<s>
The	O
Ziff	O
–	O
Gulari	O
–	O
Barshad	O
(	O
ZGB	O
)	O
model	O
is	O
a	O
simple	O
Monte	B-Algorithm
Carlo	I-Algorithm
method	I-Algorithm
for	O
catalytic	O
reactions	O
of	O
oxidation	O
of	O
carbon	O
monoxide	O
to	O
carbon	O
dioxide	O
on	O
a	O
surface	O
using	O
Monte-Carlo	B-Algorithm
methods	I-Algorithm
which	O
captures	O
correctly	O
the	O
essential	O
dynamics	O
:	O
the	O
phase	O
transition	O
between	O
two	O
poisoned	O
states	O
(	O
either	O
CO2	O
-	O
or	O
O-poisoned	O
)	O
and	O
a	O
steady-state	O
in	O
between	O
.	O
</s>
<s>
The	O
simplest	O
implementation	O
considers	O
the	O
catalyst	O
as	O
simple	O
square	O
two-dimensional	O
lattice	B-Algorithm
,	O
but	O
one	O
can	O
also	O
consider	O
other	O
kinds	O
of	O
underlying	O
lattices	O
.	O
</s>
