Ambient temperature NO oxidation over Cr-based amorphous mixed oxide catalysts: effects from the second oxide components

作者：Wang, Aiyong; Lin, Bo; Zhang, Hanlei; Engelhard, Mark H.; Guo, Yanglong^*; Lu, Guanzhong; Peden, Charles H. F.; Gao, Feng^*

来源：Catalysis Science & Technology, 2017, 7(11): 2362-2370.

DOI：10.1039/c7cy00490g

• HYDROTHERMAL STABILITY
• ROOM-TEMPERATURE
• SCR CATALYSTS
• CO OXIDATION
• REDUCTION
• ADSORPTION
• STORAGE
• NITRATE
• CO3O4
• CU/SAPO-34

Three series of Cr-based mixed oxides (Cr-Co, Cr-Fe, and Cr-Ni oxides) with high specific surface areas and amorphous textures were synthesized using a novel sol-gel method. These mixed oxides, in comparison to their pure metal oxide (CrOx, Co3O4, FeOx and NiO) counterparts, display enhanced performance for catalytic oxidation of low-concentration NO at room temperature. The best performing catalysts achieve 100% NO conversion for similar to 30 h of operation at a high space velocity of 45000 ml g(-1) h(-1). The amorphous structure was found to be critical for these catalysts to maintain high activity and durability. Control of the Cr/M (M = Co, Fe and Ni) molar ratio, nitrate precursor decomposition temperature and catalyst calcination temperature was key to the synthesis of these highly active catalysts.

• 出版日期2017-6-7
• 单位华东理工大学