Small angle X-ray scattering of Pt particle aggregation in Pt/C catalyst

Small angle X-ray scattering(SAXS) methods were employed to investigate the aggregations of Pt nanoparticles in three kinds of Pt/C catalysts produced by microwave heating process, soakage-reducing process and glycol synthesis process. The experimental results showed information of characteristic size, surface area and size distributions of Pt nanoparticles and aggregations in three catalysts. The TEM images are in agreement with SAXS conclusions. The investigation showed that the processes affected the characters of Pt nanoparticles and their aggregations in Pt/C catalyst differently. Pt particles produced by microwave heating process scatter uniformly on carbon supports, and have relatively a large surface and sharp size-distribution. Applying the soakage-reducing process and glycol synt