Consider the following catalytic reaction:
2A ? B + C
Species A & C were adsorbed on the surface. The following steps take place:
A + S ? A.S (use KA for the equilibrium constant)
A.S + A.S ? B(g) + C.S (irreversible)
C.S ? C + S (use KD = 1/KC for the equilibrium constant)
Assuming the surface reaction is the rate limiting step, derive the rate law as a function of partial pressures.