Fabrication and Performance of Polymer Electrolyte Fuel Cells by Self-Assembly of Pt Nanoparticles
Fabrication and Performance of Polymer Electrolyte Fuel Cells by Self-Assembly of Pt Nanoparticles
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DOI：
10.1149/1.1901103
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发表时间：
2005-06
影响因子：
3.9
通讯作者：
M. Pan;Haolin Tang;S. Jiang;Zengcai Liu
中科院分区：
文献类型：
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作者：
M. Pan;Haolin Tang;S. Jiang;Zengcai Liu
利用带电Pt纳米粒子成功制备了聚合物电解质燃料电池（PEFC）的自组装Pt纳米粒子电极和膜电极组装（MEA）。在离子型聚二烯基二甲基氯化铵（PDDA）和二烯基二甲基氯化铵（DDA）稳定剂的存在下，采用醇还原法制备了带电Pt纳米颗粒。带电荷的Pt纳米粒子可能通过磺酸功能位点SO - 3在Nafion膜表面自组装，制备了负载Pt为2.8′0.1 μg cm - 2的MEA。自组装MEA的性能为2.3 mW cm - 2，对应于每1g Pt的铂利用率为821 W。Pt- dda和Pt- pdda纳米颗粒对o2还原反应表现出显著的电化学催化活性。结果表明，自组装的Pt纳米颗粒能够形成Pt单层结构，这种单层结构可能为PEFC系统的基础研究提供有力的工具。
Self-assembled Pt nanoparticle electrode and membrane-electrode-assembly (MEA) of polymer electrolyte fuel cells (PEFC) have been successfully prepared by using charged Pt nanoparticles. The charged Pt nanoparticles were prepared by alcoholic reduction in the presence of ionic poly(diallyldimethylammonium chloride) (PDDA) and diallyldimethylammonium chloride (DDA) stabilizers. A MEA with Pt loading of 2.8 ′ 0.1 μg cm - 2 was fabricated by the self-assembly of the charged Pt nanoparticles to the Nafion membrane surface probably via the sulfonic acid function sites, SO - 3 . The performance of the self-assembled MEA was 2.3 mW cm - 2 , corresponding to a Pt utilization of 821 W per 1 g Pt. The Pt-DDA and Pt-PDDA nanoparticle showed significant electrochemical catalytic activity for the O 2 reduction reactions. The results show that the self-assembled Pt nanoparticles were able to form a Pt monolayer and such a monolayered structure could potentially offer a powerful tool in the fundamental studies in the PEFC systems.