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Abstract:

Nanoparticles of PtRu supported on mesoporous carbon were obtained by the impregnation and reduction method with NaBH 4. The high-surface-area mesoporous carbon was obtained by carbonization of a resorcinol-formaldehyde polymer with a cationic polyelectrolyte as a soft template. Surface characterization performed by transmission electron microscopy and powder X-ray diffraction showed a homogeneous distribution and high dispersion of metal particles. The PtRu catalyst shows an electrochemical active surface area, determined by CO stripping, 45% higher than PtRu catalyst synthesized by the same method on Vulcan. This translated in a 25% increase in the methanol oxidation current as well as a lower poisoning rate and higher turnover frequency, as was assessed by cyclic voltammetry and chronoamperometry. Differential electrochemical mass spectroscopy indicated an 8% higher conversion efficiency of methanol to CO 2, demonstrating the benefits of using a mesoporous carbon as catalyst support. © 2011 American Chemical Society.

Registro:

Documento: Artículo
Título:Electrochemical characterization of PtRu nanoparticles supported on mesoporous carbon for methanol electrooxidation
Autor:Viva, F.A.; Bruno, M.M.; Jobbágy, M.; Corti, H.R.
Filiación:Grupo Celdas de Combustible, Departamento de Física de la Materia Condensada, Comisión Nacional de Energía Atómica (CNEA), Av General Paz 1499 (1650), San Martín, Buenos Aires, Argentina
Escuela de Ciencia y Tecnología, Universidad de Gral. San Martín, Martin de Irigoyen 3100 (1650), San Martín, Buenos Aires, Argentina
Instituto de Química Física de Los Materiales, Medio Ambiente y Energía, Universidad de Buenos Aires - CONICET, Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina
Palabras clave:Cationic polyelectrolyte; CO stripping; Differential electrochemical mass spectroscopies; Electrochemical active surface areas; Electrochemical characterizations; High dispersion; Homogeneous distribution; Mesoporous carbon; Metal particle; Methanol electrooxidation; Methanol oxidation currents; Powder X ray diffraction; Pt-Ru catalysts; Pt-Ru nanoparticles; Reduction method; Resorcinol formaldehydes; Soft template; Surface characterization; Turnover frequency; Carbon dioxide; Carbonization; Catalysts; Chronoamperometry; Conversion efficiency; Cyclic voltammetry; Electrooxidation; Mass spectrometry; Mesoporous materials; Methanol; Phenols; Platinum alloys; Transmission electron microscopy; X ray diffraction; Carbon
Año:2012
Volumen:116
Número:6
Página de inicio:4097
Página de fin:4104
DOI: http://dx.doi.org/10.1021/jp209549g
Título revista:Journal of Physical Chemistry C
Título revista abreviado:J. Phys. Chem. C
ISSN:19327447
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v116_n6_p4097_Viva

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Citas:

---------- APA ----------
Viva, F.A., Bruno, M.M., Jobbágy, M. & Corti, H.R. (2012) . Electrochemical characterization of PtRu nanoparticles supported on mesoporous carbon for methanol electrooxidation. Journal of Physical Chemistry C, 116(6), 4097-4104.
http://dx.doi.org/10.1021/jp209549g
---------- CHICAGO ----------
Viva, F.A., Bruno, M.M., Jobbágy, M., Corti, H.R. "Electrochemical characterization of PtRu nanoparticles supported on mesoporous carbon for methanol electrooxidation" . Journal of Physical Chemistry C 116, no. 6 (2012) : 4097-4104.
http://dx.doi.org/10.1021/jp209549g
---------- MLA ----------
Viva, F.A., Bruno, M.M., Jobbágy, M., Corti, H.R. "Electrochemical characterization of PtRu nanoparticles supported on mesoporous carbon for methanol electrooxidation" . Journal of Physical Chemistry C, vol. 116, no. 6, 2012, pp. 4097-4104.
http://dx.doi.org/10.1021/jp209549g
---------- VANCOUVER ----------
Viva, F.A., Bruno, M.M., Jobbágy, M., Corti, H.R. Electrochemical characterization of PtRu nanoparticles supported on mesoporous carbon for methanol electrooxidation. J. Phys. Chem. C. 2012;116(6):4097-4104.
http://dx.doi.org/10.1021/jp209549g