Chemistry Reference
In-Depth Information
Table 8 (continued)
Au cluster ion
Binding energy eV (kJ mol
1
)
Substrate
Method
Reference
AgAu
4
+
CO
1.01
0.1 (97
10)
c
[
264
]
Ag
2
Au
3
+
CO
0.78
0.1 (75
10)
c
[
264
]
Ag
3
Au
2
(CO)
2
+
CO
0.52
0.1 (50
10)
b
[
267
]
Ag
3
Au
2
(CO)
3
+
CO
0.47
0.1 (45
10)
b
[
267
]
Ag
3
Au
2
CO)
4
+
CO
0.33
0.1 (32
10)
b
[
267
]
Ag
4
Au
+
CO
0.77
0.1 (74
10)
b
[
267
]
Ag
4
Au(CO)
+
CO
0.73
0.1 (70
10)
b
[
267
]
Ag
4
Au(CO)
2
+
CO
0.55
0.1 (53
10)
b
[
267
]
Ag
4
Au(CO)
3
+
CO
0.05
0.1 (5
10)
b
[
267
]
Ag
4
Au(CO)
4
+
CO
0.07
0.1 (7
10)
b
[
267
]
Ag
4
Au(CO)
5
+
CO
0.07
0.1 (7
10)
b
[
267
]
AgAu
5
+
CO
0.96
0.1 (93
10)
c
[
264
]
Ag
2
Au
4
+
CO
0.92
0.1 (89
10)
c
[
264
]
Ag
3
Au
3
+
CO
0.77
0.1 (74
10)
c
[
264
]
Au
2
0.18
0.02 (17
2)
CO
d, e
[
268
]
Au
2
CO
0.38
0.04 (37
4)
d, f
[
268
]
Au
3
CO
0.28
0.04 (27
4)
d, e
[
268
]
Au
3
CO
0.46
0.05 (44
5)
d, f
[
268
]
Au
3
(CO)
CO
0.28
0.1 (27
10)
d
[
266
]
Au
2
O
2
0.60
0.10 (58
10)
d, e
[
268
]
Au
2
O
2
0.93
0.10 (90
10)
d, f
[
268
]
AgAu
O
2
1.10
0.15 (106
14)
d, e
[
268
]
AgAu
O
2
1.59
0.20 (153
19)
d, f
[
268
]
a
Bracketing method
b
Equilibrium measurement
c
Radiative association
d
Kinetic measurement with RRKM modelling
e
Modelled with a tight TS
f
Modelled with a loose TS
Fig. 25 DFT-calculated changes to the gold core structure upon sequential binding of CO to Au
5
+
.
Figure reproduced from [
267
]
(Eq. (
3
)). By examining the role of charge and cluster size, a considerable body of
reactivity patterns has been accumulated. Reactions of bare gold cluster ions are
discussed in Sect.
4.1
and those of ligated clusters in Sect.
4.2
, while mixed metal
clusters are discussed in Sect.
4.3
. Finally complete catalytic cycles are described in
Sect.
4.4
.
