Structured catalysts exhibit the advantages of high diffusion efficiency and low heat transfer resistance, which have attracted increasing attention to non‐adiabatic gas–solid process. However, the metal‐supported coating catalysts face the problems of weaker bond strength and severe sintering, especially under the conditions of large flow rate and high temperature. Herein, metal@Silicalite‐1 structured catalysts with high adhesion and thermal stability were successfully prepared by hydroxylating the substrate with anatase. Rich surface Ti‐OH significantly strengthened the adhesion stability of the zeolite coating. In propane dehydrogenation reaction, the optimized PtZn@S‐1‐15Ti showed a high specific activity of 49.6 molC3H6·molPt−1·s−1 with propylene selectivity above 99% at 600°C. The introduction of anatase accelerated the aggregation of silicon sources and induced nucleation with growth content of zeolite increased by 3.6 times. It breaks the inherent contradiction between high loading amount and strong binding ability of coated catalysts, which broadens the avenues for industrial applications.

中文翻译：

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锐钛矿增强型 PtZn@Silicalite-1 结构催化剂促进丙烷脱氢


结构化催化剂具有高扩散效率和低传热阻力等优点，这在非绝热气-固工艺中引起了越来越多的关注。然而，金属负载涂料催化剂面临粘结强度较弱和烧结严重等问题，尤其是在大流速和高温条件下。在此，通过用锐钛矿对基材进行羟基化，成功制备了具有高粘附力和热稳定性的 metal@Silicalite-1 结构化催化剂。丰富的表面 Ti-OH 显着增强了沸石涂层的粘附稳定性。在丙烷脱氢反应中，优化的 PtZn@S-1-15Ti 显示出 49.6 molC3H6·molPt-1·s-1 的高比活性，在 600°C 时丙烯选择性超过 99%。 锐钛矿的引入加速了硅源的聚集并诱导成核，沸石的生长含量增加了 3.6 倍。它打破了包覆催化剂高负载量和强结合能力之间的固有矛盾，拓宽了工业应用的途径。