Abstract AseriesofK-CuZrO2catalysts with different Cu contents were prepared. The catalytic performance and reaction mechanism of 2-pentanone from ethanol condensation were investigated. The structure and properties of the catalysts were studied by N2 sorption, XRD, H2-TPR, CO2-TPD, TEM and XPS. The results showed that when the content of Cu was 9%, the conversion of ethanol reached the maximum (99.5%) due to the strong interaction between CuO and ZrO2 whichpromoted the reduction of CuO and resulted in the largest specific surface area of Cu on the catalyst surface. The selectivity of 2-pentanone reached the maximum (35.0%) because the strongest basicity related to medium-strength basic sites of the catalyst surface were suitable for the condensation reaction. The formation of 2-pentanone on K-CuZrO2 catalyst was speculated on the basis of the analysis of intermediates: ethanol was dehydrogenated to form acetaldehyde. Then, the acetaldehyde was condensed and decomposed to acetone followed by reaction with acetaldehyde to form 2-pentanone.

中文翻译：

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K-CuZrO2催化剂上乙醇生成2-戊酮的研究

摘要 制备了一系列不同Cu含量的K-CuZrO2催化剂。研究了2-戊酮乙醇缩合的催化性能和反应机理。采用N2吸附、XRD、H2-TPR、CO2-TPD、TEM和XPS对催化剂的结构和性能进行了研究。结果表明，当Cu含量为9%时，由于CuO和ZrO2之间的强相互作用促进了CuO的还原，使乙醇的转化率达到最大值（99.5%），从而使Cu的比表面积最大。催化剂表面。2-戊酮的选择性达到最大值（35.0%），因为与催化剂表面中等强度碱性位点相关的最强碱性适合缩合反应。2-戊酮在 K-CuZrO2 催化剂上的形成是基于中间体分析推测的：乙醇脱氢生成乙醛。然后，乙醛缩合并分解为丙酮，然后与乙醛反应形成2-戊酮。