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Characterization of Porous Pt/Al_2O_3 Films Produced by Hybrid Gas-to-Particle Conversion and Chemical Vapor Deposition

机译:杂交气体 - 颗粒转化和化学气相沉积产生多孔Pt / Al_2O_3薄膜的表征

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A hybrid process, based upon gas-to-particle conversion and chemical vapor deposition, is presented as an alternative technique for producing porous films with the main advantage of solvent-free, low-substrate temperature operation. Starting from precursors of platinum acetylacetonate and aluminum acetylacetonate, nanoparticles were produced by chemical reaction followed by gas-to-particle conversion. Downstream of this reaction zone, these nanoparticles were collected via thermophoresis onto a cooled substrate forming a porous, nanocermet film that may have possible uses in catalytic, sensor, or coating applications. In this study, Pt/Alumina nanocermet films were produced by two routes: either simultaneous precursor injection processing or a layer-by-layer approach. Energy-dispersive X-ray spectroscopy revealed that this hybrid process results in reasonable control of the amount of Pt within each sample. From transmission electron spectroscopy images taken of films produced by simultaneous processing, Pt nanoparticles appear to be co-agglomerated with alumina. The results may identify changes that can be made to the process to improve properties, such as catalytic activity, in the nanocermet films.
机译:将基于气体到颗粒转化和化学气相沉积的杂化方法作为用于生产多孔膜的替代技术,其具有无溶剂,低衬底温度操作的主要优点。从乙酰乙酰丙酯和乙酰丙酮铝的前体开始,通过化学反应,然后通过化学反应制备纳米颗粒。在该反应区的下游,将这些纳米颗粒通过热孔收集到形成多孔的纳米膜膜的冷却基板上,该膜在催化剂,传感器或涂料应用中可能具有可能用途。在该研究中,Pt /氧化铝纳米细胞膜由两条途径产生:同时前体注射处理或逐层方法。能量分散X射线光谱显示,该杂合过程导致合理地控制每个样品内的PT量。根据通过同时处理产生的薄膜的透射电子光谱图像,Pt纳米粒子似乎与氧化铝共聚。结果可以鉴定可以对纳米细微膜膜中改善催化活性等性质,例如催化活性的过程的变化。

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