Table 1.

Bimolecular catalytic reaction

#	Step	Rate constants
1	$A_{\left(g\right)}+o\to a$	kads*
−1	$a\to A_{\left(g\right)}+o$	kdes
2	$aa\to oo+A_{2\left(g\right)}$	kr

^*k_ads is the product of the rate constant of adsorption and the thermodynamic activity (ideally, partial pressure) of A_(g).