Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University , 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan.
Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember , Kampus ITS Sukolilo, Surabaya 60111, Indonesia.
ACS Appl Mater Interfaces. 2017 Jul 19;9(28):23792-23799. doi: 10.1021/acsami.7b05873. Epub 2017 Jul 5.
Proton exchange membrane fuel cells require electrocatalysts with a high platinum (Pt) loading, large active surface area, and favorable hydrodynamic profile for practical applications. Here, we report the design of three-dimensional hierarchical bimodal macroporous carbon nanospheres with an interconnected pore system, which are applied as an electrocatalyst support. Carbon-supported Pt (Pt/C) catalysts were prepared by aerosol spray pyrolysis followed by microwave chemical deposition. The hierarchical porous structures not only increased the dispersion of Pt nanoparticles but also improved catalytic performance. A hierarchical bimodal macroporous Pt/C catalyst with a mixture of 30 and 120 nm size pores showed the best performance. The electrochemical surface area and mass activity values of this support were 96 m g-Pt and 378 mA mg-Pt, respectively at a Pt loading of 15 wt %.
质子交换膜燃料电池需要电催化剂具有高铂（Pt）负载、大的活性表面积和有利的流体动力学轮廓，以实现实际应用。在这里，我们报告了具有互联孔系统的三维分级双模态大孔碳纳米球的设计，将其用作电催化剂载体。通过气溶胶喷雾热解法和微波化学沉积制备了负载在碳上的 Pt（Pt/C）催化剂。分级多孔结构不仅增加了 Pt 纳米粒子的分散性，而且提高了催化性能。具有 30nm 和 120nm 尺寸孔混合的分级双模态大孔 Pt/C 催化剂表现出最佳性能。在 Pt 负载量为 15wt%时，该载体的电化学表面积和质量活性值分别为 96m^2g^-Pt 和 378mAmg^-Pt。
