Catalytic properties of the d-block Elements

 D-block Elements or transition metals and their compounds act as catalysts. 

These catalysts are either homogeneous or heterogeneous. 

Applications or uses of transition metals as catalysts:

MnO2 : It is used as a catalyst in the decomposition of KCLO3 to O2 

Platinised asbestos: It is used as a Catalyst in the preparation of H2So4, by oxidising So2 to So3.