Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water Electrolysis
In this study, we investigated the oxygen evolution reaction (OER) characteristics of Ni–Zn–Fe electrodes by varying plating current density and Ni:Fe ratio in a plating bath. The activity of the OER increased up to the plating current density of 160 mA/cm<sup>2</sup>, as the Fe content...
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MDPI AG
2022-03-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/12/3/346 |
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| author | Su-han Lee Ji Eun Kim Hyunku Joo Chu-sik Park Seong-uk Jeong Kwangjin Jung Young-ho Kim Kyoung-soo Kang |
| author_facet | Su-han Lee Ji Eun Kim Hyunku Joo Chu-sik Park Seong-uk Jeong Kwangjin Jung Young-ho Kim Kyoung-soo Kang |
| author_sort | Su-han Lee |
| collection | DOAJ |
| description | In this study, we investigated the oxygen evolution reaction (OER) characteristics of Ni–Zn–Fe electrodes by varying plating current density and Ni:Fe ratio in a plating bath. The activity of the OER increased up to the plating current density of 160 mA/cm<sup>2</sup>, as the Fe content of the deposited electrode increased and electrochemical surface area (ECSA) increased after Zn dealloying. However, for the plated electrode with higher than 160 mA/cm<sup>2</sup> of current density, the change in composition caused by underpotential deposition led to decreased activity due to decreasing Fe content and diminishing Zn dealloying. Moreover, when the Ni:Fe ratio in the plating bath was varied, outstanding OER activity was observed at Ni:Fe = 2:1. When the Fe content of the bath increased beyond this ratio, Fe could not restrain Ni oxidation and formed Fe oxides in OER reaction, and oxygen vacancy decreased. These caused a degradation of the OER activity. |
| first_indexed | 2024-03-09T20:01:58Z |
| format | Article |
| id | doaj.art-7edea054c2a94e37aa80704ef8007578 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T20:01:58Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
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| series | Catalysts |
| spelling | doaj.art-7edea054c2a94e37aa80704ef80075782023-11-24T00:43:13ZengMDPI AGCatalysts2073-43442022-03-0112334610.3390/catal12030346Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water ElectrolysisSu-han Lee0Ji Eun Kim1Hyunku Joo2Chu-sik Park3Seong-uk Jeong4Kwangjin Jung5Young-ho Kim6Kyoung-soo Kang7Hydrogen Energy Research Center, Korea Institute of Energy Research, Daejeon 34129, KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, Daejeon 34129, KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, Daejeon 34129, KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, Daejeon 34129, KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, Daejeon 34129, KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, Daejeon 34129, KoreaDepartment of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, Daejeon 34129, KoreaIn this study, we investigated the oxygen evolution reaction (OER) characteristics of Ni–Zn–Fe electrodes by varying plating current density and Ni:Fe ratio in a plating bath. The activity of the OER increased up to the plating current density of 160 mA/cm<sup>2</sup>, as the Fe content of the deposited electrode increased and electrochemical surface area (ECSA) increased after Zn dealloying. However, for the plated electrode with higher than 160 mA/cm<sup>2</sup> of current density, the change in composition caused by underpotential deposition led to decreased activity due to decreasing Fe content and diminishing Zn dealloying. Moreover, when the Ni:Fe ratio in the plating bath was varied, outstanding OER activity was observed at Ni:Fe = 2:1. When the Fe content of the bath increased beyond this ratio, Fe could not restrain Ni oxidation and formed Fe oxides in OER reaction, and oxygen vacancy decreased. These caused a degradation of the OER activity.https://www.mdpi.com/2073-4344/12/3/346hydrogenalkaline water electrolysisoxygen evolution reaction |
| spellingShingle | Su-han Lee Ji Eun Kim Hyunku Joo Chu-sik Park Seong-uk Jeong Kwangjin Jung Young-ho Kim Kyoung-soo Kang Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water Electrolysis Catalysts hydrogen alkaline water electrolysis oxygen evolution reaction |
| title | Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water Electrolysis |
| title_full | Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water Electrolysis |
| title_fullStr | Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water Electrolysis |
| title_full_unstemmed | Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water Electrolysis |
| title_short | Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water Electrolysis |
| title_sort | effect of plating variables on oxygen evolution reaction of ni zn fe electrodes for alkaline water electrolysis |
| topic | hydrogen alkaline water electrolysis oxygen evolution reaction |
| url | https://www.mdpi.com/2073-4344/12/3/346 |
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