Restructuring of a heterogeneous catalyst under reaction conditions is a common phenomenon. Severe restructuring of a catalyst can result in deactivation in many catalytic systems—for example, the catalytic dehydrogenation of propane to propylene. Herein, we report the utilization of catalyst restructuring to improve activity and stability for the propane dehydrogenation reaction. A bimetallic platinum and zinc (Pt₁Zn_m) catalyst protected by an in situ restructured silicalite-1 zeolite is prepared. The catalyst yields outstanding activity (initial conversion of ∼69.2%, initial selectivity of ∼91.1%) with high stability at 580°C, which is better than several commercial catalysts. Characterization shows the singly dispersed bimetallic sites of Pt₁Zn_m serve as the catalytic sites during the reaction. Moreover, the less-stable silicalite-1 zeolite undergoes restructuring during the dehydrogenation reaction, forming a crucial protective layer on the Pt₁Zn_m bimetallic nanocatalysts.

在反应条件下重组非均相催化剂是一种常见现象。催化剂的严重重组会导致许多催化系统失活——例如，丙烷催化脱氢为丙烯。在此，我们报告了利用催化剂重组来提高丙烷脱氢反应的活性和稳定性。制备了由原位重组 silicalite-1 沸石保护的双金属铂和锌 (Pt ₁ Zn _m ) 催化剂。该催化剂在 580°C 下具有出色的活性（初始转化率约为 69.2%，初始选择性约为 91.1%）和高稳定性，优于多种商业催化剂。表征显示 Pt _{1的单分散双金属位点}Zn _m在反应过程中充当催化位点。此外，不太稳定的 silicalite-1 沸石在脱氢反应过程中进行重组，在 Pt ₁ Zn _m双金属纳米催化剂上形成关键的保护层。