Abstract The catalyst for direct ethanol synthesis (DES) from syngas was investigated in this work, which is Co/La2O3-doped La4Ga2O9. The catalyst was prepared by using LaCo1−xGaxO3 with perovskite phase as the precursor to intensify the interaction in the elements of Co, La and Ga. The catalysts were characterized by using XRD, H2-TPR, TEM, EDS, XPS, BET, ICP and TG techniques. This catalyst showed high selectivity to ethanol and excellent stability including excellent resistance to sintering and carbon deposition. It seems that the ethanol is generated in the interface between metallic Co and La4Ga2O9, and in the interface cobalt would be positively charged due to the interaction between Co nanoparticles and La4Ga2O9. The results and the related discussions indicate that Co/La2O3-doped La4Ga2O9 catalyst is a promising catalyst for DES from syngas. Graphical abstracts.

中文翻译：

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Co/La 2 O 3 掺杂的La 4 Ga 2 O 9 催化剂用于合成气直接合成乙醇

摘要 本工作研究了由合成气直接合成乙醇 (DES) 的催化剂，即 Co/La2O3 掺杂的 La4Ga2O9。该催化剂以钙钛矿相为前驱体的 LaCo1−xGaxO3 为前驱体，以加强 Co、La 和 Ga 元素中的相互作用。使用 XRD、H2-TPR、TEM、EDS、XPS、BET、ICP 对催化剂进行表征和 TG 技术。该催化剂对乙醇表现出高选择性和优异的稳定性，包括优异的抗烧结和抗积碳能力。似乎乙醇是在金属 Co 和 La4Ga2O9 之间的界面中生成的，并且由于 Co 纳米颗粒和 La4Ga2O9 之间的相互作用，在界面中钴将带正电。结果和相关讨论表明，Co/La2O3 掺杂的 La4Ga2O9 催化剂是一种很有前景的合成气 DES 催化剂。图形摘要。