| 复合结晶银催化剂的制备及催化性能 |
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| 引用本文： | 刘琼,沈江,沈伟,徐华龙. 复合结晶银催化剂的制备及催化性能[J]. 复旦学报(自然科学版), 2006, 45(3): 344-347 |
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| 作者姓名： | 刘琼 沈江 沈伟 徐华龙 |
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| 作者单位： | 华谊集团上硫化工有限公司,上海,200431;复旦大学,化学系,上海,200433 |
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| 基金项目： | 国家自然科学基金资助项目(20421303) |
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| 摘 要： | 应用超声波电解法制备了La2O3/Ag复合银催化剂.利用SEM,XRD等手段对负载不同氧化镧含量的催化剂研究结果表明:电解过程中嵌入少量氧化镧,结晶银的晶体结构得到保持,催化剂的抗烧结性能得到显著提高.以丙二醇选择性催化氧化为反应体系,比较了1%La2O3/Ag复合结晶银和工业结晶银催化剂的催化活性和稳定性,实验结果表明:复合结晶银催化剂的低温氧化活性受到部分抑制,但是催化剂稳定性和反应选择性得到显著提高.
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| 关 键 词： | 复合结晶银催化剂 选择性催化氧化 丙二醇 |
| 文章编号： | 0427-7104（2006）03-0344-04 |
| 收稿时间： | 2005-09-30 |
| 修稿时间： | 2005-09-30 |
The Preparation and Catalytic Behavior of Complex Silver Catalyst |
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| LIU Qiong,SHEN Jiang,SHEN Wei,XU Hua-long. The Preparation and Catalytic Behavior of Complex Silver Catalyst[J]. Journal of Fudan University(Natural Science), 2006, 45(3): 344-347 |
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| Authors: | LIU Qiong SHEN Jiang SHEN Wei XU Hua-long |
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| Affiliation: | 1. Shangliu Co. Ltd., Huayi Group, Shanghai 200431, China ; 2. Chemistry Department, Fudan University, Shanghai 200433, China |
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| Abstract: | La_2O_3/Ag complex silver catalyst was prepared by ultrasonic electrolytic method.The catalysts with different loading weight of La_2O_3 were investigated by SEM,XRD and ICP.The crystal structure of silver was not destroyed after mixing with small amount of La_2O_3/Ag in electrolytic process,but thermo-stability was improved obviously.The activity and stability of complex silver catalysts were compared in selective oxidation of ethylene glycol reaction system between 1%La_2O_3/Ag and pure electrolytic silver catalyst,the results revealed that activity of complex silver catalyst was inhibited slightly,however the stability and selectivity was enhanced obviously at high reaction temperature zone. |
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| Keywords: | complex silver catalyst selective catalytic oxidation propenlene glycol |
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