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    • Keywords


      MWCNT/Pd nanocomposite; laser-ablation; transmission electron microscopy; cyclic voltammetry; chronoamperometry.

    • Abstract


      Multi-walled carbon nanotubes (MWCNTs) were decorated with palladium nanoparticles (Pd NPs) by laserablationof a physical mixture of MWCNTs and Pd NPs without using any reducing agent. The morphology and composition of MWCNT/Pd were analysed by complementary techniques involving Fourier transform infrared spectrometry,transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. Using cyclic voltammetry and chronoamperometry, the electrocatalytic activity and stability of CNT/Pd were evaluated for the electrochemical oxidation of methanol in a basic medium. Comparative investigations were provided with laser-ablated Pd NPs (LA Pd) catalyst concerning catalytic activity and stability. MWCNT/Pd exhibited remarkably high catalytic activity (104.20 mA mg$^{-1}$) in comparison to the LA Pd catalyst (14.41 mA mg$^{-1}$). The catalyst was found to exhibit longterm stability even after 3600 s of operation and high resistance towards CO poisoning. It is suggested that the MWCNT/Pd would be valuable as an active electrocatalyst for its commercial applications in direct methanol fuel cells.

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    • Author Affiliations



      1. Nanomaterials and Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India
      2. Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India
      3. Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan
      4. School of Chemistry, University of Melbourne, Melbourne, Vic 3010, Australia
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