Controlled size of nanoparticles and rational tuning of the composition could precisely and effectively change the catalytic properties of Pd-based materials, enhancing the electrocatalytic performance and stability. In this article, we reported a rapid and facile synthesis of reduced graphene oxide (RGO) nanosheet-supported alloys of bimetallic PdAg nanoparticles, which were directly prepared by using simultaneous ultrasonic probe irradiation method. The as-synthesized alloys of nanoparticles exhibit excellent electrocatalytic activities for ethanol oxidation and oxygen reduction reaction (ORR) in alkaline medium, including high mass (3138 mA mg−1 Pd) and specific (1.26 mA cm−2) activity on the basis of Pd mass in ethanol oxidation reaction, high electron transferred number (3.94), larger kinetic current density (5.05 mA cm−2), excellent CO tolerance, and long-term stability and durability. The physicochemical and electrochemical characterization of as-prepared electrocatalyst materials was studied by using various tools, such as FE-SEM, HR-TEM, XRD, XPS, FT-IR, CV, CA, EIS, CO-stripping, and LSV-RDE. The developed electrocatalyst is expected to open up a novel class of anode and cathode materials with excellent durability and stability for direct ethanol fuel cell.
Electrocatalysis – Springer Journals
Published: Jun 21, 2017
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