用XRD ,BET ,NH3 TPD ,TPR及XPS等手段对CeO2 改性Pd/γ Al2 O3 催化剂的结构和性能进行了表征 ,并考察了催化剂上甲醇低温分解的性能 .结果表明 ,CeO2 在γ Al2 O3 载体上容易聚集 ,不能完全掩蔽其表面酸性 ,并较大程度地降低了载体的比表面积 ;CeO2 的加入促进了Pd在载体上的分散 ,并且产生一种协同还原作用 .Pd的高度分散及其与CeO2 在γ Al2 O3 上的相互作用是催化剂具有高活性的关键 The structure and performance of CeO2-modified Pd / γ Al2 O3 catalyst were characterized by XRD, BET, NH3 TPD, TPR and XPS, and the performance of the catalyst for the low temperature decomposition of methanol was investigated. The results showed that the molar ratio of CeO2 to γAl2O3 The carrier is easy to aggregate and can not completely mask the surface acidity and greatly reduce the specific surface area of ​​the carrier. The addition of CeO2 promotes the dispersion of Pd on the carrier and produces a synergistic reduction effect.Pd is highly dispersed and its The interaction with CeO2 on γ Al2 O3 is the key to the high activity of the catalyst