K^+和Al^(3+)对锌-钴复合氧化物结构与催化性能的影响  

Effect of Adding K_+ and Al_(3+) on the Structure and Properties of Zn-Co Complex Oxides

作　　者：朱波[1] 袁贤鑫[1] 葛玉平[1] 金松寿 吕光烈[2] 吴红丽[2] 

机构地区：[1]杭州大学化学系,杭州310028 [2]杭州大学中心实验室,杭州310028

出　　处：《化学学报》1995年第4期349-352,共4页Acta Chimica Sinica

摘　　要：本文采用共沉淀法制备锌一钴复合氧化物,并添加K^+,Al^(3+)离子考察对其结构及性能的影响.XRD和Rietveld结构修正结果表明.K^+,Al^(3+)的掺入对锌-钴正尖晶石复合氧化物氧参数μ的影响呈相反趋势.通过H_2的TPR,TPD—MS和一氧化碳氧化反应实验对复合氧化物的催化氧化活性研究,发现K^+对催化剂的氧化活性有促进作用,而Al^(3+)则抑制其氧化活性,与氧参数的变化相对应.The Zn-Co complex oxides were prepared by the method of coprecipitation. The effect of adding K+ and Al3+ on these oxides was investigated. According to the Rietveld Structure Refinement of powder X-ray diffraction, it is found that the addition of K+ and A13+ produces opposite effect on the oxygen parameter of the spinels. The results of the TPR, TPD-MS and CO oxidation show that the addition of K+ promotes the catalytic oxidation activity of Zn-Co complex oxide, but A13+ refrains the catalytic oxidation activity. The influence of addition of K+ and Al3+ on the oxygen parameters may be related to the oxidation activities closely.

关 键 词：复合氧化物 结构 催化活性 锌 钴 钾 铝 

分 类 号：O643.361[理学—物理化学]