Cr掺杂对中孔MgF2酸性及孔结构的影响

采用共沉淀法制备了MgF2,CrF3与不同Cr含量的Cr(x)-MgF2样品,采用X射线粉末衍射、N2物理吸附-脱附、透射电镜、吡啶吸附的傅里叶变换红外光谱和NH3程序升温脱附等手段对样品的晶相结构、孔结构及表面性质进行了表征,并运用CHClF2的歧化反应评价了它们的催化活性.结果发现,Cr物种以无定形的形式掺杂在MgF2中,抑制了其晶粒的长大,使得MgF2的比表面积增加,孔径减小,并增强了其表面酸性.Cr掺杂的MgF2在CHClF2的歧化反应中具有优异的催化性能....

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Published in	催化学报 Vol. 34; no. 2; pp. 373 - 378
Main Author	牛怀成李利春李瑛郭荔唐浩东韩文锋刘化章
Format	Journal Article
Language	Chinese
Published	浙江工业大学工业催化研究所,浙江杭州,310032%浙江省化工研究院有限公司,浙江杭州,310023 2013
Subjects	中孔氟化镁二氟一氯甲烷共沉淀法歧化反应氟化铬 chromium fluoride 歧化反应 mesoporous magnesium fluoride 中孔氟化镁氟化铬 monochlorodifluoromethane disproportionation 共沉淀法二氟一氯甲烷 co-precipitation
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ISSN	0253-9837 1872-2067
DOI	10.3724/SP.J.1088.2013.20854

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Abstract	采用共沉淀法制备了MgF2,CrF3与不同Cr含量的Cr(x)-MgF2样品,采用X射线粉末衍射、N2物理吸附-脱附、透射电镜、吡啶吸附的傅里叶变换红外光谱和NH3程序升温脱附等手段对样品的晶相结构、孔结构及表面性质进行了表征,并运用CHClF2的歧化反应评价了它们的催化活性.结果发现,Cr物种以无定形的形式掺杂在MgF2中,抑制了其晶粒的长大,使得MgF2的比表面积增加,孔径减小,并增强了其表面酸性.Cr掺杂的MgF2在CHClF2的歧化反应中具有优异的催化性能.
AbstractList	采用共沉淀法制备了MgF2,CrF3与不同Cr含量的Cr(x)-MgF2样品,采用X射线粉末衍射、N2物理吸附-脱附、透射电镜、吡啶吸附的傅里叶变换红外光谱和NH3程序升温脱附等手段对样品的晶相结构、孔结构及表面性质进行了表征,并运用CHClF2的歧化反应评价了它们的催化活性.结果发现,Cr物种以无定形的形式掺杂在MgF2中,抑制了其晶粒的长大,使得MgF2的比表面积增加,孔径减小,并增强了其表面酸性.Cr掺杂的MgF2在CHClF2的歧化反应中具有优异的催化性能.
Author	牛怀成李利春李瑛郭荔唐浩东韩文锋刘化章
AuthorAffiliation	浙江工业大学工业催化研究所浙江省化工研究院有限公司
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Author_FL	HAN Wenfeng LIU Huazhang LI Ying GUO Li NIU Huaicheng LI Lichun TANG Haodong
Author_FL_xml	– sequence: 1 fullname: NIU Huaicheng – sequence: 2 fullname: LI Lichun – sequence: 3 fullname: LI Ying – sequence: 4 fullname: GUO Li – sequence: 5 fullname: TANG Haodong – sequence: 6 fullname: HAN Wenfeng – sequence: 7 fullname: LIU Huazhang
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DocumentTitleAlternate	Effect of Cr-doping on the acidity and pore structure of mesoporous magnesium fluoride
DocumentTitle_FL	Effect of Cr-doping on the acidity and pore structure of mesoporous magnesium fluoride
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Keywords	chromium fluoride 歧化反应 mesoporous magnesium fluoride 中孔氟化镁氟化铬 monochlorodifluoromethane disproportionation 共沉淀法二氟一氯甲烷 co-precipitation
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Notes	The effect of Cr-doping on the acidity and pore structure of mesoporous magnesium fluoride prepared by co-precipitation was investigated. The prepared MgF2, CrF3, and Cr(x)-MgF2with different Cr loadings were characterized by N2 adsorption-desorption, X-ray powder diffraction, transmission electron microscopy, pyridine adsorptionFourier transform infrared spectroscopy, and NH3 tempera-ture-programmed desorption. The catalytic activity of MgF2 and Cr(x)-MgF2 was tested in the disproportionation of CHClF2.The doped Cr in the MgF2 results in the improvements of the specific surface area and surface Lewis acidity. Meanwhile, the MgF2 catalystsamples doped with Cr show excellent catalytic performance in CHClF2 disproportionation. mesoporous magnesium fluoride;chromium fluoride;monochlorodifluoromethane;disproportionation;co-precipitation 21-1195/O6 NIU Huaichenga, LI Lichuna, LI Yinga,*, GUO Lib,#, TANG Haodonga, HAN Wenfenga, LIU Huazhanga aInstitute of Industrial Catalysis,Zhejiang University of Technology, Hangzho
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PublicationTitle	催化学报
PublicationTitleAlternate	Chinese Journal of Catalysis
PublicationTitle_FL	Chinese Journal of Catalysis
PublicationYear	2013
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Snippet	采用共沉淀法制备了MgF2,CrF3与不同Cr含量的Cr(x)-MgF2样品,采用X射线粉末衍射、N2物理吸附-脱附、透射电镜、吡啶吸附的傅里叶变换红外光谱和NH3程序升温脱附等手段对样品的...
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SubjectTerms	中孔氟化镁二氟一氯甲烷共沉淀法歧化反应氟化铬
Title	Cr掺杂对中孔MgF2酸性及孔结构的影响
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