Surface oxygen vacancy-dependent and solvent effect on selective oxidation of benzyl alcohol to benzaldehyde over spinel CuMn2O4 with molecular oxygen

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Molecular Catalysis Pub Date : 2025-05-03 DOI:10.1016/j.mcat.2025.115172

Weitao Wang , Kang Wang , Huan Wang , Jiaqi Zhu , Zhen-Hong He , Zhao-Tie Liu

引用次数: 0

Abstract

Selective oxidation of benzyl alcohol to benzaldehyde with molecular oxygen is a typical oxidation in synthetic chemistry. In present, Mn-Cu bimetal oxide spinel catalyst was prepared and characterized. The content of surface oxygen vacancies can be adjusted by the molar ratio of Cu to Mn during the preparation process and oxygen vacancies were found positively related to the activity of entitled reaction. The solvent effect on the reaction is investigated. The reaction conditions of the entitled reaction were optimized and the conversion of benzyl alcohol can reach 98.5 % with 100 % selectivity to benzaldehyde at 70°C for 8 h. The catalyst is stable and can be reused for 5 times without any significant decrease in its catalytic performance. In addition, the reaction was studied from the aspect of kinetic to reveal the reason of high selectivity.

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表面氧空位依赖性和溶剂对尖晶石CuMn2O4选择性氧化苯甲醇制苯甲醛的影响

分子氧选择性氧化苯甲醇制苯甲醛是合成化学中一种典型的氧化反应。目前制备了锰铜双金属氧化物尖晶石催化剂并对其进行了表征。在制备过程中，Cu与Mn的摩尔比可以调节表面氧空位的含量，并且氧空位与标题反应的活性呈正相关。考察了溶剂对反应的影响。对反应条件进行了优化，在70℃条件下反应8 h，苯甲醇的转化率可达98.5%，选择性为100%。催化剂性能稳定，可重复使用5次，催化性能无明显下降。此外，从动力学角度对反应进行了研究，揭示了反应具有高选择性的原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods