Electrooxidation of CO and methanol on well-characterized carbon supported Pt xSn electrodes. Effect of crystal structure

T. Herranz, S. García, M. V. Martínez-Huerta, M. A. Peña, J. L G Fierro, F. Somodi, I. Borbáth, K. Majrik, A. Tompos, S. Rojas

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The role of two intermetallic phases of PtSn, namely Pt 3Sn (fcc phase) and PtSn (hcp phase) for the electrooxidation of CO and methanol has been evaluated. Carbon supported Pt 3Sn and PtSn nanosized particles have been prepared by controlled surface reactions. The actual structure of the PtSn alloys has been evaluated and confirmed by means of XRD and HR-TEM studies which reveal the predominance of either the hcp or the fcc phase in each catalyst. The catalysts have been further characterized to identify the actual metal loading and Pt/Sn atomic ratio in order to eliminate particle size or metal loading effects on their electrocatalytic performance. The performance of the catalysts for the electrooxidation of CO and methanol has been evaluated by electrochemical techniques along with in situ techniques such as electrochemical coupled Infrared Reflection Absorption Spectroscopy (EC-IRAS) and differential electrochemical mass spectrometry (DEMS). Altogether, the results presented in this work reveal that Pt 3Sn fcc is more active than PtSn hcp for the electrooxidation of CO and methanol and that the contribution of the hcp phase in those electrocatalytic processes is negligible.

Original languageEnglish
Pages (from-to)7109-7118
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number8
DOIs
Publication statusPublished - Apr 2012

Fingerprint

Electrooxidation
Methanol
methyl alcohol
Crystal structure
catalysts
Electrodes
Catalysts
crystal structure
Carbon
electrodes
carbon
infrared reflection
Surface reactions
Metals
Absorption spectroscopy
metals
surface reactions
Intermetallics
Mass spectrometry
intermetallics

Keywords

  • CO
  • DEMS
  • EC-IRAS
  • Methanol
  • Pt Sn fcc
  • PtSn hcp

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Herranz, T., García, S., Martínez-Huerta, M. V., Peña, M. A., Fierro, J. L. G., Somodi, F., ... Rojas, S. (2012). Electrooxidation of CO and methanol on well-characterized carbon supported Pt xSn electrodes. Effect of crystal structure. International Journal of Hydrogen Energy, 37(8), 7109-7118. https://doi.org/10.1016/j.ijhydene.2011.11.131

Electrooxidation of CO and methanol on well-characterized carbon supported Pt xSn electrodes. Effect of crystal structure. / Herranz, T.; García, S.; Martínez-Huerta, M. V.; Peña, M. A.; Fierro, J. L G; Somodi, F.; Borbáth, I.; Majrik, K.; Tompos, A.; Rojas, S.

In: International Journal of Hydrogen Energy, Vol. 37, No. 8, 04.2012, p. 7109-7118.

Research output: Contribution to journalArticle

Herranz, T. ; García, S. ; Martínez-Huerta, M. V. ; Peña, M. A. ; Fierro, J. L G ; Somodi, F. ; Borbáth, I. ; Majrik, K. ; Tompos, A. ; Rojas, S. / Electrooxidation of CO and methanol on well-characterized carbon supported Pt xSn electrodes. Effect of crystal structure. In: International Journal of Hydrogen Energy. 2012 ; Vol. 37, No. 8. pp. 7109-7118.
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