期刊
ELECTROCATALYSIS
卷 8, 期 5, 页码 430-441出版社
SPRINGER
DOI: 10.1007/s12678-017-0391-9
关键词
Reduced graphene oxide; PdAg alloys; Ethanol oxidation; Oxygen reduction reaction; Fuel cell
资金
- Ministry of Science and Technology (MOST), Taiwan [NSC-102-2923035-001-MY3]
- Department of Science and Technology, India under the Taiwan-India collaborative research grant [GITA/DST/TWN/P-50/2013]
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.
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