Activity of coprecipitated CuO/ZnO catalysts in the decomposition of dimethylhexane-1,6-dicarbamate

In the decomposition of dimethylhexane-1,6-dicarbamate over the coprecipitation-derived CuO/ZnO catalysts with various Cu/Zn ratios, Cu-rich oxides exhibited the enhanced activities but Zn-rich ones the lower activities, compared to physical mixtures of the single component. It was revealed that the...

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Bibliographic Details
Published in:Catalysis communications 2015-10, Vol.70, p.34-39
Main Authors: Jeong, Cheonwoo, Hyun, Min Jeong, Suh, Young-Woong
Format: Article
Language:English
Subjects:
Carbamate decomposition
Coprecipitation
Cu/Zn hydroxycarbonate precursor
CuO/ZnO catalyst
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Summary:In the decomposition of dimethylhexane-1,6-dicarbamate over the coprecipitation-derived CuO/ZnO catalysts with various Cu/Zn ratios, Cu-rich oxides exhibited the enhanced activities but Zn-rich ones the lower activities, compared to physical mixtures of the single component. It was revealed that the activity trend resulted from an intimate intergrowth and interfacial contact of individual CuO and ZnO nanoparticles. Furthermore, a substitution of the second metal in the single precursor phase, e.g., Cu2+ substitution by Zn2+ in the malachite phase and Zn2+ substitution by Cu2+ in the hydrozincite phase, was found to affect the activity and properties of the calcined CuO/ZnO catalysts. [Display omitted] •Cu-rich CuO/ZnO catalysts showed the enhanced activity in HDC decomposition.•The activity enhancement was due to intimate intergrowth of oxide nanoparticles.•The lower activity was obtained in Zn-rich CuO/ZnO catalysts.•The activity decrease resulted from interfacial contact of nano-sized CuO and ZnO.•The Cu/Zn precursor property affects the catalytic activity of CuO/ZnO.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2015.07.011