Dehydrogenation of ethanol to acetaldehyde catalyzed by Cu nanoparticles supported on nanorod-shaped La2O2CO3

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-05-09 DOI:10.1016/j.apcata.2025.120334

Chao Tian , Yinghong Yue , Changxi Miao , Weiming Hua , Zi Gao

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引用次数: 0

Abstract

Controllably tuning the morphology of catalysts is an effective solution to enhance the catalytic performance. Herein, we have reported how the shape effect significantly improves the performance of La₂O₂CO₃-supported Cu catalysts in ethanol dehydrogenation to acetaldehyde. Compared with La₂O₂CO₃ nanoparticles-supported Cu catalyst, La₂O₂CO₃ nanorods-supported Cu catalyst (Cu/La₂O₂CO₃-R) considerably improves the activity and stability. The superior performance of Cu/La₂O₂CO₃-R is attributed to its more medium basic sites and stronger interaction between Cu species and {110} surfaces of La₂O₂CO₃ nanorods. Furthermore, DRIFT studies reveal that the support and Cu species perform a synergetic mechanism, with medium basic sites involving into dissociative activation of ethanol and Cu species serving as C−H cleavage of ethoxy intermediate and H₂ liberation sites. The synergetic basic sites with medium strength present on the La₂O₂CO₃ support is helpful for enhancing the intrinsic activity of supported Cu catalyst.

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La2O2CO3纳米棒负载Cu纳米颗粒催化乙醇脱氢制乙醛

可控地调整催化剂的形态是提高催化性能的有效途径。本文中，我们报道了形状效应如何显著提高la2o2co3负载Cu催化剂在乙醇脱氢制乙醛中的性能。与La2O2CO3纳米颗粒负载Cu催化剂相比，La2O2CO3纳米棒负载Cu催化剂（Cu/La2O2CO3- r）的活性和稳定性显著提高。Cu/La2O2CO3- r的优异性能是由于其具有更多的中等碱性位点和Cu与La2O2CO3纳米棒{110}表面之间更强的相互作用。此外，DRIFT研究还揭示了载体和Cu的协同作用机制，其中中碱性位点参与乙醇的解离活化，Cu作为乙氧基中间体的C−H裂解和H2的解离位点。La2O2CO3载体上存在中等强度的协同碱性位点，有利于提高负载Cu催化剂的本征活性。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.