3 years ago

Catalytic Reduction of NO by CO over Promoted Cu3Ce0.2Al0.8 Composite Oxides Derived from Hydrotalcite-Like Compounds

Catalytic Reduction of NO by CO over Promoted Cu3Ce0.2Al0.8 Composite Oxides Derived
from Hydrotalcite-Like Compounds
Zhangfa Tong, Xueyan Hou, Fan Wang, Bin Li, Haoxuan Yuan, Lixia Teng, Qun Hu, Junning Qian, Ruonan Li, Lihui Dong
Catalytic reduction of NO by CO has been studied over a battery of Cu3CexAl(1–x) composite oxide catalysts prepared by coprecipitation method. The solids were further characterized by X-ray diffraction, laser Raman spectra, N2-physisorption (Brunauer–Emmet–Teller (BET)), H2-temperature-programmed reduction, inductively coupled plasma atomic emission spectroscopy, X-ray photoelectron spectroscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy techniques. The assessment on the catalytic properties were conducted with the NO + CO model reaction. The influences of Cu and different ratios of Ce and Al on the catalytic performance have been investigated. When the ratio of Ce and Al was 1:4, this sample possessed the best catalytic properties, which was exactly derived from hydrotalcite-like compounds. The introduction of a few cerium species (Cu/Ce = 15:1) in the structure improved the activity/selectivity toward selective catalytic reduction of NO by lowering the temperature of carbon monoxide oxidation.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b09041

DOI: 10.1021/acs.jpcc.7b09041

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