A surface catalyst will create a new reaction intermediate when the substrate interacts with the catalyst.
In addition, the surface catalyst will do which of the following?
The stationary nature of the catalyst ensures it is not used up before the reaction is complete, resulting in a lower overall energy for the system.
When the reactants slide past the surface catalyst, some of the reactants interact immediately, resulting in a product that releases excess energy to the system. This, in turn, is used to affect the rate of the rest of the reactants that are not able to interact with the catalyst.
The catalyst increases the probability of successful collisions, resulting in a faster rate due to the larger surface area and stationary nature of the catalyst.
The catalyst decreases the energy of the reaction by allowing better mixing of the catalyst with the reactant in a homogeneous solution.