Liquid metal (LM) with outstanding fluidity, excellent electrical and thermal conductivity is emerging in heterogeneous catalysis, such as Ga-based supported catalytically active liquid-metal solutions. However, liquid gallium droplets are prone to migration and aggregation, especially under high-temperature reaction conditions. Herein, we designed a liquid gallium-zeolite nanocomposite catalyst (L-Ga/S-1) by a simple and low-cost physical mixing method. In propane dehydrogenation, the optimized L-1.5-Ga/S-1 exhibited a high formation rate of 1.17 mol C₃H₆g_Ga^–1 h^–1, 13 times higher than that of 1.5-Ga-MFI, with a propylene selectivity of up to 95% at 550 °C. It could be ascribed to abundant interface GaO_x structure between Ga droplet and nanosized Silicalite-1 zeolite, which provided strong Lewis acidic sites to promote the selective scission of C–H bonds. Liquid metal–metal oxide nanocomposites offer an important way for controlling interface precisely in the sphere of heterogeneous catalysis.

中文翻译：

---

用于丙烷脱氢的液态镓-沸石纳米复合催化剂


具有出色流动性、优异导电性和导热性的液态金属（LM）在多相催化领域正在兴起，例如基于镓的负载催化活性液态金属溶液。然而，液态镓液滴容易发生迁移和聚集，特别是在高温反应条件下。在此，我们通过简单且低成本的物理混合方法设计了液态镓-沸石纳米复合催化剂（L-Ga/S-1）。在丙烷脱氢中，优化后的L-1.5-Ga/S-1表现出1.17 mol C ₃ H ₆ g _Ga ^–1 h ^–1 ，比1.5-Ga-MFI高13倍，550℃时丙烯选择性高达95%。这可能归因于Ga液滴和纳米Silicalite-1沸石之间存在丰富的界面GaO _x 结构，该结构提供了强路易斯酸性位点以促进C-H键的选择性断裂。液态金属-金属氧化物纳米复合材料为多相催化领域精确控制界面提供了重要途径。