| 王璞,王旭君,徐壮,周毛毛,郑建东.化学通报,2018,81(7):587-591. |
| La2-xSrxFeNiO6催化剂的制备及其催化甲烷燃烧性能研究 |
| Synthesis of La2-xSrxFeNiO6 catalysts and investigation on their catalytic activity for methane combustion |
| 投稿时间：2018-03-29 修订日期：2018-05-01 |
| DOI： |
| 中文关键词: 双钙钛矿 锶掺杂 |
| 英文关键词:Double perovskite, cerium doping, catalytic combustion of methane |
| 基金项目:安徽省教育厅自然科学研究重点项目(KJ2017A412),安徽省教育厅质量工程项目(2014zjjh042、2015sjjd024、2015jxtd040),大学生创新项目(201710377021)校级科研启动基金(2016qd02) |
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| 中文摘要: |
| 摘 要 以柠檬酸为络合剂，通过溶胶-凝胶法制备La2-xSrxFeNiO6（x=0、0.5、1、1.5、2）系列催化剂，考察A位离子Sr掺杂对La2FeNiO6催化甲烷燃烧的影响。通过X射线衍射（XRD）、程序升温还原（H2-TPR）、比表面积测定（BET）和热重分析仪（TG-DSC）等技术进行物理性能表征。结果表明：Sr的掺杂可以改变双钙钛矿晶体结构，提高了晶格氧的数量，改善催化活性。当X=1时，LaSrFeNiO6催化甲烷燃烧活性最好，其比表面积为7.9 m2.g-1，T10%（起燃温度）为370 ℃，T90%（完全转化温度）为535 ℃；同时，反应活化能最小，为78.8 KJ.mol-1。 |
| 英文摘要: |
| Abstract La2-xSrxFeNiO6 (x=0, 0.5, 1, 1.5, 2) series catalysts were prepared by sol-gel method using citric acid as a complexing agent. The influence of Sr doping on catalyst La2FeNiO6 was investigated. The title catalysts were characterized by XRD, BET, H2-TPR and TG-DSC techniques. The catalytic activity was evaluated for methane combustion. The results show that the doping of Sr can change the crystal structure of double perovskites and increase the amount of lattice oxygen. The catalyst LaSrFeNiO6 retains a specific surface area of 7.9 m2.g-1 and
shows an excellent activity for methane combustion (the conversion of 10% and 90% is obtained at 370℃ and 535℃, respectively). At this reaction the activation energy was 78.8 KJ.mol-1. It was smaller than other reaction. |
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