Abstract

Design of complex hollow microspheres with double-layered constructions of spinel metal oxides appears to be remarkable in order to supply the need for innovative catalysts. In this study, a CuCo₂O₄ hollow sphere catalyst was developed for the cycloaddition of carbon dioxide to epoxides. Different operating conditions such as reaction temperature, reaction pressure, reaction time, catalyst weight percentage, and various co-catalysts and epoxides are studied in this reaction. Consequently, the optimized operating conditions are achieved including 80 °C, 5 bar, the catalyst weight percentage of 3.2 and 3 h reaction time with the production yield of about 96% for the produced carbonate. The reaction rate was studied to analyze the performance of synthesized catalysts using the activation energies and reaction rate constants along with thermodynamic parameters. The attained double-shell hollow sphere Cu–Co spinel structure revealed remarkable activity and superior production performance as the catalyst for the fixation of carbon dioxide with epoxide.

Graphic Abstract

中文翻译：

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化学固定CO2双壳CuCo2O4空心球催化剂的合成及应用

摘要

为了满足对创新催化剂的需求，设计具有双层尖晶石金属氧化物结构的复杂空心微球似乎非常引人注目。在本研究中，CuCo ₂ O ₄空心球催化剂被开发用于二氧化碳环加成成环氧化物。在该反应中研究了不同的操作条件，如反应温度、反应压力、反应时间、催化剂重量百分比以及各种助催化剂和环氧化物。因此，实现了优化的操作条件，包括 80 °C、5 bar、催化剂重量百分比为 3.2 和反应时间为 3 小时，生成的碳酸盐的产率约为 96%。研究反应速率以使用活化能和反应速率常数以及热力学参数分析合成催化剂的性能。

图形摘要