CO adsorption in PdxCoyXz (X = Au, Mo, Ni) tertiary alloy nanocatalysts for PEM fuel cells-a theoretical analysis

Mauricio Garza Castañón, S. Velumani, Oxana Vasilievna Kharissova, Marco A. Jiménez, Arunachala M. Kannan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Application of tertiary alloy nanoparticles is becoming more important, however, the local structure of such alloyed particles, which is critical for tailoring their properties, is not yet very clearly understood. In this study, we present detailed theoretical analysis on the atomistic structure and CO adsorption in Pd70Co20X10 (X=Au, Mo, Ni) tertiary composite alloys for their application in fuel cells toward oxygen reduction reaction (ORR). Basic structure and the most stable configurations for all the three composites are determined. Quantum mechanical approaches and classic molecular dynamics methods are applied to model the structure and to determine the lowest energy configurations. Our theoretical results agree well with the experimental results of XRD patterns. Considering those structures as the base, simulations were performed to determine the magnitude of CO poisoning. The results obtained by ab-initio calculations allow us to estimate the CO-tolerance that these catalysts might have, along with those obtained for Pd-Co-Ni (70:20:10 atom %) tertiary alloy, and compared with commercial Pt (1 1 0) catalyst. From these results, a comparison has been made to show different CO adsorption strengths. This is the first step to fabricate an efficient engineering design that allows us to obtain high-performance, low-cost nanostructured catalysts. © 2010 John Wiley & Sons, Ltd.
Original languageEnglish
Pages (from-to)594-600
Number of pages7
JournalInternational Journal of Energy Research
DOIs
Publication statusPublished - 10 Jun 2011
Externally publishedYes

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Fuel cells
Adsorption
Catalysts
Composite materials
Molecular dynamics
Nanoparticles
Atoms
Oxygen
Costs

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Castañón, Mauricio Garza ; Velumani, S. ; Kharissova, Oxana Vasilievna ; Jiménez, Marco A. ; Kannan, Arunachala M. / CO adsorption in PdxCoyXz (X = Au, Mo, Ni) tertiary alloy nanocatalysts for PEM fuel cells-a theoretical analysis. In: International Journal of Energy Research. 2011 ; pp. 594-600.
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CO adsorption in PdxCoyXz (X = Au, Mo, Ni) tertiary alloy nanocatalysts for PEM fuel cells-a theoretical analysis. / Castañón, Mauricio Garza; Velumani, S.; Kharissova, Oxana Vasilievna; Jiménez, Marco A.; Kannan, Arunachala M.

In: International Journal of Energy Research, 10.06.2011, p. 594-600.

Research output: Contribution to journalArticle

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AU - Castañón, Mauricio Garza

AU - Velumani, S.

AU - Kharissova, Oxana Vasilievna

AU - Jiménez, Marco A.

AU - Kannan, Arunachala M.

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