Copper-based catalysts have been widely considered in the non-oxidative dehydrogenation of ethanol but suffer from deactivation troubles. Herein, a hierarchical echinus-like Cu-MFI-AE catalyst was developed, which exhibited a high yield of acetaldehyde and unprecedented stability. The formation of Cu–O–Si on the interface of Cu and hierarchical MFI avoids the aggregation of Cu nanoparticles and stabilizes the Cu⁺ species. The Cu⁺ and Cu⁰ species perform a synergetic mechanism, with Cu⁺ involving into acetaldehyde generation and Cu⁰ serving as H₂ liberation sites. The utilization of interfacial interactions is an effective method in stabilizing metal nanoparticles without affecting the active sites for ethanol conversion.

中文翻译：

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用于乙醇脱氢的分层棘手类Cu-MFI催化剂

铜基催化剂已在乙醇的非氧化脱氢中被广泛考虑，但存在失活的麻烦。在本文中，开发了一种分级的像海胆类的Cu-MFI-AE催化剂，其显示出高的乙醛产率和空前的稳定性。在Cu和分层MFI界面上形成Cu–O–Si避免了Cu纳米粒子的聚集并稳定了Cu ⁺物种。Cu ⁺和Cu ⁰具有协同作用，其中Cu ⁺参与乙醛的生成，而Cu ⁰作为H _2。解放场所。界面相互作用的利用是稳定金属纳米颗粒而不影响乙醇转化的活性位点的有效方法。