Size-dependent reactivity of nickel-doped silver cluster cations toward oxygen: Electronic and geometric effects
2017
Size-dependent reaction of nickel-doped silver cluster cations (AgN−1Ni+: N = 5–14) was investigated for oxygen as the reactant molecule. A dramatic drop in the reactivity observed for N ≥ 9 is attributed to the encapsulation of the nickel atom, i.e., screening the active site at larger sizes. The reactivity minimum observed at N = 10 is ascribed to the closed electronic shell of Ag9Ni+ formed by 18 valence electrons from Ag5s, Ni4s, and Ni3d, suggesting delocalized d electrons.
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