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Poly (pyrrole-co-aniline) hollow nanosphere supported Pd nanoflowers as high-performance catalyst for methanol electrooxidation in alkaline media

Author

Listed:
  • Fard, Leyla Abolghasemi
  • Ojani, Reza
  • Raoof, Jahan Bakhsh
  • Zare, Ehsan Nazarzadeh
  • Lakouraj, Moslem Mansour

Abstract

In this work, first poly (pyrrole-co-aniline) (PPCA) hollow nanosphere (HN) as a catalyst support material is fabricated through in-situ emulsion polymerization. Then we reported a one-step and template-free approach to fabricate Pd NFs on a PPCA HN coated glassy carbon electrode by a facile electrochemical approach. Several techniques such as FTIR (Fourier transform infrared spectroscopy), SEM (scanning electron microscopy) and EDS (energy dispersive spectroscopy) were utilized for the characterization of the synthesized materials. The catalytic performance of Pd NFs/PPCA HN catalyst is evaluated by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy toward methanol oxidation as a model reaction in alkaline media. The comparison of specific activities for Pd NFs/PPCA HN (1.79 mA cm−2), Pd NFs/PPy (1.28 mA cm−2), Pd NFs/PANI (0.93 mA cm−2) and Pd NFs (0.78 mA cm−2) shows that the PPCA supported Pd NFs with high surface area exhibits the excellent electrocatalytic activity than other electrodes for the electro-oxidation reaction in alkaline media. This might be due to the easier charge transfer at conductive copolymer interfaces, higher electrochemically accessible surface areas and electronic conductivity. This strategy provides a promising platform for direct methanol fuel cells.

Suggested Citation

  • Fard, Leyla Abolghasemi & Ojani, Reza & Raoof, Jahan Bakhsh & Zare, Ehsan Nazarzadeh & Lakouraj, Moslem Mansour, 2017. "Poly (pyrrole-co-aniline) hollow nanosphere supported Pd nanoflowers as high-performance catalyst for methanol electrooxidation in alkaline media," Energy, Elsevier, vol. 127(C), pages 419-427.
    • Handle: RePEc:eee:energy:v:127:y:2017:i:c:p:419-427
    DOI: 10.1016/j.energy.2017.03.159
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    References listed on IDEAS

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    1. Ojani, Reza & Hasheminejad, Ehteram & Raoof, Jahan Bakhsh, 2015. "Direct growth of 3D flower-like Pt nanostructures by a template-free electrochemical route as an efficient electrocatalyst for methanol oxidation reaction," Energy, Elsevier, vol. 90(P1), pages 1122-1131.
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