The oxidative dehydrogenation (ODH) of ethanol over Ag and AgLi catalyst anchored on unmodified and modified (aluminated) montmorillonite (MT) clay was studied. The results indicate that AgLi formulations anchored on aluminated MT were effective for acetaldehyde production, while unmodified formulations favored ethylene production. Characterization studies indicate that the catalyst activity is regulated by the crystalline size of the silver clusters and the amount of weak basic sites present in the support. The synergism observed is rationalized in terms of a Ag re-dispersion mechanism probed through operando and in situ UV–vis analysis.

中文翻译：

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铝改性的银/蒙脱土在乙醇氧化脱氢中促进锂

研究了在未改性和改性（铝化）蒙脱土（MT）粘土上锚固的Ag和AgLi催化剂上乙醇的氧化脱氢（ODH）。结果表明，锚定在铝化MT上的AgLi配方可有效生产乙醛，而未改性的配方则有利于乙烯生产。表征研究表明，催化剂活性受银团簇的晶体大小和载体中弱碱性位点的数量调节。通过操作和现场UV-vis分析探测到的银再分散机制，观察到的协同作用是合理的。