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<p>The development of efficient catalyst for the epoxidation of alkenes is crucial in industrial application. Herein, bismuth molybdate samples with different surface properties (BMO-<i>x</i>, <i>x</i>&#xa0;=&#xa0;A, B, and C) were synthesized <i>via</i> a hydrothermal method and tested in cyclohexene epoxidation. The BMO-A catalyst exhibited superior catalytic activity, achieving a 67.3% cyclohexene conversion with 83.6% epoxide selectivity, outperforming the BMO-B (17.4% conversion, 40.2% selectivity) and BMO-C (27.0% conversion, 59.1% selectivity) catalysts. This enhanced activity is attributed to BMO-A’s higher percentage of surface exchangeable oxygen, high surface Mo/Bi ratio, and optimal surface wettability. The high epoxidation performance of the BMO-A catalyst was attributed to its larger percentage of surface exchangeable oxygen, high surface Mo/Bi ratio, and suitable surface wettability. Specifically, the BMO-A with more exchangeable oxygen facilitated the adsorption of H<sub>2</sub>O<sub>2</sub> molecules, and subsequent reaction with cyclohexene to yield epoxy-cyclohexane. The hydrophilic surface of BMO-A further enhanced H<sub>2</sub>O<sub>2</sub> enrichment at the reaction interface. This work provides a new strategy for preparing highly active catalyst for the epoxidation of alkenes.</p> Graphical Abstract <p></p>

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Investigation of Catalytic Performance of γ-Bi2MoO6 Material on the Epoxidation of the Cyclohexene

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Lei Zhang,
  • Zhihao Shu,
  • Ji’E Tang,
  • Xinmiao Wang,
  • Bin Xie,
  • Tiandi Tang

摘要

The development of efficient catalyst for the epoxidation of alkenes is crucial in industrial application. Herein, bismuth molybdate samples with different surface properties (BMO-x, x = A, B, and C) were synthesized via a hydrothermal method and tested in cyclohexene epoxidation. The BMO-A catalyst exhibited superior catalytic activity, achieving a 67.3% cyclohexene conversion with 83.6% epoxide selectivity, outperforming the BMO-B (17.4% conversion, 40.2% selectivity) and BMO-C (27.0% conversion, 59.1% selectivity) catalysts. This enhanced activity is attributed to BMO-A’s higher percentage of surface exchangeable oxygen, high surface Mo/Bi ratio, and optimal surface wettability. The high epoxidation performance of the BMO-A catalyst was attributed to its larger percentage of surface exchangeable oxygen, high surface Mo/Bi ratio, and suitable surface wettability. Specifically, the BMO-A with more exchangeable oxygen facilitated the adsorption of H2O2 molecules, and subsequent reaction with cyclohexene to yield epoxy-cyclohexane. The hydrophilic surface of BMO-A further enhanced H2O2 enrichment at the reaction interface. This work provides a new strategy for preparing highly active catalyst for the epoxidation of alkenes.

Graphical Abstract