Example：10.1021/acsami.1c06204 or Chem. Rev., 2007, 107, 2411-2502
Plasma-induced construction of defect-enriched perovskite oxides for catalytic methane combustion Environmental Science: Nano (IF8.131), Pub Date : 2021-06-24, DOI: 10.1039/d1en00339a Qingqing Tian, Zhicheng Wang, Minghao Yuan, Shuai Zhao, Huawei Chen, Lei Li, Mifen Cui, Xu Qiao, Zhaoyang Fei
Perovskite oxides have been considered as appropriate alternatives to precious metal catalysts in CH4 combustion due to their excellent activity and sintering-resistance capacity. Herein, an innovative plasma-induced strategy was employed to the one-step preparation of porous LaMnO3 (LMO-P) and cerium-substituted LaMnO3 (LCMO-P) perovskite oxides with enhanced lattice distortion. The increased specific surface area provided numerous active sites for surface diffusion, and formational lattice distortion introduced more active oxygen species. Exceptionally, the defect-enriched porous LMO-P and LCMO-P catalysts displayed supreme low temperature CH4 oxidation activities, giving T90 of 475 °C and 440 °C at a space velocity of 30 000 mL g−1 h−1, respectively. The excellent catalytic activities of plasma-induced perovskite catalysts might be associated with high reactivity of oxygen adspecies as well as preferable reducibility. This study will provide a novel and universal strategy for the synthesis of composite oxide catalysts with rich surface defects.