| CeO2对催化剂银物种及CO氧化性能的影响 |
| |
| 引用本文： | 曲振平,张晓东,陈丹,李新勇,闻梦,王奕,马丁,吴晶晶. CeO2对催化剂银物种及CO氧化性能的影响[J]. 高等学校化学学报, 2011, 32(7): 1605-1609 |
| |
| 作者姓名： | 曲振平 张晓东 陈丹 李新勇 闻梦 王奕 马丁 吴晶晶 |
| |
| 作者单位： | 1. 大连理工大学环境学院工业生态与环境工程教育部重点实验室, 大连 116024;2. 中国科学院大连化学物理研究所, 催化基础国家重点实验室, 大连 116023 |
| |
| 基金项目： | 国家自然科学基金(批准号:20807010); 新世纪优秀人才支持计划(批准号:NCET-09-0256)资助 |
| |
| 摘 要： | 采用共浸渍、不同分步浸渍的方法制备了8 wt% Ag/CeO2-SiO2催化剂，运用XRD、UV-Vis、BET等多种手段对催化剂的结构进行表征，考察了其对CO氧化的活性，并初步探讨了助剂CeO2对催化剂结构及活性物种的影响。实验结果表明，添加1 wt% CeO2的8 wt% Ag/SiO2催化剂表现出较好的低温CO催化活性，随后氢气预处理明显提高了催化剂的反应活性。XRD和UV-Vis谱图表明少量的CeO2（1 wt%）有利于金属银物种的形成，并且能够提高Ag粒子的稳定性，高温处理不易聚集。高CeO2负载量下的催化剂中银物种主要以银簇（ ）形式存在。
|
| 关 键 词： | 银 CO催化氧化 CeO2 活性物种 |
| 收稿时间： | 2010-07-22 |
Effect of CeO_2 on the Silver Species and Its Catalytic Activity for CO Oxidation |
| |
| QU Zhen-Ping,ZHANG Xiao-Dong,CHEN Dan,LI Xin-Yong,WEN Meng,WANG Yi,MA Ding,WU Jing-Jing. Effect of CeO_2 on the Silver Species and Its Catalytic Activity for CO Oxidation[J]. Chemical Research In Chinese Universities, 2011, 32(7): 1605-1609 |
| |
| Authors: | QU Zhen-Ping ZHANG Xiao-Dong CHEN Dan LI Xin-Yong WEN Meng WANG Yi MA Ding WU Jing-Jing |
| |
| Affiliation: | 1. Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China;2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China |
| |
| Abstract: | 8%(mass fraction) Ag/CeO2-SiO2 catalysts were prepared by an incipient wetness co-impregnation and two-step impregnation methods.XRD,UV-Vis and BET were used for the characterization of the catalysts and the catalytic activity for CO oxidation was studied.The effects of CeO2 on the structure of catalysts and the silver active species were discussed.The results indicate that 8%Ag/1%CeO2-SiO2 show better catalytic activity for CO oxidation,and the activity is further increased after hydrogen treatment.XRD and... |
| |
| Keywords: | Silver Carbon monoxide(CO) catalytic oxidation Cerium dioxide(CeO2) Active species |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《高等学校化学学报》浏览原始摘要信息 |
|
点击此处可从《高等学校化学学报》下载全文 |
|
