摘要
以PVP为保护剂,乙醇(ER)、乙二醇(GR)和水合肼(HR)为还原剂制备了一系列Au-Pd/CeO2催化剂,考察了还原剂对甲醇部分氧化性能的影响,并运用XRD、TPD和TPR等手段对催化剂进行了表征。结果表明,Au-Pd/CeO2(ER)催化剂具有较大的比表面积,形成的AuxPdy量较多、粒径较小、分散度较高、活性组分与载体的相互作用较强,同时对甲醇的吸附量较大和吸附温度较低。因此,该催化剂具有较高的催化活性和氢气选择性以及较低的CO质量分数。
The PVP-stabilized Au-Pd/CeO2 bimetallic catalysts were prepared by CH3CH2OH（ER）, CH2OHCH2OH（GR） and N2H4·H2O（ HR ） reductants and their catalytic performance for partial oxidation of methanol was studied. XRD, TPR, TPD were used to characterize the catalysts. Comparing the Au-Pd/CeO2 （GR） and Au-Pd/CeO2 （HR） catalysts, Au-Pd/CeO2 （ER） catalyst showed higher methanol conversion, hydrogen selectivity and lower content of CO for partial oxidation of methanol reaction （POM）. Au-Pd/CeO2 （ER） catalyst had larger BET surface area, dispersion and CH3OH adsorption amount, stronger metal-support interaction , more AuxPdy alloy and smaller particles, which were all advantageous to the catalytic activity for the titled reaction.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2008年第3期332-337,共6页
Journal of Fuel Chemistry and Technology
基金
高等学校博士学科点专项研究基金(20040403001)
江西教育厅科技项目(GJJ08021)
