负载型Pd-CuO/γ-Al_2O_3双金属催化剂上O_2-TPD-MS的特性

O_2TPDMS Properties of Supported PdCuO/γAl_2O_3 Bimetallic Catalysts

运用ＸＲＤ、ＴＰＤ－ＭＳ及色谱－微反流动法等手段，研究了Ｐｄ－ＣｕＯ／γ－Ａｌ２Ｏ３双金属催化剂物相结构、表面氧性能及对催化活性的影响。结果表明，双金属催化剂中由于Ｐｄ－ＣｕＯ间的相互作用，使催化剂活性组份的表面分散状态发生了变化。研究还表明不同的Ｐｄ／ＣｕＯ比对ＣＯ和ＣＨ４的氧化具有不同的活性，可通过调变活性组份含量比，改善催化剂上氧的吸、脱附行为，从而起到提高活性的作用。

RD,TPDMS and a microreactorGC system were used to study the reducibility, surface oxygen desorption and recovery ability of PdCuO/γAl_2O_3 bimetallic catalystsExperimental results show that due to the interaction between Pd and CuO in the bimetallic catalyst,the surface dispersion state of the active component has changed a great deal.In addition,different Pd/CuO ratio has different oxidation activity for the oxidation of CO and CH_4By adjusting and changing the ratio of active component,it is possible to improve the surface oxygen desorption and recovery ability of catalysts,thereby increase the catalytic oxidation activity