In this paper the polarization characteristics of the processes of Ni and Co powders and Ni-Co alloy powders electrodeposition from ammonium sulfate containing supporting electrolyte are investigated as a function of Ni 2+ and Co 2+ ions concentrations. It is shown that the correct polarization curves for Ni and Co powders and Ni-Co alloy powders electrodeposition could be obtained only after IR drop correction, since the total current density of electrodeposition at the most negative potential of -1.4 V versus Ag|AgCl is extremely high (up to about 3-6 A cm -2 ) as a consequence of simultaneous hydrogen evolution which starts immediately after the beginning of metals (alloys) deposition. After determining the current density for hydrogen evolution and its subtraction from the total current density, correct polarization curves for Ni and Co powders and Ni-Co alloy powders electrodeposition are obtained. They are found to be different for each ratio of Ni 2+ /Co 2+ ions concentration. I...t is also concluded that the shape of the polarization curves in all cases is practically defined by the shape of the polarization curve for hydrogen evolution. The morphology and composition of electrodeposited powders were also found to be sensitive to the ratio of Ni 2+ /Co 2+ ions concentration.
TY - JOUR
AU - Jović, Vladimir
AU - Jović, Borka
AU - Pavlović, Miomir
PY - 2006
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4115
AB - In this paper the polarization characteristics of the processes of Ni and Co powders and Ni-Co alloy powders electrodeposition from ammonium sulfate containing supporting electrolyte are investigated as a function of Ni 2+ and Co 2+ ions concentrations. It is shown that the correct polarization curves for Ni and Co powders and Ni-Co alloy powders electrodeposition could be obtained only after IR drop correction, since the total current density of electrodeposition at the most negative potential of -1.4 V versus Ag|AgCl is extremely high (up to about 3-6 A cm -2 ) as a consequence of simultaneous hydrogen evolution which starts immediately after the beginning of metals (alloys) deposition. After determining the current density for hydrogen evolution and its subtraction from the total current density, correct polarization curves for Ni and Co powders and Ni-Co alloy powders electrodeposition are obtained. They are found to be different for each ratio of Ni 2+ /Co 2+ ions concentration. It is also concluded that the shape of the polarization curves in all cases is practically defined by the shape of the polarization curve for hydrogen evolution. The morphology and composition of electrodeposited powders were also found to be sensitive to the ratio of Ni 2+ /Co 2+ ions concentration.
PB - Elsevier
T2 - Electrochimica Acta
T1 - Electrodeposition of Ni, Co and Ni–Co alloy powders
VL - 51
IS - 25
SP - 5468
EP - 5477
DO - 10.1016/j.electacta.2006.02.022
ER -
@article{
author = "Jović, Vladimir and Jović, Borka and Pavlović, Miomir",
year = "2006",
abstract = "In this paper the polarization characteristics of the processes of Ni and Co powders and Ni-Co alloy powders electrodeposition from ammonium sulfate containing supporting electrolyte are investigated as a function of Ni 2+ and Co 2+ ions concentrations. It is shown that the correct polarization curves for Ni and Co powders and Ni-Co alloy powders electrodeposition could be obtained only after IR drop correction, since the total current density of electrodeposition at the most negative potential of -1.4 V versus Ag|AgCl is extremely high (up to about 3-6 A cm -2 ) as a consequence of simultaneous hydrogen evolution which starts immediately after the beginning of metals (alloys) deposition. After determining the current density for hydrogen evolution and its subtraction from the total current density, correct polarization curves for Ni and Co powders and Ni-Co alloy powders electrodeposition are obtained. They are found to be different for each ratio of Ni 2+ /Co 2+ ions concentration. It is also concluded that the shape of the polarization curves in all cases is practically defined by the shape of the polarization curve for hydrogen evolution. The morphology and composition of electrodeposited powders were also found to be sensitive to the ratio of Ni 2+ /Co 2+ ions concentration.",
publisher = "Elsevier",
journal = "Electrochimica Acta",
title = "Electrodeposition of Ni, Co and Ni–Co alloy powders",
volume = "51",
number = "25",
pages = "5468-5477",
doi = "10.1016/j.electacta.2006.02.022"
}
Jović, V., Jović, B.,& Pavlović, M.. (2006). Electrodeposition of Ni, Co and Ni–Co alloy powders. in Electrochimica Acta
Elsevier., 51(25), 5468-5477.
https://doi.org/10.1016/j.electacta.2006.02.022
Jović V, Jović B, Pavlović M. Electrodeposition of Ni, Co and Ni–Co alloy powders. in Electrochimica Acta. 2006;51(25):5468-5477.
doi:10.1016/j.electacta.2006.02.022 .
Jović, Vladimir, Jović, Borka, Pavlović, Miomir, "Electrodeposition of Ni, Co and Ni–Co alloy powders" in Electrochimica Acta, 51, no. 25 (2006):5468-5477,
https://doi.org/10.1016/j.electacta.2006.02.022 . .
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