期刊论文详细信息
Journal of Chemical Sciences
Catalytic decomposition of N₂O over CeO₂ supported Co₃O₄ catalysts
CH SUBRAHMANYAM1  T AKANKSHA1  K KRUSHNAMURTY1  S K MAHAMMADUNNISA1 
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关键词: Low temperature N₂;    O decomposition;    cobalt oxide;    ceria;    solution combustion synthesis;    citric acid.;   
DOI  :  
来源: Indian Academy of Sciences
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【 摘 要 】

This work was aimed to design efficient catalysts for N₂O decomposition at low temperatures. Cobalt oxide (Co₃O₄) was prepared by hydrothermal, precipitation and combustion methods and tested for N₂O decomposition. It was found that the catalysts prepared by solution combustion synthesis were most active for this reaction. Subsequently, a series of ceria (CeO₂) supported Co₃O₄ catalysts (xCeCo) were prepared by solution combustion method and used them for N₂O decomposition. All the catalysts were characterized by analytical methods like XRD, TEM, BET, XPS, UV-Vis, Raman and H2-TPR. It was found that 10 and 20 wt..% loading of CeO₂ on Co₃O₄ promoted the activity of Co₃O₄ towards N₂O decomposition, whereas, higher loading of CeO₂ reduced the activity. Typical results indicated that addition of CeO₂ increases the surface area of Co₃O₄ , and improves the reduction of Co³⁺ to Co²⁺ by facilitating the desorption of adsorbed oxygen species, which is the rate-determining step for the N₂O decomposition over Co₃O₄ spinel catalysts. Optimal CeO₂ loading can increase both dispersion and surface area of Co₃O₄ catalysts and weaken the Co–O bond strength to promote N₂O decomposition.

【 授权许可】

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