Abstract
AbstractA novel composite catalyst of Pd nanoparticles supported on 1,6‐hexanediamine‐functionalized reduced graphene oxide (HD‐RGO) has been successfully synthesized by a facile chemical method. The as‐synthesized composite catalyst has been extensively characterized by Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, and electrochemical tests. TEM images show that Pd nanoparticles with smaller diameters of (3.30±1.20) nm are more evenly dispersed on the HD‐RGO surface than those supported on RGO. Electrochemical tests reveal that the as‐prepared Pd/HD‐RGO catalyst displays higher electrocatalytic activity, better tolerance, and better electrochemical stability toward ethanol oxidation in alkaline media in comparison with Pd/RGO and commercial Pd/C catalysts. The Pd/HD‐RGO catalyst may be a promising potential catalyst in direct ethanol fuel cells.
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