Try by yourself!
CO (and CO+O) on metal surfaces
Side view
CO
Sketch
Cu (110)(2 ×1)− CO
Ag (111)(2 ×1)− O
(
)
Si (111) 3 × 3 R 30°− Ag
CO
O
b2
( )
2 0
1 2
a2
a1
2 0
0 1
b2
b1
a2
b1
( )
b2
a1
fcc(111) c(2 x 4) - 2 CO
fcc(111) p(2 x 1) - 1 CO
b2
a2
a1
b1
( )
2 0
2 4
b1
b1
( )
-2 -2
1 -1
a1
a2
b2
a1
b1
a2
( )
1 0
0 2
fcc(111) p(2 x 4) - 5 CO
or, following a convention by
Biberian & van Hove, Surf. Sci. 138 (1984) 361,
fcc(111) p(2 x 2 sqrt(3) ) rect - 5 CO
b2
bcc(110) p(1 x 2) - 1 CO
a1
bcc(110) c(4 x 4) - 4 CO
a2
If you look closely,
you’ll see that these surfaces
are not fcc(111) but bcc(110)!
I have provided solutions
for both cases.
( )
-2 -2
2 -2
bcc(110) c(4 x 4) - 10 CO
fcc(111) c(2 x 4) - 2 CO
bcc(110) c(4 x 4) - 4 CO
(same as above,
but different adsorbate sites)
( )
2 0
0 2
a2
a1
a1
a2
fcc(111) p(2 x 2) - 1 CO
or fcc(111) c(2 x 2 sqrt(2) )rect - 2 CO
a1
a2
( )
2 0
0 2
a2
a1
bcc(110) p(2 x 2) - 1 CO
If you look closely,
you’ll see that these surfaces
are not fcc(111) but bcc(110)!
I have provided solutions
for both cases.
fcc(111) c(2 x 12) - 13 CO
or fcc(111) p(2 x 3 sqrt(2) )rect - 6 CO
( )
2 0
1 6
bcc(110) c(12 x 12)
( )
-3 3
-2 -2
( )
( )
2 -2
2 2
2 0
1 2
a2
a2
a1
a1
fcc(111) c(2 x 4) - 4 CO
or fcc(111) p(2 x sqrt(3) )rect - 2 CO
a1
a2
CO
O
( )
1 -1
-2 -2
fcc(111) c(4 x 4) - 4 CO + 2 O
a1
( )
4 0
0 2
a2
bcc(110) c(4 x 4) - 6 CO
CO
O
bcc(110) p(4 x 2) - 2 CO + 1 O
fcc(110) c(2 x 2) - 2 CO