Novel Co-Mg-Al-Ti-O catalyst derived from hydrotalcite-like compound for NO storage/decomposition.
Catalysts of Co1.5Mg1.5/Al0.9Ti0.1O and Co1.5Mg1.5/A1O were successfully prepared by calcinations of corresponding hydrotalcite-like compounds at 800 degrees C for 4 hr. The derived oxides were of spinel phase and a small quantity of Ti substitution did not change the crystal purity. Their catalytic performance for the NO storage/decomposition was investigated. Ti incorporation enhanced the NO decomposition activity while has an opposite effect on the storage capacity of catalyst. In situ FT-IR spectra of the catalysts showed that the final adsorption species on the catalysts was coordinated nitrates/nitrites. In addition, NO storage/decomposition mechanism has been discussed on the basis of these observations.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. jiecheng@rcees.ac.cn
Jie
J
Cheng
Xiaoping
X
Wang
Chunyan
C
Ma
Zhengping
Z
Hao
D000535:Aluminum / Q000737:chemistry; D000536:Aluminum Hydroxide / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry; D008274:Magnesium / Q000737:chemistry; D008276:Magnesium Hydroxide / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D009569:Nitric Oxide / Q000737:chemistry*; D013458:Sulfur Dioxide / Q000737:chemistry; D014025:Titanium / Q000737:chemistry
D008670:Metals; D013458:Sulfur Dioxide; C009495:titanium dioxide; C010467:hydrotalcite; D009569:Nitric Oxide; D003035:Cobalt; D000536:Aluminum Hydroxide; D000535:Aluminum; D014025:Titanium; D008274:Magnesium; D008276:Magnesium Hydroxide