• RESHMA KAIMAL

      Articles written in Bulletin of Materials Science

    • Laser-assisted decoration of carbon nanotubes with palladium nanoparticles for application in electrochemical methanol oxidation

      RESHMA KAIMAL GAURAV KUMAR YOGESH DILLIBABU SASTIKUMAR JERRY J WU SAMBANDAM ANANDAN MUTHUPANDIAN ASHOKKUMAR

      More Details Abstract Fulltext PDF

      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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