稀土基催化剂催化CO_(2)研究进展

Research progress in catalysis of CO_(2)by rare earth based catalysts

相比于过渡金属及主族金属,稀土金属具有亲氧性,且配合物大多具有高的路易斯酸性,稀土离子配位数大且多变,配位模式多样,更容易形成复杂的多核结构。从CO_(2)还原为低碳物种、CO_(2)与有机分子化学固定生成环碳酸酯、CO_(2)与环氧化物共聚生成聚碳酸酯3个方面概述了稀土基催化剂在催化固定二氧化碳方面取得的进展。

Compared to transition and main group metals,rare earth metals possess oxygen affinity,and their complexes often exhibit high Lewis acidity.Rare earth ions have large and variable coordination numbers,diverse coordination modes,and are more prone to form complex multinuclear structures.These advantages have led to the widespread application of rare earth-based metal catalysts.In this regard,the progress on rare earth-based catalysts in catalytic fixation of carbon dioxide can be summarized in three aspects:the reduction of CO_(2)to low-carbon species,the chemical fixation of CO_(2)with organic molecules to form cyclic carbonates,and the copolymerization of CO_(2)with epoxides to produce polycarbonates.