| 氧化物催化剂表面过剩氧与氧化活性 |
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| 引用本文： | 罗孟飞,朱波.氧化物催化剂表面过剩氧与氧化活性[J].科技通报,1995,11(5):272-275. |
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| 作者姓名： | 罗孟飞 朱波 |
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| 作者单位： | 杭州大学催化研究所 |
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| 摘 要： | 本文采用肼法测定了金属氧化物催化剂表面过剩氧的浓度，并考察了吡啶的氧化活性。催化剂的氧化活性与表面氧浓度成正比。氧化活性和表面氧浓度的顺序为：Ｃｕ－Ｏ／Ａｌ＿２Ｏ＿３＞Ｍｎ－Ｏ／Ａｌ＿２Ｏ＿３＞Ｃｒ－Ｏ／Ａｌ＿２Ｏ＿３＞Ｆｅ－Ｏ／Ａｌ＿２Ｏ＿３≥Ｃｏ－Ｏ／Ａｌ＿２Ｏ＿３＞Ｎｉ－Ｏ／Ａｌ＿２Ｏ＿３＞Ｃｅ－Ｏ／Ａｌ＿２Ｏ＿３．随着催化剂焙烧温度的提高，催化剂表面氧浓度和氧化活性均下降。Ｃｕ－Ｏ／ＳｉＯ＿２催化剂中添加ＣｅＯ＿２后，催化剂表面氧浓度和氧化活性均有明显提高，同时催化剂的热稳定性也明显增加。
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| 关 键 词： | 催化剂 表面过剩氧 氧化活性 金属氧化物 |
The Amount of surface Excess Oxygen of the Oxide Catalyst and their Oxidation Activity |
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| Luo Mengfei,Zhu Bo,Zhou Bi,Yuanxin.The Amount of surface Excess Oxygen of the Oxide Catalyst and their Oxidation Activity[J].Bulletin of Science and Technology,1995,11(5):272-275. |
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| Authors: | Luo Mengfei Zhu Bo Zhou Bi Yuanxin |
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| Abstract: | In this paper,the surface oxygen concentration of the metal oxide catalysts was determined by themethod of the hydrazine as reductive agent and the activitv of pyridine oxidation was studied. A good relativi-ty between the catalytic oxidation activity and the excess amount of surface oxygen over the catalyst was ob-served.The oxidation activity of the catalysts is proportional to the excess amount of surface oxygen,Theorder of oxidation activity and surface excess oxygen determined is:As the calcination ternperature rises,the surfaceoxygen concentration and activity of catalysts descendes.The addition of CeO_2 caused an increase in the sur-face oxygen concentration and the oxidation activity,and the thermal stability of Cu-O/Al_2O_3 catalyst. |
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| Keywords: | oxide catalyst surface oxygen oxidation activity |
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