| CeO2上CO和CO2吸附表面体的红外光谱研究 |
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| 引用本文： | 伏义路,田扬超.CeO2上CO和CO2吸附表面体的红外光谱研究[J].中国科学技术大学学报,1989,19(4):462-468. |
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| 作者姓名： | 伏义路 田扬超 |
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| 作者单位： | 中国科学技术大学，中国科学技术大学，安徽大学 |
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| 摘 要： | 应用红外光谱技术研究了CO,CO_2等在氧化态和还原态CeO_2上表面吸附体的形成及反应,归属了所观察到的红外吸收带,证实在表面上存在HCO_3~-,HCOO~-,及两种不同键合方式的CO_3~(2-)等表面物种。观察到HCO_3~-有两种存在形式,一种在较高的温度下稳定,一种在较低温度下稳定。在不同温度下HCOO~-、CO_3~(2-)、HCO_3~-三种表面物种之间可相互转化,在氧化态样品上,CO最终氧化生成CO_2气体。
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| 关 键 词： | CO吸附 CO_2吸附 表面吸附体 表面红外光谱 |
Infrared Study of Surface Species of CO and CO_2 Adsorption on CeO_2 |
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| Fu Yilu,Tian Yangchao,Xiang Xiaoyi University of Science and Technology of China Anhui University.Infrared Study of Surface Species of CO and CO_2 Adsorption on CeO_2[J].Journal of University of Science and Technology of China,1989,19(4):462-468. |
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| Authors: | Fu Yilu Tian Yangchao Xiang Xiaoyi University of Science and Technology of China Anhui University |
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| Institution: | Fu Yilu;Tian Yangchao;Xiang Xiaoyi University of Science and Technology of China Anhui University |
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| Abstract: | The formation and reaction of surface species of CO and CO_2 adsorptionon oxidized and reduced CeO_2 amples were studied by infrared spectroscopy.The bands obtained were assigned. The HCO_3~-, HCOO~- and CO_3~2-) speciesexisted on the surface of samples. Two forms of HCO_3~- species were detected,one was stable at low emperature, the other was stable at high temperature.HCO_3~-, CO_3~(2-) and HCOO~- species could transform each ther at differenttemperature. It was observed that CO was oxidized to produce CO_2 gas on theoxidized sample. |
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| Keywords: | surface adsorption species CO adsorption CO_2 adsorption surface infrared spectroscopy |
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