SrTi_(0.9)M_(0.1)O_(3-δ)钙钛矿型氧化物催化剂甲烷氧化偶联反应性能的研究

作     者：缪建文 范以宁 金永漱 陈懿 

作者机构：南京大学化学系 

出 版 物：《无机化学学报》 (Chinese Journal of Inorganic Chemistry)

年 卷 期：2003年第19卷第11期

页      面：1257-1260页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：国家重点基础研究发展规划项目(No.G1999022400) 南京大学分析测试基金资助课题 

主　　题：SrTi0.9M0.1O3-δ 钙钛矿型氧化物 催化剂 甲烷 氧化偶联反应 性能 氧空位 吸附氧 

摘      要：The structure and catalytic properties of SrTi0.9M0.1O3- δ (M=Mg,Al, Zr) perovskite type catalysts for oxidative coupling of methane (OCM) have been studied by using X ray diffraction (XRD),X ray photoelectron spectroscopy (XPS) and temperature programmed desorption of oxygen(O2 TPD) methods. It has been shown that doping the cations of lower valence (e.g. Mg2+ , Al3+ ) to the B site of SrTi0.9M0.1O3- δ perovskite type catalysts results in the higher content of adsorbed oxygen species on the surface of catalysts and thus higher C2 selectivity for OCM reaction. It is suggested that the oxygen vacancies of SrTi0.9M0.1O3- δ (M=Mg, Al, Zr) perovskite type catalysts are the sites responsible for oxygen activation, and the adsorbed oxygen species on the surface of SrTi0.9M0.1O3- δ catalysts are the main active species for OCM reaction.