Au-Pd/ZnO-CeO_2催化剂甲醇部分氧化制氢性能的研究  

Hydrogen Production by Partial Oxidation of Methanol over Au-Pd/ZnO-CeO_2 Catalyst

作　　者：王建鑫[1] 罗来涛[1] 陈丽[1] 

机构地区：[1]南昌大学应用化学研究所,江西南昌330031

出　　处：《稀土》2009年第6期12-17,共6页Chinese Rare Earths

基　　金：江西教育厅科技基金(GJJ08021);高等学校博士学科点专项研究基金(20040403001)

摘　　要：采用聚合物保护乙醇还原法制备了Au-Pd/ZnO-CeO2催化剂,考察了CeO2对Au-Pd/ZnO催化剂甲醇部分氧化制氢反应性能的影响,并运用BET、XRD、TPR、H2-TPD和CH3OH-TPD等手段对催化剂进行了表征。结果表明,CeO2对Au-Pd/ZnO催化剂具有较好的改性效果,CeO2的引入能提高Au-Pd/ZnO催化剂的活性和氢气的选择性,归结于CeO2的加入增加了催化剂的比表面积、分散度和对反应物甲醇的吸附,同时减少了对生成物H2脱附,这些均有利于甲醇部分氧化制氢反应。The Au-Pd catalysts were prepared by PVP-stabilized reduction method by C2H5OH.The effects of CeO2 on the catalytic performance of Au-Pd/ZnO catalyst for partial oxidation of methanol were studied.BET,XRD,TPR,H2-TPD and CH3OH-TPD were used to characterize the catalysts.The results show that the addition of CeO2 could improve the activity and hydrogen selectivity of the Au-Pd/ZnO catalyst for partial oxidation of methanol.The Au-Pd/ZnO-CeO2 catalyst exhibits higher hydrogen selectivity compared to Au-Pd/ZnO catalyst.The enhanced activity of Au-Pd/ZnO-CeO2 catalyst was due to the addition of CeO2 which could improve the dispersion of the Au2O3,PdO and AuxPdyO on the support,increase the adsorption of Au-Pd/ZnO catalyst for methanol,and reduce the desorption of the catalyst for hydrogen,all these were advantageous to the enhancement of activity.

关 键 词：Au-Pd催化剂 CEO2 复合载体 甲醇部分氧化 制氢 

分 类 号：O643.3[理学—物理化学] O614.33[理学—化学]