| 固体（NH_4）_2SO_4－Fe_2O_3体系的IR和XPS研究 |
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| 引用本文： | 魏长平,魏诠,王颖,杨胥薇,魏乃香,张武阳,李荣生. 固体（NH_4）_2SO_4－Fe_2O_3体系的IR和XPS研究[J]. 东北师大学报(自然科学版), 1994, 0(3) |
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| 作者姓名： | 魏长平 魏诠 王颖 杨胥薇 魏乃香 张武阳 李荣生 |
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| 作者单位： | 吉林大学化学系，吉林工学院 |
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| 摘 要： | 用红外光谱（ＩＲ）和Ｘ射线光电子能谱（ＸＰＳ）对用研磨法制得的（ＮＨ４）２ＳＯ４－Ｆｅ２Ｏ３样品进行了表征。并将表征结果与其催化性能关联。研究结果表明，热处理时存在着（ＮＨ４）２ＳＯ４在Ｆｅ２Ｏ３表面上自发分散过程。同时在表面形成Ｓ－Ｆｅ配合物。随着处理温度的升高，表面Ｓ－Ｆｅ配合物含量逐步增大，５７３Ｋ时达极大值。此时催化反应活性最大。超过５７３Ｋ，随着处理温度升高，表面Ｓ－Ｆｅ配合物分解，此时催化反应活性也相应降低。
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| 关 键 词： | 硫助金属氧化物，表面配合物，酸性，催化活性 |
IR And XPS Research of Solid(NH_4)_2SO_4-Fe_2O_3 Systems |
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| Wei Changping,Wei Quan,Wang Ying,Yang Xuwei,Wei Naixiang,Zhang Wuyang ,Li Rongsheng. IR And XPS Research of Solid(NH_4)_2SO_4-Fe_2O_3 Systems[J]. Journal of Northeast Normal University (Natural Science Edition), 1994, 0(3) |
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| Authors: | Wei Changping Wei Quan Wang Ying Yang Xuwei Wei Naixiang Zhang Wuyang Li Rongsheng |
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| Abstract: | When treating(NH4 )2SO4-Fe2O3 Systems below 573K,(NH4)2SO4 can gradually disperse on the surface of Fe2O3 with increasing temperature.Simultaneously,a part of(NH4)2SO4 decomposes,and the sulfate ion interacts with the surface of Fe2O3 to form a surface sulfato complex of Fe involved in the sites responsible for the acidic and catalytic properties of sulfate promoted iron oxide.Above 573K the surface sulfato compler will gradually decompose with further increasing temperature. |
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| Keywords: | sulfate promoted metal oxides surface complex acidic properties catalytic properties |
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