BaO enhances the thermal stability of Al 2O 3 significantly owing to the formation of BaAl 2O 4. The introduction of BaO in creases the activity of Pd/Al 2O 3 for CO oxidation, and increases the thermostability of catalysts to some extent.

• 复合载体在制备中发生固相反应 ；所生成的 Ba Al2 O4可以阻止 Al2 O3的相变 ；并极大地提高载体的热稳定性 ；其中 5%25 Ba O的作用最为明显 .；Ba O的引入；增强了 Pd/Al2 O3对 CO的氧化能力；同时；提高了其热稳定性