Transition Metals as Catalysts

A catalyst is a substance that increases the rate of reaction by offering an alternative path that lowers the activation energy.

Two types:

• Homogeneous catalysts - the catalyst is in the same phase as the reactants. They work by using their variable oxidation states to oxidise/reduce a reactant, making it more reactive.

• Heterogeneous catalysts - the catalyst is in a different phase to the reactants. They are usually solids, and they provide a surface for the absorption of molecules. The molecules come together in a more advantageous arrangement. 

Transition metals at catalysts

Examples:

• Iron - the…