Lattice-Confined Cu-TiO2 Catalysts with Significantly Improved Activity and Thermal Stability for CO2 Hydrogenation,ACS Sustainable Chemistry & Engineering

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Lattice-Confined Cu-TiO2 Catalysts with Significantly Improved Activity and Thermal Stability for CO2 Hydrogenation
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-12-14 , DOI: 10.1021/acssuschemeng.3c06781
Hanming Chen ₁ , Shuyi Li ₁ , Peijie Ma ₂ , Kuan Chang ₁ , Zhiying Zhao ₁ , Yingjie Lai ₁ , Kun Zheng ₂ , Qin Kuang ₁ , Zhaoxiong Xie _{1,

3}

Affiliation

Cu-based catalysts have shown promising prospects in the CO₂ hydrogenation reaction but suffer from a significant sintering problem, especially under high temperatures and a reducing atmosphere. Herein, we propose a lattice confinement strategy to fabricate a highly dispersed and thermally stable Cu-TiO₂ catalyst through a facile ion exchange and calcination reconstruction method. The intrinsic CH₃OH formation rate for the optimal Cu-TiO₂-600 catalyst reached 55.5 mmol g_Cu^–1 h^–1 at 240 °C and 3 MPa. The structural analysis demonstrated that the catalyst maintained an excellent Cu dispersion even at 400 °C and H₂ conditions, which exhibited an outstanding sintering resistance property and achieved high activity and thermal stability for CO₂ hydrogenation. This work could be potentially extended to construct other lattice-confined catalysts in a heterogeneous catalytic reaction.

中文翻译：

晶格限制的 Cu-TiO2 催化剂显着提高 CO2 加氢活性和热稳定性

铜基催化剂在CO ₂加氢反应中显示出良好的前景，但存在严重的烧结问题，特别是在高温和还原气氛下。在此，我们提出了一种晶格限制策略，通过简单的离子交换和煅烧重建方法来制造高度分散且热稳定的Cu-TiO ₂催化剂。最佳Cu-TiO ₂ -600催化剂的本征CH ₃ OH生成速率在240 °C和3 MPa下达到55.5 mmol g _Cu^–1 h ^–1。结构分析表明，该催化剂即使在400℃和H ₂条件下仍保持优异的Cu分散性，表现出优异的抗烧结性能，并实现了高的CO ₂加氢活性和热稳定性。这项工作可能会扩展到在非均相催化反应中构建其他晶格限制的催化剂。

更新日期：2023-12-14

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