钒系催化剂表面结构及活性微区模型的研究  

STUDY ON SURFACE STRUCTURE AND ACTIVE MICRO AREA MODEL OF VANADIUM CATALYSTS

作　　者：段世铎[1] 冯霞[1] 韩顺路 

机构地区：[1]天津大学化学系

出　　处：《宁夏大学学报（自然科学版）》1997年第3期248-251,270,共5页Journal of Ningxia University(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：运用ＸＰＳ，ＩＲ和ＬＲＳ等手段，对萘氧化制苯酐钒系催化剂的表面组成和结构的联合分析结果表明：催化剂表面各元素以ＶＫＳＯ＝１２２１０的比例存在；催化剂以Ｖ２Ｏ５为基本骨架，形成了ＶＯ（ＳＯ４）２－及Ｓ２Ｏ７２－的配位形式。The surface composition and structure of vanadium catalysts used in the naphthalene selective oxidation to phthalic anhydride are studied by means of XPS,IR and LRS.It is shown that the proportion of elements existed in the surface is V∶K∶S∶ O=1∶2∶2∶10 by analyzing the XPS spectrums.On the basis of IR and LRS spectrums information it is proven that there are VO(SO 4) 2- and S 2O 7 2- in the catalysts whose basic framework is V 2O 5.Finally, an active micro area model is proposed.The structure of K 2VO 3SO 4SO 3 is derived to be the basic unit of the surface active micro area.

关 键 词：钒系催化剂 表面结构 活性微区 XPS IR LRS 

分 类 号：O643.36[理学—物理化学]