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Issue 33, 2009
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Structural evolution and electrocatalytic application of nitrogen-doped carbon shells synthesized by pyrolysis of near-monodisperse polyaniline nanospheres

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Abstract

Near-monodisperse polyaniline (PANI) colloids with controlled particle size (55–90 nm) were prepared by disperse polymerization of aniline in the presence of a steric stabilizer: polyvinylpyrrolidone (PVP). The silica-coated PANI colloidal nanospheres were further subjected to pyrolysis treatment at different temperatures (400–950 °C) to fabricate the nitrogen-doped carbon shells (NCSs). The NCSs so obtained were found to have controllable morphologies and pore sizes (13.4–23.2 nm). A possible structural evolution of the PANI colloids during pyrolysis process is proposed based on results obtained from a variety of characterization techniques. Upon loading Pt metal, the supported Pt/NCS catalysts were found to exhibit superior catalytic performance during electrooxidation of methanol, surpassing that of the conventional Pt/Vulcan XC-72 catalyst. The effects of nitrogen doping and carbon shell structure on Pt dispersion, tolerance of CO poisoning, and electrochemical properties are also examined and discussed.

Graphical abstract: Structural evolution and electrocatalytic application of nitrogen-doped carbon shells synthesized by pyrolysis of near-monodisperse polyaniline nanospheres

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Publication details

The article was received on 24 Apr 2009, accepted on 05 Jun 2009 and first published on 30 Jun 2009


Article type: Paper
DOI: 10.1039/B908223A
Citation: J. Mater. Chem., 2009,19, 5985-5995
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    Structural evolution and electrocatalytic application of nitrogen-doped carbon shells synthesized by pyrolysis of near-monodisperse polyaniline nanospheres

    Z. Lei, M. Zhao, L. Dang, L. An, M. Lu, A. Lo, N. Yu and S. Liu, J. Mater. Chem., 2009, 19, 5985
    DOI: 10.1039/B908223A

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