一氧化碳氧化的钯－铈催化剂性能研究  

STUDY ON THE CATALYTIC PROPERTIES OF Pd Ce/Al 2O 3 FOR CARBON MONOXIDE OXIDATION

作　　者：戚建英[1] 杨启云[1] 李贤均[2] 

机构地区：[1]云南教育学院化学系 [2]四川大学

出　　处：《化学研究与应用》1996年第3期391-396,共6页Chemical Research and Application

摘　　要：用浸渍法制备了不同浓度的Ｐｄ－Ｃｅ／Ａｌ２Ｏ３催化剂，在固定床微反应器中测定了对ＣＯ催化氧化活性，并对催化剂作了ＸＲＤ、ＸＰＳ、氢氧滴定及ＩＲ表征。结果表明：Ｐｄ－Ｃｅ／Ａｌ２Ｏ３催化剂的活性低于Ｐｄ／Ａｌ２Ｏ３的原因是Ｃｅ组份的加入增强了催化剂对产物ＣＯ２的吸附作用，阻碍了反应物ＣＯ的吸附。然而，Ｃｅ组份的加入却能抑制Ｐｄ组份的烧结。A series of Pd Ce/Al 2O 3 catalysts with different metal concentrations were prepared by the method of impregnation.Their catalytic activities for CO oxidation were determined in a fixed bed microreactor.The catalysts were characterized by XRD、XPS、IR and H 2O 2 titration.The results showed that the catalytic activities for CO oxidation over Pd Ce/Al 2O 3 decreased with increasing the Ce content in the catalysts due to mainly that the CO adsorption site was occupied by CO 2 produced in the reaction, thus decreasing the ability of CO metathesis. Whereas the addition of Ce into Pd/Al 2O 3 inhibited remarkably the calcination of Pd.

关 键 词：氧化 一氧化碳 氧化铝 铈催化剂 钯催化剂 

分 类 号：O643.36[理学—物理化学] O613.71[理学—化学]