The gadolinium catalyst refers to an elemental gadolinium or gadolinium compound which has a catalytic function. Gadolinium is a silver-white metal that is malleable and magnetic at room temperature. The melting and boiling points of gadolinium are very high. The content of gadolinium in the earth's crust is 0.000636%, mainly in monazite and bastnasite. The chemical nature of gadolinium is stable. Gadolinium does not react in dry air but loses its luster in wet air. Gadolinium can react slowly with water and dissolve in acid to form the corresponding salt. The common valence of gadolinium is +3. Gadolinium oxides and halides have a certain catalytic function and are often used as catalysts.
Figure 1. Gadolinium oxide catalyst
The gadolinium catalyst is not only cheap, but also has high stability and good photodegradability, and is mainly used in environmental protection and organic synthesis.
Figure 2. CdCl3 catalyzes the imino Diels-Alder reaction