WANG Ben¹,PAN Qi²,LIU Jianxun¹,LUAN Xinru¹,ZHAI Yujia¹,AI Lijie¹,LIU Wei¹,WANG Zhongpeng¹

(1.School of Water Conservancy and Environment,University of Jinan,Jinan,250022,China; 2.Shandong Provincial Eco-environment Monitoring Center,Jinan,250101,China)

Abstract：La-based perovskite (LaMO₃) catalysts with different B-sites transition mental elements(Mn、Fe、Co、Ni) were prepared by solution combustion method,and the effect of partial substitution of La by a small amount of Sr on the catalyst performance was investigated.The catalysts were characterized physicochemically by XRD,SEM,BET,H₂-TPR and XPS,and the performance of the catalysts for catalytic carbon soot combustion was evaluated by temperature-programmed oxidation (TPO).The results show that the La-based catalysts prepared by solution combustion method have a typical perovskite structure,and the crystal morphology of the catalysts is not changed after Sr doping.The charge imbalance caused by Sr doping LM is compensated by the increase of Mn⁴⁺.Sr doping LC significantly increases the amount of adsorbed oxygen.The redox performance of LSM and LSN are lower than that of Sr-free samples and the amount of oxygen species adsorbed on LSF surface increases,which improve the low temperature oxidation reducibility of the catalyst.The LSC catalyst has the best catalytic performance among these catalysts,with the t₅₀ of catalytic soot combustion=369 ℃ and S_CO2=100%.

Keywords：solution combustion method;La-based perovskite;soot;catalytic combustion

Get Citation: WANG B,PAN Q,LIU J X,et al.Lanthanum-based perovskite catalysts prepared by solution combustion method and its catalytic performance for soot combustion[J].China Powder Science and Technology,2023,29(3)：92-100.

Received:： 2023-01-10,Revised：2023-01-28,Online：2023-04-21 16:27。

Funding Project：国家自然科学基金项目,编号 ：21777055;山东省自然科学基金项目,编号：ZR2021MB063,ZR2020MB120,ZR2022MB011。

First Author：王犇(1997—),女,硕士研究生,研究方向为环境功能材料开发与应用。E-mail：benwang97@163.com。

Corresponding Author：王仲鹏(1978—),男,教授,博士,博士生导师,研究方向为大气污染控制与催化技术。E-mail：chm_wangzp@ujn.edu.cn。