通过掺杂 Zn2+ 调节锰铁氧体的磁性和催化特性：辛醇的气相氧化

IF 3.8 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysts Pub Date : 2023-11-27 DOI:10.3390/catal13121473

Mehnaz Bibi, Muhammad Sadiq, M. Rizk, R. Alsaiari, Z. Iqbal, Zahid Ali

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引用次数: 0

摘要

利用溶胶-凝胶法合成了尖晶铁氧体 ZnFe2O4、MnFe2O4 和 ZnMnFe2O4，并对它们作为催化和磁性材料的潜力进行了深入研究。实验表明，ZnMnFe2O4 具有优异的催化和磁性能，而密度泛函理论（DFT）计算则揭示了 ZnMnFe2O4 与 ZnFe2O4 和 MnFe2O4 相比的优异性能。根据模型反应评估了合成尖晶铁氧体的催化效率，即利用分子氧作为氧化剂将辛醇气相氧化为相应的醛。结果表明，催化活性顺序为 ZnMnFe2O4 > MnFe2O4 > ZnFe2O4。该反应遵循 Langmuir Hinshelwood 的分子氧离解吸附机理。由于混合铁氧体具有极佳的催化和磁性能，因此可扩展到各种有机转化反应中。

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Tuning the Magnetic and Catalytic Properties of Manganese Ferrite through Zn2+ Doping: Gas Phase Oxidation of Octanol

Spinel ferrites, ZnFe2O4, MnFe2O4, and ZnMnFe2O4, were synthesized using the sol–gel method and thoroughly investigated for their potential as catalytic and magnetic materials. Experiments unveiled that ZnMnFe2O4 exhibited excellent catalytic and magnetic properties, whereas the Density Functional Theory (DFT) calculations provided insight into the excellent performance of ZnMnFe2O4 compared with ZnFe2O4 and MnFe2O4. The catalytic efficiencies of the synthesized spinel ferrites were evaluated against a model reaction, i.e., the gas-phase oxidation of octanol to a corresponding aldehyde, utilizing molecular oxygen as an oxidant. The results indicated that the order of catalytic activity was ZnMnFe2O4 > MnFe2O4 > ZnFe2O4. The reaction was found to follow Langmuir Hinshelwood’s mechanism for dissociative adsorption of molecular oxygen. Owing to their superb catalytic and magnetic properties, mixed ferrites can be extended to a variety of organic transformation reactions.

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来源期刊

Catalysts CHEMISTRY, PHYSICAL-

CiteScore

6.80

自引率

7.70%

发文量

1330

审稿时长

3 months

期刊介绍： Catalysts (ISSN 2073-4344) is an international open access journal of catalysts and catalyzed reactions. Catalysts publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.