caa a22 4500 477050603 CHVBK 20180405111339.0 cr unu---uuuuu 170330e19960401xx s 000 0 eng 10.1007/BF00251332 doi (NATIONALLICENCE)springer-10.1007/BF00251332 Silver electrocrystallization from a nonpolluting aqueous leaching solution containing ammonia and chloride [Elektronische Daten] [A. Serruya, B. Scharifker, I. González, M. Oropeza, M. Palomar-Pardavé] Silver electrocrystallization from aqueous solutions at pH11, pC10 and pNH3 − 0.2, where Ag(NH3)2 − is the dominant Ag(i) species, has been studied. In spite of the complexities of this medium, the experimental results can be satisfactorily described in terms of multiple nucleation and diffusion-controlled growth of hemispherical nuclei. Nucleation rates, A, and number densities of active sites on the electrode surface, N0, were determined from potentiostatic current transients as a function of overpotential. Saturation number densities of silver nuclei on the electrode surface obtained from the A and N0 values were found to be in excellent agreement with those obtained from the direct, microscopic observation of the electrode surface. Spatial distributions of nuclei were also analysed for silver electrodeposited at different potentials. It was found that nuclei were uniformly distributed when electrodeposited at low overpotentials, whereas inhibition of nucleation close to already established nuclei occurred at higher overpotentials. From the change of the true nucleation rate with overpotential, it was found that the critical nucleus is formed by a single atom within the −100 to −300 mV over-potential range. Chapman & Hall, 1996 Serruya A. Departamento de Química, Universidad Simón Bolívar, Apartado 89000, 1080-A, Caracas, Venezuela aut Scharifker B. Departamento de Química, Universidad Simón Bolívar, Apartado 89000, 1080-A, Caracas, Venezuela aut González I. Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, C.P. 09340, Mexico D.F, Mexico aut Oropeza M. Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, C.P. 09340, Mexico D.F, Mexico aut Palomar-Pardavé M. Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, C.P. 09340, Mexico D.F, Mexico aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/4(1996-04-01), 451-457 0021-891X 26:4<451 1996 26 10800 https://doi.org/10.1007/BF00251332 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00251332 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Serruya A. Departamento de Química, Universidad Simón Bolívar, Apartado 89000, 1080-A, Caracas, Venezuela aut NATIONALLICENCE 700 1- Scharifker B. Departamento de Química, Universidad Simón Bolívar, Apartado 89000, 1080-A, Caracas, Venezuela aut NATIONALLICENCE 700 1- González I. Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, C.P. 09340, Mexico D.F, Mexico aut NATIONALLICENCE 700 1- Oropeza M. Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, C.P. 09340, Mexico D.F, Mexico aut NATIONALLICENCE 700 1- Palomar-Pardavé M. Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, C.P. 09340, Mexico D.F, Mexico aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/4(1996-04-01), 451-457 0021-891X 26:4<451 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer