Journal of CO2 Utilization ( IF 7.2 ) Pub Date : 2023-07-06 , DOI: 10.1016/j.jcou.2023.102530 Chinh Hoang Tran , Ha-Kyung Choi , Eun-Gyeong Lee , Byeong-Ryeol Moon , Wenliang Song , Il Kim
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A series of Prussian blue analogs (PBAs) having a range of crystal structures and compositions was investigated as heterogeneous catalysts for the fixation of carbon dioxide (CO2) to glycidol. The morphology of PBAs was modified, as confirmed by structural characterization, by varying the precipitation method. Of the prepared catalysts, the cubic Zn(II)-Co(III) PBA exhibited the highest catalytic activity (turn-over frequency up to 763 h−1), selectivity (up to 94%), and recyclability for the cycloaddition of CO2 to glycidol. In addition, branched polycarbonate polyols having tunable branching degree (0.15–0.61) and linear polycarbonates of relatively high carbonate content (up to 64.2%) were produced via ring-opening (multibranching) copolymerization of CO2 and various epoxides using a highly amorphous Zn(II)-Co(III) double metal cyanide catalyst. Mechanistic pathways have been proposed by combining experimental results with computational studies.
中文翻译:
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普鲁士蓝类似物作为将二氧化碳固定为缩水甘油以生产碳酸甘油酯和多支链聚碳酸酯多元醇的催化剂
研究了一系列具有一系列晶体结构和组成的普鲁士蓝类似物(PBA)作为将二氧化碳(CO 2)固定为缩水甘油的非均相催化剂。通过改变沉淀方法,结构表征证实了 PBA 的形态得到了改变。在所制备的催化剂中,立方Zn(II)-Co(III) PBA对CO环加成表现出最高的催化活性(周转频率高达763 h -1)、选择性(高达94%)和可回收性2缩水甘油。此外,通过CO的开环(多支化)共聚生产了具有可调支化度(0.15-0.61)的支化聚碳酸酯多元醇和碳酸酯含量相对较高(高达64.2%)的线性聚碳酸酯。2和各种环氧化物,使用高度非晶态的 Zn(II)-Co(III) 双金属氰化物催化剂。通过将实验结果与计算研究相结合,提出了机理途径。