7.5 Similar Reactivity of CO and NO
115
Al 2 O
−
4 + CO → Al 2 O
−
3 + CO
−
2 ; Al 2 O
−
3 + CO → Al 2 O
−
2 + CO
−
2
(7.7)
Al 2 O
+
3 + CO → AlO 3 CO + Al
+
; Al 2 O
+
3 + CO → Al 2 O
+
2 + CO 2 ;
Al 2 O
+
2 + CO → Al 2 O
+
+ CO 2
(7.8)
Similar interest was addressed on the reactivity on metal and metal oxide clusters
reacting with NO [89–92]. Figure 7.14 displays four different types of distributions of
nickel and nickel oxide cluster ions/cations which were formed by laser vaporization
of a nickel rod. Several prominent peaks are labelled as Ni x or Ni x O y , and the mass
assignments of the unmarked peaks can be determined by adding or subtracting an
oxygen atom (16 amu) from the peaks labelled in each spectrum.
The reactions of cationic nickel and nickel oxide clusters with NO were studied,
as shown in Fig. 7.15, where the product distributions indicated that several different
Fig. 7.14 Nickel and nickel oxide reactant ion cluster distributions, labeled as Ni x O y : a nickel
cation clusters; b nickel anion clusters; c nickel oxide cation clusters; d nickel oxide anion clusters.
Reproduced with permission from Ref. [89]. Copyright 1999 American Chemical Society