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Journal of Applied Electrochemistry

, Volume 40, Issue 2, pp 257–263 | Cite as

Electrodeposited platinum catalysts over hierarchical carbon monolithic support

  • Mariano M. Bruno
  • Esteban A. Franceschini
  • Gabriel A. Planes
  • Horacio R. CortiEmail author
Original Paper

Abstract

Mesoporous deposits of platinum catalysts were electrodeposited over monolith carbon with hierarchical porous structure. The liquid crystal used as a template allowed the electrodeposition of the catalyst on the outer region of the carbon with low penetration in the porous structure. The platinum hexagonal mesostructured deposits exhibits an excellent stability enhanced by the roughness of the carbon support. The mass activity for the electrooxidation of methanol of the mesoporous Pt catalyst supported on the hierarchical carbon is similar to that observed on gold and to that reported for commercial Pt nanoparticulated catalysts, even when this catalyst has a smaller Pt load than the commercial one. Also, the poisoning rate of the mesoporous catalyst is lower than that observed for the commercial catalyst. The integrated system of structured materials could be suitable for the fabrication of modified electrodes in small scale applications.

Keywords

Platinum Mesoporous catalyst Hierarchical carbon Methanol oxidation Poisoning rate 

Abbreviations

PEM

Polymer exchange membrane

HC

Hierarchical carbon

RF

Resorcinol formaldehyde

MC

Mesopororous catalyst

HCMC

Hierarchical carbon–mesopororous catalyst

ca.

Circa

RHE

Reversible hydrogen electrode

δ

Poisoning rate

RMS

Root mean square

Notes

Acknowledgments

The authors thank financial support from Agencia Nacional de Promoción Científica y Tecnológica (PICT Start Up 35403), and CONICET (PIP 5977). The contributions of Dr. G. Soler Illia and the National Synchrotron Light Laboratory (LNLS, Campinas – Brazil) in the GISAXS measurement are gratefully acknowledged. GAP and HRC are permanent research fellows of CONICET. MB and EF thank to CONICET for their fellowships.

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Mariano M. Bruno
    • 1
  • Esteban A. Franceschini
    • 1
  • Gabriel A. Planes
    • 2
  • Horacio R. Corti
    • 1
    Email author
  1. 1.Grupo de Celdas de Combustible, Departamento de Física de la Materia CondensadaCentro Atómico ConstituyentesSan Martín, Buenos AiresArgentina
  2. 2.Departamento de Química, Facultad de Ciencias Exactas, Fisicoquímicas y NaturalesUniversidad Nacional de Río CuartoRío CuartoArgentina

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