制备高比表面负载型催化剂的一种新方法

doi:10.3866/PKU.WHXB19930103

CORC > 北京大学 > 化学与分子工程学院

	制备高比表面负载型催化剂的一种新方法; A NEW WAY TO PREPARE SOME SUPPORTED CATALYSIS WITH HIGHLY SPECIFIC SURFACES
	赵璧英 ; 徐献平 ; 马华容 ; 高金明 ; 王荣秋 ; 孙东虹 ; 唐有祺
刊名	物理化学学报
	1993
关键词	增大比表面负载型催化剂 ZrO_2载体 TiO_2载体单层分散 Increase in specific surface area Supported catalyst Monolayer dispersion ZrO2 TiO2
DOI	10.3866/PKU.WHXB19930103
英文摘要	制备具有大比表面、适宜孔结构的催化剂一直是催化剂研究的重要课题之一.近年,氧化锆、氧化钛载体以其独特性能引起多方面的关注.然而,这两种载体不但本身比表面较小,而且在高温灼烧时比表面急剧下降,所以很难制成高比表面催化剂,极大地限制了它们的应用.本文提出一种制备高比表面负载型催化剂的新方法,它特别适用于TiO_2、ZrO_2.它是在以下两个想法的基础上提出的.(1)我们在工作中曾发现,将仲钼酸铵加到Ti(OH)_4中,经500℃、4小时焙烧,所得的MoO_3/TiO_2(MoO_3质量分数为13.0%)比表面可达133m~2·g~(-1).而用仲钼酸铵浸渍已晶化; In this paper, a new way to increase the specific surface areas of supported catalysts has been suggested. The results for MoO3/ZrO2, WO3/ZrO2, CuO/ZrO2, SO42-/ZrO3, NiO/ZrO2, Fe2O3/ZrO2, Fe-2(SO4)(3)/ZrO2, MoO3/TiO2, SO42-/TiO2, NiSO4/TiO2, V2O5/TiO2 etc. system show that the specific surfaces areas of the samples, prepared by impregnating some hydoxides then calcinating at high temperature, are much larger than those of the samples prepared with a traditional method-impregnating their oxides calcinated at the same temperature. Using this way, the specific surface areas of some supported catalysts can increase by serveral times. The surface areas of some supports such as zirconia and titania are not large enough, and they are easy to sinter at high temperature. In these cases, the advantage of this preparation method is fully displayed, and the specific surface areas of the resulting zirconia - or titania - supported catalysts can compare favourably with those of the catalysts prepared from some classical supports (such as gamma-Al2O3, SiO2). In addition, it has been proved by means of XPS, XRD, LRS and DTA that as an active component disperse on a support as a monolayer and its content comes up to its monolayer dispersion capacity, the specific surface area of the obtained catalyst would be the largest. We suggest a mechanism that an active component covered on a support can not only segregate its particles, but also hinder the surface diffusion of support, and as a result, its crystalline growth, an accompanying phase transformation and inter-crystalline sintering are all retarded.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000207577300003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 11; 01; 8-12; 9
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/84214]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	赵璧英,徐献平,马华容,等. 制备高比表面负载型催化剂的一种新方法, A NEW WAY TO PREPARE SOME SUPPORTED CATALYSIS WITH HIGHLY SPECIFIC SURFACES[J]. 物理化学学报,1993.
APA	赵璧英.,徐献平.,马华容.,高金明.,王荣秋.,...&唐有祺.(1993).制备高比表面负载型催化剂的一种新方法.物理化学学报.
MLA	赵璧英,et al."制备高比表面负载型催化剂的一种新方法".物理化学学报 (1993).