| 铝掺杂对铜铈复合氧化物催化一氧化碳氧化性能的影响 |
| Effect of Aluminum Addition on Performance of CuO-CeO2 Catalyst for Oxidation of CO |
|
| 摘要: 以金属硝酸盐为原料、碳酸钠为沉淀剂，采用共沉淀法制备了一系列Cu0.1Ce0.9-xAlxOy复合氧化物催化剂，并用低温氮气吸附/脱附、X-射线衍射(XRD)和氢-程序升温还原(H2-TPR)等对样品进行了表征，利用微反-色谱评价装置考察了催化剂对CO低温氧化反应的活性，研究了Al含量(x=0~0.3)和催化剂焙烧温度(350、500和650 ℃)对Cu0.1Ce0.9-xAlxOy催化活性的影响。结果表明，随着催化剂中Al含量(x)的增加，Cu0.1Ce0.9-xAlxOy的催化活性先提高，至x=0.1时达到最大，之后又逐渐降低；当催化剂的焙烧温度为500 ℃时，Cu0.1Ce0.8Al0.1Oy的催化活性最大。Cu0.1Ce0.9-xAlxOy的催化活性与其CuO的还原性之间有较好的对应关系。 |
| 关键词: 铝 CuO-CeO2催化剂 CO低温氧化 共沉淀 |
| 基金项目: |
| Abstract: A series of Cu0.1Ce0.9-xAlxOy catalysts were prepared by co-precipitation using metal-nitrates and sodium carbonate as raw materials and precipitating agent, respectively. The obtained catalysts were characterized by low temperature N2 adsorption/desorption, XRD and H2-temperature-programmed reduction (H2-TPR) techniques. Their catalytic activities for the low temperature oxidation of CO were evaluated by using a microreactor-GC system. The effects of Al content and catalyst calcination temperature on the activity of the Cu0.1Ce0.9-xAlxOy catalysts were investigated. The results show that the catalytic activity of the prepared Cu0.1Ce0.9-xAlxOy increases firstly with Al content, reaches a maximum at x=0.1, and then decreases. On the other hand, the CO conversion reaches a maximum over the Cu0.1Ce0.8Al0.1Oy catalyst calcined at 500 ℃. The activity of the Cu0.1Ce0.9-xAlxOy catalyst for CO oxidation is well correlated with the reducibility of CuO. |
| Keywords: aluminum CuO-CeO2 catalyst low temperature CO oxidation co-precipitation |
| |
| 摘要点击次数: 1582 |
| 全文下载次数: 1795 |
| 王 倩,毛东森,方珍妮,俞 俊,杨志强.铝掺杂对铜铈复合氧化物催化一氧化碳氧化性能的影响[J].无机化学学报,2010,26(9):1639-1645. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
