Ce-MOFs衍生物CeO<sub>2</sub>的制备及其催化CO<sub>2</sub>和甲醇合成碳酸二甲酯的性能

肖婉婧; 李文杰; 王馨雨; 李心灵; MarcPera-Titus; 邓志勇

doi:10.13801/j.cnki.fhclxb.20250226.003

Ce-MOFs衍生物CeO₂的制备及其催化CO₂和甲醇合成碳酸二甲酯的性能

Preparation of Ce-MOFs derivatives CeO₂ catalysts and performance in the synthesis of dimethyl carbonate from CO₂ and methanol

摘要

摘要: 采用水热法合成了Ce-MOF-808、Ce-UiO-66和Ce-BTC，然后在不同温度下热解制得Ce-MOFs对应的衍生物CeO₂，并用于催化CO₂和甲醇制备碳酸二甲酯(DMC)。利用XRD、N₂等温吸脱附测试、SEM、NH₃-程序升温脱附(TPD)、CO₂-TPD和XPS等技术对催化剂的结构性质进行了表征。在450℃下热解的3种Ce-MOFs衍生物CeO₂均表现最高的氧空位浓度以及催化活性，其中CeO₂-BTC-450的活性最好，DMC时空收率为1.77 mmol·g⁻¹·h⁻¹。本研究提出了一种利用Ce-MOFs作为前驱体来制备高氧空位浓度的CeO₂基催化剂的策略。

Abstract: Ce-MOF-808, Ce-UiO-66 and Ce-BTC were synthesized by hydrothermal method. Then derivatives CeO₂ corresponding to Ce-MOFs was prepared by pyrolysis at different temperatures. Finnally CeO₂ was used as catalyst for synthesis of dimethyl carbonate (DMC) from CO₂ and methanol. The samples were characterized by XRD, N₂ isothermal adsorption and desorption, SEM, NH₃-temperature programmed desorption (TPD), CO₂-TPD and XPS. All the Ce-MOFs derivatives CeO₂ catalysts which pyrolysis at 450℃ exhibited the highest relative oxygen vacancy concentration as well as catalytic activity. Among them, CeO₂-BTC-450 showed the best catalytic activity with a DMC space-time yield of 1.77 mmol·g⁻¹·h⁻¹. In this study, a strategy to prepare CeO₂-based catalysts with high oxygen vacancy concentration by using Ce-MOFs as precursor was proposed.

HTML全文

参考文献(47)

施引文献

资源附件(1)

长摘要

创新点

Ce-MOFs衍生物CeO2的制备及其催化CO2和甲醇合成碳酸二甲酯的性能

Preparation of Ce-MOFs derivatives CeO2 catalysts and performance in the synthesis of dimethyl carbonate from CO2 and methanol

Ce-MOFs衍生物CeO₂的制备及其催化CO₂和甲醇合成碳酸二甲酯的性能

Preparation of Ce-MOFs derivatives CeO₂ catalysts and performance in the synthesis of dimethyl carbonate from CO₂ and methanol