复合改性ZSM-5纳米片催化N_2O分解反应研究  

Catalytic Decomposition of N_2O over Modified Nanosheet-ZSM-5

作　　者：邹薇[1,2] 谢鹏飞[1] 周亚新[2] 孔德金[2] 乐英红[1] 

机构地区：[1]复旦大学化学系,上海市分子催化和功能材料重点实验室,上海200433 [2]中国石油化工股份有限公司上海石油化工研究院,上海201208

出　　处：《复旦学报（自然科学版）》2015年第3期277-281,295,共6页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金资助项目(21273043);上海市科学技术委员会资助项目(08DZ2270500)

摘　　要：以ZSM-5纳米片(Nanosheet-ZSM-5)为前驱体,醋酸铜、硝酸银、硝酸铈和硝酸镧为改性剂,采用一步法离子交换,制备了不同金属复合改性ZSM-5纳米片催化剂,测试了其N2O催化分解性能,结合催化剂的理化性质、H2-TPR和O2-TPD等表征,研究了复合改性对催化剂N2O分解性能的影响及其原因.结果表明,Ag、Ce或La的掺入,可促进Cu-ZSM-5纳米片催化剂上活性物种的还原,加快吸附氧的脱附,从而提高了N2O的催化分解活性.经Ag、Ce复合改性还可有效提高Cu-ZSM-5纳米片催化剂的低温活性.Cu-Nanosheet-ZSM-5catalyst was prepared and modified by ion-exchanged with silver,lanthanum or cerium.The catalytic performance of these modified catalysts in N2 O decomposition was investigated and compared with that of Cu-Nanosheet-ZSM-5.The addition of silver and cerium（or lanthanum）improves the activity of CuNanosheet-ZSM-5in N2 O decomposition.Relevant characterization was conducted using ICP,N2 adsorptiondesorption,H2-TPR and O2-TPD,which shows that the enhanced catalytic performance is probably due to better reducibility of active Cu＋species and the weakened interaction between oxygen and Cu＋sites after modification.

关 键 词：ZSM-5纳米片 N2O分解 Cu AG LA CE 

分 类 号：O643.3[理学—物理化学]