A Pt-Bi bimetallic nanoparticle catalyst for direct electrooxidation of formic acid in fuel cells

作者：Li, Shu-Hong; Zhao, Yue; Chu, Jian; Li, Wen-Wei; Yu, Han-Qing^*; Liu, Gang; Tian, Yang-Chao

来源：Frontiers of Environmental Science and Engineering, 2013, 7(3): 388-394.

DOI：10.1007/s11783-012-0475-y

• catalyst
• electrochemical deposition
• formic acid oxidation
• fuel cell
• gold wire array
• microfabrication

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 center dot 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.

• 出版日期2013-6
• 单位中国科学技术大学