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Effect of Plating Variables on Oxygen Evolution Reaction of Ni–Zn–Fe Electrodes for Alkaline Water Electrolysis
| Content Provider | MDPI |
|---|---|
| Author | Lee, Su-Han Kim, Ji Eun Joo, Hyunku Park, Chu-Sik Jeong, Seong-Uk Jung, Kwangjin Kim, Young-Ho Kang, Kyoung-Soo |
| Copyright Year | 2022 |
| 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 $mA/cm^{2}$, 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 $mA/cm^{2}$ 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. |
| Starting Page | 346 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal12030346 |
| Journal | Catalysts |
| Issue Number | 3 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-03-18 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Hydrogen Alkaline Water Electrolysis Oxygen Evolution Reaction |
| Content Type | Text |
| Resource Type | Article |
