Fabrication of Stable Cu-Ce Catalyst with Active Interfacial Sites for NOx Elimination by Flame Spray Pyrolysis

Catalysts

Jiafeng Yu¹  Xin Tong¹  Ling Zhang¹  Jian Sun¹ 

[1] Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;

关键词: Cu-based catalysts;    flame spray pyrolysis;    NO_x elimination;    active interfacial sites;    high stability;   

DOI  :  10.3390/catal12040432

来源: DOAJ

【 摘 要 】

The complete conversion of NO_x to harmless N₂ without N₂O formation is crucial for the control of air pollution, especially at low temperatures. Cu-based catalysts are promising materials due to their low cost and high activity in NO dissociation, even comparable to noble metals; however, they suffer from low stability. Here, we established a Cu-Ce catalyst in one step with strong metal–support interaction by the flame spray pyrolysis (FSP) method. Almost 100% NO conversion was achieved at 100 °C, and they completely transferred into N₂ at a low temperature (200 °C) for the FSP-CuCe catalyst, exhibiting excellent performance in NO reduction by CO reaction. Moreover, the catalytic performance can stay stable, while 23% NO conversion was lost in the same condition for the one made by the co-precipitation (CP) method. This can be attributed to the synergistic effect of abundant active interfacial sites and more flexible surface oxygen created during the FSP process. The flame technology developed here provides an efficient way to fabricate strong metal–support interactions, exhibiting notable potential in the design of stable Cu-based catalysts.

【 授权许可】

Unknown