Abstract
Pd/tin oxide-titanium dioxide/multiwalled carbon nanotubes (Pd/SnO2–TiO2/MWCNT) have been synthesized according to a facile and controllable in situ chemical method and their performances in methanol and ethanol oxidation reactions evaluated. Transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analyses revealed the beneficial effects of the SnO2 component in the Pd/SnO2–TiO2/MWCNT, indicating that the metallic-state Pd nanoparticles were uniformly dispersed onto the SnO2–TiO2 precursor anchored onto the MWCNT. Electrochemical characterization techniques, including cyclic voltammetry (CV), chronoamperometry and electrochemical impedance spectroscopy (EIS) measurements were used to analyze the electrochemical performance of the Pd/SnO2–TiO2/MWCNT relative to Pd/MWCNT. The results revealed that the Pd/SnO2–TiO2/MWCNT provided excellent and superior levels of performance in terms of their electrocatalytic activity, electrochemical active surface (EAS), carbon monoxide (CO) tolerance and stability for both methanol and ethanol oxidation in alkaline solution.
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