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	Ni_2P/介孔分子筛催化剂的原位漫反射红外光谱研究
	刘倩倩 ; 季生福 ; 吴平易 ; 胡林华 ; 黄晓凡 ; 朱吉钦 ; 李成岳 ; LIU Qian-qian ; JI Sheng-fu ; WU Ping-yi ; HU Lin-hua ; HUANG Xiao-fan ; ZHU Ji-qin ; LI Cheng-yue
	2010-06-10 ; 2010-06-10
关键词	磷化镍 介孔分子筛 一氧化碳 吸附 原位漫反射红外 Nickel phosphide Mesoporous molecule sieve Carbon monoxide Adsorption DRIFTS O643.36
其他题名	In Situ Diffuse Reflectance FTIR Spectroscopy Study of CO Adsorption on Ni_2P/Mesoporous Molecule Sieve Catalysts
中文摘要	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2091cm-1处的配位不饱和Niδ+(0<δ<1)物种上的吸附,(3)在2127cm-1处的Ni+物种上的吸附,(4)在2198～2202cm-1范围内的P物种上的吸附。在Ni2P/MCM-48,Ni2P/SBA-15,Ni2P/SBA-16催化剂样品表面有二种CO的吸附态:在2051～2055cm-1处的Ni(CO)4吸附和在2093～2096cm-1处的配位不饱和Niδ+(0<δ<1)物种上的吸附。; 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 surface properties.The results indicated that there were significant differences in the spectral features of the samples.The νCO absorbances observed for adsorbed CO on mesoporous molecule sieve was attributed to weak physical adsorption.There are four different kinds of νCO absorbances observed for adsorbed CO on Ni2P/MCM-41 catalyst with the following assignments:(1)the formation of Ni(CO)4 at 2 055 cm-1.(2)CO terminally bonded to cus Niδ+(0<δ<1)sites at 2 091 cm-1.(3)CO terminally bonded to Ni+ sites at 2 127 cm-1.(4) CO terminally bonded to P and form PC O between 2 198 and 2 202 cm-1.There are two different kinds of νCO absorbances observed for adsorbed CO on Ni2P/MCM-48,Ni2P/SBA-15 and Ni2P/SBA-16 catalysts.The absorbance observed at 2 051-2 055 cm-1 for CO adsorption on Ni2P/MCM-48,Ni2P/SBA-15 and Ni2P/SBA-16 catalysts is due to the formation of Ni(CO)4 species.The other νCO absorbances observed at 2 093-2 096 cm-1 was attributed to CO terminally bonded to cus Niδ+(0<δ<1)sites.; 国家自然科学基金项目(20473009); 国家“973”计划项目(2006CB202503)资助
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/61047]
专题	清华大学
推荐引用方式 GB/T 7714	刘倩倩,季生福,吴平易,等. Ni_2P/介孔分子筛催化剂的原位漫反射红外光谱研究[J],2010, 2010.
APA	刘倩倩.,季生福.,吴平易.,胡林华.,黄晓凡.,...&LI Cheng-yue.(2010).Ni_2P/介孔分子筛催化剂的原位漫反射红外光谱研究..
MLA	刘倩倩,et al."Ni_2P/介孔分子筛催化剂的原位漫反射红外光谱研究".(2010).

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