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Journal of Solid State Electrochemistry

, Volume 20, Issue 12, pp 3405–3414 | Cite as

Pt/C nanocatalysts for methanol electrooxidation prepared by water-in-oil microemulsion method

  • Mila N. Krstajić Pajić
  • Sanja I. Stevanović
  • Vuk V. Radmilović
  • Jelena R. Rogan
  • Velimir R. Radmilović
  • Snežana Lj. Gojković
  • Vladislava M. Jovanović
Original Paper

Abstract

Pt nanoparticles supported on Vulcan XC-72R were synthesized by water-in-oil microemulsion method. By incorporating different amounts of HCl as a capping agent in the precursor-containing water phase, nanoparticle shape was varied. Influencing the growth of certain facets leads to the changes of the particle shape depending on the preferential facets. As a result, nanoparticles exhibit some of the electrochemical features typical for single crystals. Commonly employed synthesis procedure for water-in-oil microemulsion method was altered with the addition of catalyst support in the system and changing the catalyst cleaning steps. Prepared catalysts were characterized by thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and electrochemical methods. Activity and stability for methanol oxidation reaction (MOR), a structure-sensitive reaction, were tested. Electrochemical results reveal the influence of particle size, shape and exposed facets on the electrochemical processes. TEM investigations confirm electrochemical findings, while TGA verifies Pt loading in catalyst powder. Based on the results, optimal HCl concentration for cubic particle formation is determined, and structural effect on MOR activity and stability was tested. Cuboidal NPs show very good reaction activity and fair stability under applied experimental conditions.

Keywords

Pt nanoparticles Microemulsion method Methanol electrooxidation Electrocatalysis Fuel cell 

Notes

Acknowledgments

This work was financially supported by the Ministry of Education, Science and Technological Development, Republic of Serbia, contracts No.172060. VRR acknowledges support by Serbian Academy of Sciences and Arts under contract No. F-141.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Mila N. Krstajić Pajić
    • 1
  • Sanja I. Stevanović
    • 1
  • Vuk V. Radmilović
    • 2
  • Jelena R. Rogan
    • 3
  • Velimir R. Radmilović
    • 3
    • 4
  • Snežana Lj. Gojković
    • 3
  • Vladislava M. Jovanović
    • 1
  1. 1.Centre for Electrochemistry, ICTMUniversity of BelgradeBelgradeSerbia
  2. 2.Innovation Center, Faculty of Technology and MetallurgyUniversity of BelgradeBelgradeSerbia
  3. 3.Faculty of Technology and MetallurgyUniversity of BelgradeBelgradeSerbia
  4. 4.Serbian Academy of Sciences and ArtsBelgradeSerbia

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