Pd catalysts loaded on P-doped alumina (Pd/Al₂O₃-xP) were prepared and applied to H₂O₂ production by means of anthraquinone hydrogenation. The catalytic performance over Pd/Al₂O₃-xP catalysts showed a volcano-shape trend with phosphorus content. Pd/Al₂O₃-1 P catalyst containing 1 wt% phosphorus exhibited the most excellent catalytic performance and reusability. The physicochemical properties of phosphorus-doped supports and Pd-loaded catalysts were investigated by several characterization methods. Doping phosphorus into Al₂O₃ increased thermal stability and adjusted surface acid intensity of the supports. Introducing suitable amount of phosphorus improved the Pd dispersion, regulated the reducibility of the catalysts. These factors contributed to the superior performance of Pd/Al₂O₃-1 P for the anthraquinone hydrogenation reaction. Furthermore, Pd/Al₂O₃ catalyst gradually deactivated during the recycle test, which was mainly attributed to Pd loss and byproduct deposition on the catalyst. Incorporation of phosphorus could enhance the anchoring effect between Pd nanoparticle and support, which could also inhibit the generation of byproducts.

制备了负载在掺P的氧化铝上的Pd催化剂（Pd / Al ₂ O ₃ - x P），并通过蒽醌加氢将其应用于H ₂ O _2的生产。在Pd / Al ₂ O ₃ - x P催化剂上的催化性能显示出具有磷含量的火山状趋势。含有1重量％的磷的Pd / Al ₂ O ₃ -1 P催化剂表现出最优异的催化性能和可重复使用性。通过几种表征方法研究了掺磷载体和载钯催化剂的理化性质。将磷掺杂到Al ₂ O _3中提高了热稳定性并调整了载体的表面酸强度。引入适量的磷改善了Pd的分散性，调节了催化剂的还原性。这些因素有助于Pd / Al ₂ O ₃ -1 P在蒽醌氢化反应中的优异性能。此外，Pd / Al ₂ O ₃催化剂在循环试验中逐渐失活，这主要归因于Pd的损失和副产物在催化剂上的沉积。磷的掺入可以增强Pd纳米颗粒与载体之间的锚固效果，也可以抑制副产物的生成。