Electrodeposition of Ni, Co and Ni–Co alloy powders
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. 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.
Keywords:
Ni / Co / Ni–Co alloy powders / Electrodeposition / Polarization curves / Hydrogen evolution / Morphology / Alloy powder compositionSource:
Electrochimica Acta, 2006, 51, 25, 5468-5477Publisher:
- Elsevier
Funding / projects:
DOI: 10.1016/j.electacta.2006.02.022
ISSN: 0013-4686; 1873-3859
WoS: 000240026500030
Scopus: 2-s2.0-33746211267
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Institution/Community
IHTMTY - 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 . .