Question

Which of the following steps occur in mechanism of heterogenous catalysis:

• A. Diffusion of reactant(s) to the surface of the catalyst.
• B. Adsorption of reactant molecules on the surface of the catalyst.
• C. Occurrence of chemical reaction on the catalyst’s surface through formation of an intermediate.
• D. All of the above.

Answer 1

The correct option is D All of the above.

Mechanism of Heterogenous Catalysis
Step 1:

Diffusion of reactant(s) to the surface of the catalyst.

Step 2:

Adsorption of reactant molecules on the surface of the catalyst.

Step 3:

Occurrence of chemical reaction on the catalyst’s surface through formation of an intermediate.

Step 4:

Desorption of reaction products
from the catalyst surface, and thereby, making the surface available again for more reaction to occur.

Step 5:

Diffusion of reaction products away from the catalyst’s surface.