英语语法分析

It is known that bimetallic and trimetallic catalysts offer improved properties over single metal catalysts.

已知双金属和三金属催化剂提供了优于单金属催化剂的性能。

The catalysts can divide into two kinds: the transition metal bifunctional catalysts and oxycarbide catalysts of transition metals.

催化剂可以分为两种：过渡金属双官能催化剂和过渡金属的碳氧化物催化剂。

There seem to be two catalysts.

这里面似乎存在两项推动因素。