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首页> 外文期刊>Journal de Chimie Physique et de Physico-Chimie Biologique >Catalyseurs cuivre-zinc. X. Comparaison de quelques methodes de preparation: coprecipitation, precipitations successives ou precurseur bimetallique
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Catalyseurs cuivre-zinc. X. Comparaison de quelques methodes de preparation: coprecipitation, precipitations successives ou precurseur bimetallique

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The comparison of different preparation procedures of Cu-ZnO catalysts has disclosed the formation of an unidentified copper-zinc phase in the case of precipitation methods. The size of the copper crystallites obtained after reduction is clearly related to the amount to this phase. Moreover, the catalytic activity in methanol synthesis from CO + CO_2 + H_2 mixture depends on the intermediate formation of this phase. The bimetallic precursor leads to catalyst that displays a lower activity correlated to sintering of copper during the reduction step.

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