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.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1995年第4期349-352,共4页
Acta Chimica Sinica
