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	CO为还原剂同时还原SO2和NO的SnO2-TiO2固溶体催化剂Ⅲ.催化剂的活性位和反应机理; SnO2-TiO2 Solid Solution Catalyst for Simultaneous Reduction of SO2 and NO by CO Ⅲ.Catalyst Active Sites and Reaction Mechanism
	刘赵穹 ; 马骏 ; 杨锡尧
	2004
关键词	二氧化锡 二氧化钛 固溶体 一氧化碳 还原 二氧化硫 一氧化氮 反应机理 活性位 tin dioxide titania solid solution carbon monoxide reduction sulfur dioxide nitric oxide reaction mechanism active site
英文摘要	采用显微红外光谱、漫反射红外光谱、瞬变应答反应以及催化剂活性测试等实验手段,对SnO2-TiO2催化剂上SO2+CO,NO+CO和SO2+NO+CO (SRSN)反应的机理及活性位进行了综合研究. 结果表明, SO2+CO和NO+CO反应按典型的Redox机理进行,催化剂的表面晶格氧 [O]和氧阴离子空穴 [□]( [O]- [□])是Redox反应的活性位. 对于SO2+CO反应,其 [O]- [□]位于SnO2-TiO2催化剂中邻近Sn离子和邻近Ti离子的位置,邻近Ti离子的 [O]- [□]的活性比邻近Sn离子的 [O]- [□]的活性高. NO+CO反应主要在邻近Sn离子的 [O]- [□]中心上进行. 对于SRSN反应,其中的SO2+CO反应的机理及催化剂的活性位与单纯的SO2+CO反应相同,而其中的NO+CO反应按两种机理进行: 一种和单纯的NO+CO反应相同,即按一般的Redox机理进行,其活性位为邻近Sn离子的 [O]- [□]中心; 另一种按SO2促Redox反应机理进行,其活性位为表面活性硫物种 [SO]*.; The reaction mechanism of SO2 + CO, NO + CO and SO2 + NO + CO (simultaneous reduction of SO2 and NO, SRSN) reactions on the SnO2-TiO2 catalyst and catalyst active sites were investigated by microscopic infrared spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, transient response experiments and catalytic reaction test. SO2 + CO and NO+ CO reactions are typical redox reactions and both are carried out on the active sites composed of surface crystal oxygen [O] and oxygen anion vacancy In the case of the SO2 + CO reaction, the active sites [O]-[rectangle] are near either Ti ions or Sri ions, and the sites near Ti ions are more active than those near Sri ions. For the NO+ CO reaction, however, the active sites are mainly near Sri ions. As for the SRSN reaction, SO2 + CO has the same mechanism as the pure SO2 + CO reaction, while NO + CO proceeds along two paths: one is the typical redox reaction with [O] - [rectangle] as the active sites and the other is the SO2-assisted NO + CO reaction carried out on the active sites which are consisted of surface active sulfur species [SO]*.; 国家重点基础研究发展计划(973计划); 国家自然科学基金; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000223853700008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 7; 8; 624-632; 25
语种	中文
出处	万方 ; SCI ; http://d.g.wanfangdata.com.cn/Periodical_cuihuaxb200408008.aspx
出版者	催化学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/80609]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	刘赵穹,马骏,杨锡尧. CO为还原剂同时还原SO2和NO的SnO2-TiO2固溶体催化剂Ⅲ.催化剂的活性位和反应机理, SnO2-TiO2 Solid Solution Catalyst for Simultaneous Reduction of SO2 and NO by CO Ⅲ.Catalyst Active Sites and Reaction Mechanism. 2004-01-01.

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