Université de Poitiers, IC2MP, UMR CNRS no. 7285, Poitiers 86022, France.
Langmuir. 2012 Dec 21;28(51):17832-40. doi: 10.1021/la303588t. Epub 2012 Dec 12.
A nanocomposite material consisting of platinum nanoparticles surrounded by an ionic conducting polymer dispersed on carbon Vulcan XC72 was synthesized. The aim of this nanocomposite material is to translate the triple-phase boundary to a molecular level in electrochemical systems involving a polymer electrolyte. The ionic conducting polymer is a poly(styrenesulfonic acid) (PSSA, or PSSNa in its sodium form) synthesized by atom-transfer radical polymerization. The polymer has a terminal thiol group to ensure bonding with platinum nanoparticles. The nanocomposite material (Pt-PSSA/C) exhibited thermal stability up to 160 °C and electrochemical stability up to 1 V versus RHE. Compared to a Pt/C catalyst, the nanocomposite catalyst has a lower active surface area but comparable catalytic activity for the oxygen reduction reaction. Furthermore, this nanocomposite material exhibits similar behavior in a fuel cell active layer without Nafion as a classical Pt/C catalyst with Nafion included in the active layer.
一种由铂纳米粒子组成的纳米复合材料，周围是分散在碳 Vulcan XC72 上的离子导电聚合物。这种纳米复合材料的目的是将三相界面转化为涉及聚合物电解质的电化学系统中的分子水平。离子导电聚合物是一种通过原子转移自由基聚合合成的聚苯乙烯磺酸（PSSA，或其钠盐形式 PSSNa）。聚合物具有末端巯基基团，以确保与铂纳米粒子结合。纳米复合材料（Pt-PSSA/C）表现出高达 160°C 的热稳定性和高达 1V 相对于 RHE 的电化学稳定性。与 Pt/C 催化剂相比，纳米复合材料催化剂的活性表面积较低，但对氧还原反应具有相当的催化活性。此外，这种纳米复合材料在没有 Nafion 的燃料电池活性层中表现出与包含在活性层中的经典 Pt/C 催化剂 Nafion 相似的行为。
