Abstract
Direct formic acid fuel cells are a promising portable power-generating device, and the development of efficient anodic catalysts is essential for such a fuel cell. In this work Pt-Bi nanoparticles supported on micro-fabricated gold wire array substrate were synthesized using an electrochemical deposition method for formic acid oxidation in fuel cells. The surface morphology and element components of the Pt-Bi/Au nanoparticles were characterized, and the catalytic activities of the three Pt-Bi/Au nanoparticle electrodes with different Pt/Bi ratios for formic acid oxidation were evaluated. It was found that Pt4Bi96/Au had a much higher catalytic activity than Pt11Bi89/Au and Pt13Bi87/Au, and Pt4Bi96/Au exhibited a current density of 2.7 mA·cm−2, which was 27-times greater than that of Pt/Au. The electro-catalytic activity of the Pt-Bi/Au electrode for formic acid oxidation increased with the increasing Bi content, suggesting that it would be possible to achieve an efficient formic acid oxidation on the low Pt-loading. Therefore, the Pt-Bi/Au electrode offers a promising catalyst with a high activity for direct oxidation of formic acid in fuel cells.
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Li, SH., Zhao, Y., Chu, J. et al. A Pt-Bi bimetallic nanoparticle catalyst for direct electrooxidation of formic acid in fuel cells. Front. Environ. Sci. Eng. 7, 388–394 (2013). https://doi.org/10.1007/s11783-012-0475-y
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DOI: https://doi.org/10.1007/s11783-012-0475-y