Over the past decades, various efficient methods based on organometallic homogeneous catalysts have been developed. 在过去的三十多年里，合成化学家们将更多的目光集中到金属有机化合物均相催化剂上，设计合成了许多金属配合物催化剂。
The heterogeneous catalyst first attracts the salt to its surface and holds it there. 多相催化剂先将盐吸附在它的表面并使它固定在那里。
