Study for the practical use of shape controlled nanoparticles

催化活性强烈依赖于催化剂表面的原子结构。形状可控的纳米粒子表面由活性结构组成，可以减少燃料电池中铂的负载量。然而，形状可控粒子表面原子的溶解显著降低了催化活性。研究了利用矩形波势脉冲再现表面结构的方法。在电势脉冲作用下，氧还原反应(ORR)的活性结构(110)面被构筑在立方和立方八面体的铂颗粒上。电势脉冲提高了铂颗粒的ORR活性。

The catalytic activity strongly depends on the atomic structure of the catalyst surface. Shape-controlled nano-particles, of which surfaces are composed of active structures, can reduce the amount of Pt loading in fuel cell. However, the dissolution of surface atoms of shape-controlled particles reduces the catalytic activities remarkably. Reproduction method of surface structure was investigated using rectangular wave potential pulse. The (110) facet, the active structure for the oxygen reduction reaction (ORR), was constructed on the cubic and cuboctahedral Pt particles by the potential pulse. The ORR activity of Pt particles was improved by the potential pulse.