| Ni_2P/介孔分子筛催化剂的原位漫反射红外光谱研究 |
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| 引用本文： | 刘倩倩,季生福,吴平易,胡林华,黄晓凡,朱吉钦,李成岳.Ni_2P/介孔分子筛催化剂的原位漫反射红外光谱研究[J].光谱学与光谱分析,2009,29(5):1227-1231. |
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| 作者姓名： | 刘倩倩 季生福 吴平易 胡林华 黄晓凡 朱吉钦 李成岳 |
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| 作者单位： | 1. 北京化工大学化工资源有效利用国家重点实验室,北京,100029
2. 清华大学化学系,北京,100084 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划) |
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| 摘 要： | 以介孔分子筛MCM-41,MCM-48,SBA-15,SBA-16为载体,硝酸镍为镍源,磷酸氢二铵为磷源,通过浸渍法制备了含有磷化镍前体的介孔分子筛样品,然后在氢气气氛中进行程序升温还原,得到了磷化镍/介孔分子筛催化剂.采用原位漫反射红外光谱法,用CO作为探针分子,对样品的吸附特征进行了研究.结果表明,在介孔分子筛表面CO存在着较弱的物理吸附.在Ni2P/MCM-41催化剂样品表面有四种CO的吸附态:(1)在2055cm-1处形成的Ni(CO)4物种的吸附,(2)在2 091cm-1处的配位不饱和Niδ(0<δ<1)物种上的吸附,(3)在2 127 cm-1处的Ni+物种上的吸附,(4)在2 198～2 202 cm-1范围内的P物种上的吸附.在Ni2P/MCM-48,Ni2P/SBA-15,Ni2P/SBAZ-16催化剂样品表面有二种CO的吸附态:在2 051～2 055cm-1处的Ni(CO)4吸附和在2 093～2 096 cm-1处的配位不饱和Niδ+(0<δ<1)物种上的吸附.
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| 关 键 词： | 磷化镍 介孔分子筛 一氧化碳 吸附 原位漫反射红外 |
| 收稿时间： | 2008/5/10 |
In Situ Diffuse Reflectance FTIR Spectroscopy Study of CO Adsorption on Ni_2P/Mesoporous Molecule Sieve Catalysts |
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| LIU Qian-qian,JI Sheng-fu,WU Ping-yi,HU Lin-hua,HUANG Xiao-fan,ZHU Ji-qin,LI Cheng-yue.In Situ Diffuse Reflectance FTIR Spectroscopy Study of CO Adsorption on Ni_2P/Mesoporous Molecule Sieve Catalysts[J].Spectroscopy and Spectral Analysis,2009,29(5):1227-1231. |
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| Authors: | LIU Qian-qian JI Sheng-fu WU Ping-yi HU Lin-hua HUANG Xiao-fan ZHU Ji-qin LI Cheng-yue |
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| Institution: | LIU Qian-qian1,JI Sheng-fu1,WU Ping-yi1,HU Lin-hua2,HUANG Xiao-fan1,ZHU Ji-qin1,LI Cheng-yue1 1.State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China 2.Department of Chemistry,Tsinghua University,Beijing 100084,China |
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| Abstract: | The supported nickel phosphate precursors were prepared by incipient wetness impregnation using nickel nitrate as nickel source,diammonium hydrogen phosphate as phosphorus source,and MCM-41,MCM-48,SBA-15 and SBA-16 as supports,respectively.Then,the supported Ni2P catalysts were prepared by temperature-programmed reduction in flowing H2 from their nickel phosphate precursors.The in situ diffuse reflectance FTIR spectroscopy(DRIFTS)analysis with the probe molecule CO was carried out to characterize the surfac... |
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| Keywords: | Nickel phosphide Mesoporous molecule sieve Carbon monoxide Adsorption DRIFTS |
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