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化学学报
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化学学报 ›› 1995, Vol. 53 ›› Issue (4): 349-352. 上一篇    下一篇

研究论文

K^+和Al^3^+对锌-钴复合氧化物结构与催化性能的影响

朱波;袁贤鑫;葛玉平;金松寿;吕光烈;吴红丽   

  1. 杭州大学化学系;杭州大学中心实验室
  • 发布日期:1995-04-15

Effect of adding K^+ and Al^3^+ on the structure and properties of Zn-Co complex oxides

ZHU BO;YUAN XIANXIN;GE YUPING;JIN SONGSHOU;LU GUANGLIE;WU HONGLI   

  • Published:1995-04-15

PDF

438

本文采用共沉淀法制备锌-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。

关键词: 催化剂, 钾离子, 铝离子, 复氧化物, 催化活性

The Zn-Co complex oxides were prepared by the method of coprecipitation. The effect of adding K^+ and Al^3^+ 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 Al^3^+ 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 Al^3^+ refrains the catalytic oxidation activity. The influence of addition of K^+ and Al^3^+ on the oxygen parameters may be related to the oxidation activities closely.

Key words: CATALYST, POTASSIUM ION, ALUMINIUM ION, DOUBLE OXIDE, CATALYTIC ACTIVITY

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