Functional ligand-modified UiO-66 supported phosphomolybdenum heteropolyacid: an efficient and stable catalyst for oxidative desulfurization of dibenzothiophene

IF 2.1 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2026-06-05 DOI:10.1007/s11144-026-03179-w

Shuang Gao, Yue Yu, Yunheng Li, Lu Han, Yakai Song, Xiaolu Chen

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Abstract

A set of phosphomolybdic acid catalysts was synthesized by employing ligand-functionalized UiO-66 as the support. The structural properties of these catalysts were characterized via XRD, FT-IR, BET, TEM, and XPS techniques. To explore the influence of catalyst structure on its catalytic performance, the desulfurization of dibenzothiophene (DBT) from simulated fuel was utilized as a model reaction. Under optimized reaction parameters, the Co-POM-UiO-66-NO₂-F catalyst exhibited the highest DBT conversion efficiency, achieving 99.3%. After five consecutive desulfurization cycles, the catalyst retained a desulfurization activity of 91.8%. This excellent stability was attributed to the incorporation of the –F group, which enhanced the catalyst’s lipophilicity and hydrophobicity. Additionally, the incorporation of –F groups increased the content of the Mo active species (Mo⁵⁺), regulated the electronic structure of the catalyst, and optimized the microenvironment surrounding the active centers, which collectively contributed to the enhanced catalytic performance.

Graphic abstract

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功能配体修饰UiO-66负载磷钼杂多酸：一种高效稳定的二苯并噻吩氧化脱硫催化剂

以配体功能化的UiO-66为载体，合成了一套磷酸钼酸催化剂。通过XRD、FT-IR、BET、TEM和XPS等技术对催化剂的结构进行了表征。为探讨催化剂结构对其催化性能的影响，以模拟燃料中二苯并噻吩（DBT）的脱硫为模型反应。在优化的反应参数下，Co-POM-UiO-66-NO2-F催化剂的DBT转化率最高，达到99.3%。在连续5次脱硫循环后，催化剂的脱硫活性仍保持在91.8%。这种优异的稳定性归因于-F基团的加入，增强了催化剂的亲脂性和疏水性。此外，-F基团的加入增加了Mo活性物质（Mo5+）的含量，调节了催化剂的电子结构，优化了活性中心周围的微环境，这些都有助于提高催化性能。图形抽象

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.