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Solvent-free and rapid synthesis of mesoporous Pt-iron oxide catalysts via mechanochemical assembly

机译：无溶剂和快速合成介孔通过机械化学的Pt-iron氧化物催化剂组装

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Mesoporous FexOy and Pt@FexOy have demonstrated promising performance in catalysis. However, current methods usually use wet chemistry, which poses several drawbacks. In this study, we introduce a simple process of mechanochemical assembly between an iron salt and a triblock copolymer in the solid state that can not only directly form abundant mesopores into FexOy, but also enable a high dispersion of Pt species at the nm or sub-nm scale. In this regard, mesoporous FexOy and Pt@FexOy catalysts with high surface areas (up to 149 m(2) g(-1)) and narrow pore size distributions (similar to 5 nm) can be obtained in a solvent-free and rapid (0.5 h) way. The kinetic energy and frictional heating of ball milling are expected to promote the interaction and diffusion between iron precursors and surfactants, while the solvent-free feature confines their assembly to the mesophase of the P123 copolymer. Moreover, these Pt@FexOy catalysts provide good activity in the total oxidation of propylene and CO.
机译：介孔FexOy Pt@FexOy演示了有前途的催化性能。目前通常用湿化学方法,存在一些缺陷。介绍一个简单的机械化学的过程组装铁盐和triblock之间共聚物不仅可以在固态直接形成丰富的中孔到FexOy,但是也使Pt物种的高色散nm或sub-nm规模。介孔FexOy Pt@FexOy催化剂和高表面区域(最高可达149 m (2) g(1))和狭窄的孔隙大小分布(类似于5海里)在无溶剂和快速获得(0.5小时)。球的动能和摩擦加热铣削有望促进互动和铁前体和之间的扩散表面活性剂,无溶剂特性限制他们组装的中间相P123共聚物。催化剂提供良好的活动氧化丙烯和有限公司

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