Various monovalent cations, such as Cd , Co , Zn , and Ni , are pulse radiolytically generated in aqueous solutions of the corresponding bivalent metal ions, which also contain Ag ions in low concentration. Zn , which has a high negative electrochemical potential, reacts with Ag via electron transfer to yield the free silver atom. Cd and Co , which have less reducing power, form the respective clusters CdAg 2 and CoAg 2 with rate constants of the order of 10 9 M 1 s 1 . It is concluded that the electrochemical potentials of the redox couples Cd2 Cd , Co2 Co , and Ag Ag 0 Ag 0 is a free silver atom lie close together. The mixed metal dusters live only for microseconds as they rapidly react with excess silver ions to yield Cd2 or Co2 and Ag 2 . AS cluster formation and reoxidation occur in the same time range, computer simulations are applied to obtain the rate constants and the absorption spectra of the clusters. CdAg 2 absorbs at 270 and 300 nm; CoAg 2 absorbs at 310 and 550 nm. Neither does Ni transfer an electron to Ag nor is a cluster formed; however, reduction of Ag can occur by products that are formed when the Ni ions disappear
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Ершов et al. (1994) studied this question.