用ESR研究固体催化剂机械粉碎效应的试验方法  

An Experimental Method for Studying the Effect of Mechanical Fracture of Solid State Catalysts by ESR

作　　者：胡强[1] 郭时清[1] 

机构地区：[1]复旦大学分析测试中心

出　　处：《石油化工》1989年第2期117-120,共4页Petrochemical Technology

摘　　要：介绍一种研究固体催化帮机械粉碎效应的试验装置,并用 ESR 技术对 MgO 机械粉碎进行了考察。试验发现在高真空环境下 MgO 经机械粉碎后产生了新的顺磁中心。新的顺磁中心吸附 O_2后,ESR 检测到了 O_3^-负离子的信号,同时还有少量 O_2^-负离子的信号。当 MgO 在 O_2气氛中粉碎时,ESR 检测的主要是 O_2^-负离子的信号。A brief introdution was presented for an apparatus used for studying the ef-fect of mechanical fracture of solid state catalysts.The mechanical fracture of MgOwas investigated using ESR technique.After MgO was fractured in high vacuum,itwas found that new paramagnetic centers were formed,and when O_2 was intro-duced thesignals of O_3^- anion and a small amount of O_2^- anion were detected byESR.In contrast,if MgO was fractured in the atmosphere of O_2,ESR detected O_2^-anion as a major species.

关 键 词：ESR 固体催化剂 机械粉碎 

分 类 号：O643.361[理学—物理化学]