: 7-14. doi:10.1016/j.jpowsour.2013.05.044
Resum: This 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 72–113 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.
Patrocinadors: J.M.S. thanks Ministerio de Educación (SB2010-132). Financial support from MINECO and FEDER (MAT2010-15273, TEC 2010-15736 and PRI-PIBAR-2011-1 projects) and GV (ACOMP/2012/133 project) is acknowledged.
URI: http://hdl.handle.net/10045/35187
ISSN: 0378-7753 (Print) | 1873-2755 (Online)
DOI: 10.1016/j.jpowsour.2013.05.044
Idioma: eng
Tipus: info:eu-repo/semantics/article
Revisió científica: si
Versió de l'editor: http://dx.doi.org/10.1016/j.jpowsour.2013.05.044
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