| 钙钛矿SrFe1-xMnxO3催化剂:共沉淀法制备及催化甲烷燃烧的性能 |
| Perovskite-Type SrFe1-xMnxO3 Catalysts: Preparation by Co-precipitation Method andCatalytic Performance for Methane Combustion |
|
| 摘要: 通过共沉淀法制备了SrFe1-xMnxO3钙钛矿催化剂。用XRD、TPR和TG-DSC技术对催化剂进行了物理性能表征,以甲烷催化燃烧为目标反应表征其催化性能,通过BET模型计算了其比表面积,通过阿伦尼乌斯方程计算了反应的表观活化能。结果表明用共沉淀法制备钙钛矿催化剂经700 ℃焙烧4 h后可以形成完整的钙钛矿晶型, 样品都具有高的催化性能,但随着锰离子的掺杂,催化剂活性明显提高,其中SrMnO3催化剂具有较高甲烷催化燃烧活性, 起燃温度T10%为435 ℃,至457 ℃甲烷完全转化。 |
| 关键词: 材料科学 钙钛矿 催化活性 |
| 基金项目: 安徽省教育厅自然科学研究重点项目(No.KJ2012A213), 安徽省教育厅教研项目(No.2012jyxm534), 安徽省应用化学重点学科(No.
200802187C)资助项目。 |
| Abstract: Manganese substituted ferric perovskite-type catalysts were prepared by co-precipitation method. The title catalysts were calcined at 700 ℃ and characterized by XRD, TPR and TG-DSC techniques. The catalytic activity was evaluated using methane combustion as a model reaction. The specific surface area was calculated by BET model. The values of the apparent activation energy were estimated from the Arrhenius plots based on a CH4 first-order rate equation. The samples exhibit significant catalytic activity for methane combustion at 700 ℃. With increasing the substitution of Mn2+, the activities of the catalysts are improved. Upon calcination at 700 ℃ the catalyst SrMnO3 shows an excellent activity for methane combustion (the conversion of 10% and 90% are obtained at 435 ℃ and 457 ℃, respectively). |
| Keywords: materials science perovskite catalytic activity |
| 投稿时间：2012-10-05 修订日期：2013-03-08 |
| 摘要点击次数: 2636 |
| 全文下载次数: 2398 |
| 郑建东,葛秀涛.钙钛矿SrFe1-xMnxO3催化剂:共沉淀法制备及催化甲烷燃烧的性能[J].无机化学学报,2013,29(6):1307-1311. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
