The addition of sulfur to supported Pt catalysts often regulates Pt defect sites causing side reactions, where the interaction between Pt and sulfur depends on catalyst preparation methods. Herein, we report the solvent-deficient precipitation (SDP) to afford mesoporous sulfur-decorated Pt–Al₂O₃ catalysts with different sulfur contents. In the dehydrogenation of perhydro benzyltoluenes, the degree of dehydrogenation shows the volcano-shaped dependence on the sulfur content at the maximum with 0.21 wt% sulfur. The best performance catalyst is robust in recycle runs owing to negligible Pt growth and sulfur loss. The sulfur added lowers the electron density of Pt atoms because of the favorable contact between Pt and sulfur species by the SDP method compared to the conventional impregnation. The electron-deficient Pt atoms weaken the adsorption of aromatic products and induce appropriate H₂ adsorption. Thus, the titled catalyst is tolerant to the dehydrogenation products and less selective to the side product methylfluorene.

在负载型 Pt 催化剂中添加硫通常会调节导致副反应的 Pt 缺陷位点，其中 Pt 和硫之间的相互作用取决于催化剂的制备方法。在此，我们报告了溶剂不足沉淀 (SDP) 以提供介孔硫修饰的 Pt-Al ₂ O ₃不同硫含量的催化剂。在全氢苄基甲苯的脱氢中，脱氢程度在硫含量为 0.21 wt% 时表现出对硫含量的最大依赖性。由于 Pt 生长和硫损失可忽略不计，因此性能最佳的催化剂在循环运行中表现强劲。与常规浸渍相比，通过 SDP 方法添加的硫降低了 Pt 原子的电子密度，因为 Pt 和硫物质之间有良好的接触。缺电子的Pt原子削弱了芳烃产物的吸附并诱导了适当的H ₂吸附。因此，标题催化剂对脱氢产物具有耐受性，而对副产物甲基芴的选择性较低。