Rapid synthesis of platinum-ruthenium bimetallic nanoparticles dispersed on carbon support as improved electrocatalysts for ethanol oxidation.

Author(s) Gu, Z.; Li, S.; Xiong, Z.; Xu, H.; Gao, F.; Du, Y.
Journal J Colloid Interface Sci
Date Published 2018 Jul 01

Bimetallic nanocatalysts with small particle size benefit from markedly enhanced electrocatalytic activity and stability during small molecule oxidation. Herein, we report a facile method to synthesize binary Pt-Ru nanoparticles dispersed on a carbon support at an optimum temperature. Because of its monodispersed nanostructure, synergistic effects were observed between Pt and Ru and the PtRu/C electrocatalysts showed remarkably enhanced electrocatalytic activity towards ethanol oxidation. The peak current density of the PtRu/C electrocatalyst is 3731 mA mg, which is 9.3 times higher than that of commercial Pt/C (401 mA mg). Furthermore, the synthesized PtRu/C catalyst exhibited higher stability during ethanol oxidation in an alkaline medium and maintained a significantly higher current density after successive cyclic voltammograms (CVs) of 500 cycles than commercial Pt/C. Our work highlights the significance of the reaction temperature during electrocatalyst synthesis, leading to enhanced catalytic performance towards ethanol oxidation. The PtRu/C electrocatalyst has great potential for application in direct ethanol fuel cells.

DOI 10.1016/j.jcis.2018.03.035
ISSN 1095-7103
Citation J Colloid Interface Sci. 2018;521:111118.

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