Co/ZrO2催化剂的结构及TPR性能研究

• 作 者: 俞铁铭 周仁贤 唐中民 郑小明
• 机 构: 浙江大学催化研究所
• 出 处: 高等学校化学学报
• 发表日期: 1999年01期
• 关键词: 催化剂 结构

采用ＸＲＤ和ＴＰＲ技术研究了ＣｏＺｒＯ体系催化剂的物相结构及还原性能，并以ＣＯ氧化反应为探针考察了催化剂的氧化活性．结果表明，钴的存在会阻止ｔＺｒＯ２→混合相→ｍＺｒＯ２的转变和ＺｒＯ２颗粒的增长；高温焙烧后，部分钴氧化物与载体ＺｒＯ２形成固溶体．Ｃｏ／ＺｒＯ２催化剂中的钴以Ｃｏ３Ｏ４的形式存在，钴锆之间的相互作用有利于钴的分散．随着Ｃｏ负载量增加，催化剂的ＣＯ氧化活性提高

XRD and TPR techniques were used to study the phase structure and reduction performance of CoZrO catalyst. The oxidation activity of the catalyst was also investigated by CO oxidation reaction. The results show that the presence of cobalt will prevent the transition of tZrO2 → mixed phase → mZrO2 and the growth of ZrO2 particles. After the calcination at high temperature, some cobalt oxides form solid solution with ZrO2. The Co in the Co / ZrO2 catalyst exists in the form of Co3O4, and the interaction between cobalt and zirconium favors the dispersion of cobalt. As Co loading increases, the catalyst’s CO oxidation activity increases