Enhanced oxygen evolution reaction in hierarchical NiFe/NiO electrocatalysts: Effects of electrodeposition condition on electrode
This study fabricated an OER electrocatalyst with a hierarchical structure by electrodepositing Ni-Fe on NiO. The prepared electrocatalyst exhibited high activity and stability. Furthermore, the OER characteristics of the NiFe/NiO electrode were investigated by changing the metal (Ni and Fe) concent...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248124000110 |
| _version_ | 1827336655420260352 |
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| author | Jae-Hee Jeon Ji-Eun Kim Tae-Hyun Kim Chu-Sik Park Kwangjin Jung Jaekyung Yoon Joonho Kim Young-Ho Kim Kyoung-Soo Kang |
| author_facet | Jae-Hee Jeon Ji-Eun Kim Tae-Hyun Kim Chu-Sik Park Kwangjin Jung Jaekyung Yoon Joonho Kim Young-Ho Kim Kyoung-Soo Kang |
| author_sort | Jae-Hee Jeon |
| collection | DOAJ |
| description | This study fabricated an OER electrocatalyst with a hierarchical structure by electrodepositing Ni-Fe on NiO. The prepared electrocatalyst exhibited high activity and stability. Furthermore, the OER characteristics of the NiFe/NiO electrode were investigated by changing the metal (Ni and Fe) concentration and Ni:Fe ratio in the plating bath. As the plating bath concentration decreased, NiFe-layered double hydroxide was prominently formed due to an increase in local pH. The electrode obtained using a relatively low plating bath concentration of 130 mM demonstrated high activity with an overpotential of 245 mV and Tafel slope of 27.6 mV dec-1 at a current density of 10 mA/cm2. When the Ni:Fe ratio in the plating bath was adjusted, OER activity increased as the Fe content of the electrode increased to approximately 20.9 at.%, and as the Fe content increased beyond that, the activity gradually decreased. Fe inhibits Ni oxidation and acts as an active site owing to Fe3+ substitution in the γ-NiOOH structure, resulting in increased OER activity. However, when the Fe content was > 29 at.%, the inactive phase γ-FeOOH predominantly grew and the OER activity decreased. |
| first_indexed | 2024-03-07T18:36:07Z |
| format | Article |
| id | doaj.art-5007afad06cd4af386bd5d3797ba371d |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-03-07T18:36:07Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-5007afad06cd4af386bd5d3797ba371d2024-03-02T04:53:47ZengElsevierElectrochemistry Communications1388-24812024-03-01160107668Enhanced oxygen evolution reaction in hierarchical NiFe/NiO electrocatalysts: Effects of electrodeposition condition on electrodeJae-Hee Jeon0Ji-Eun Kim1Tae-Hyun Kim2Chu-Sik Park3Kwangjin Jung4Jaekyung Yoon5Joonho Kim6Young-Ho Kim7Kyoung-Soo Kang8Hydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Republic of Korea; Department of Chemical Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Republic of KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Republic of KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Republic of KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Republic of KoreaHydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Republic of KoreaDepartment of H2 & Smart Business, Korea Hydro & Nuclear Power, 70 Yuseong-daero 1312 beon-gil, Yuseong-gu, Daejeon 34101, Republic of KoreaDepartment of Chemical Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea; Corresponding authors.Hydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Republic of Korea; Corresponding authors.This study fabricated an OER electrocatalyst with a hierarchical structure by electrodepositing Ni-Fe on NiO. The prepared electrocatalyst exhibited high activity and stability. Furthermore, the OER characteristics of the NiFe/NiO electrode were investigated by changing the metal (Ni and Fe) concentration and Ni:Fe ratio in the plating bath. As the plating bath concentration decreased, NiFe-layered double hydroxide was prominently formed due to an increase in local pH. The electrode obtained using a relatively low plating bath concentration of 130 mM demonstrated high activity with an overpotential of 245 mV and Tafel slope of 27.6 mV dec-1 at a current density of 10 mA/cm2. When the Ni:Fe ratio in the plating bath was adjusted, OER activity increased as the Fe content of the electrode increased to approximately 20.9 at.%, and as the Fe content increased beyond that, the activity gradually decreased. Fe inhibits Ni oxidation and acts as an active site owing to Fe3+ substitution in the γ-NiOOH structure, resulting in increased OER activity. However, when the Fe content was > 29 at.%, the inactive phase γ-FeOOH predominantly grew and the OER activity decreased.http://www.sciencedirect.com/science/article/pii/S1388248124000110Alkaline water electrolysisOxygen evolution reactionElectrocatalystMetal-hydroxide electrodepositionNi-Fe hydroxideElectrodeposition condition |
| spellingShingle | Jae-Hee Jeon Ji-Eun Kim Tae-Hyun Kim Chu-Sik Park Kwangjin Jung Jaekyung Yoon Joonho Kim Young-Ho Kim Kyoung-Soo Kang Enhanced oxygen evolution reaction in hierarchical NiFe/NiO electrocatalysts: Effects of electrodeposition condition on electrode Electrochemistry Communications Alkaline water electrolysis Oxygen evolution reaction Electrocatalyst Metal-hydroxide electrodeposition Ni-Fe hydroxide Electrodeposition condition |
| title | Enhanced oxygen evolution reaction in hierarchical NiFe/NiO electrocatalysts: Effects of electrodeposition condition on electrode |
| title_full | Enhanced oxygen evolution reaction in hierarchical NiFe/NiO electrocatalysts: Effects of electrodeposition condition on electrode |
| title_fullStr | Enhanced oxygen evolution reaction in hierarchical NiFe/NiO electrocatalysts: Effects of electrodeposition condition on electrode |
| title_full_unstemmed | Enhanced oxygen evolution reaction in hierarchical NiFe/NiO electrocatalysts: Effects of electrodeposition condition on electrode |
| title_short | Enhanced oxygen evolution reaction in hierarchical NiFe/NiO electrocatalysts: Effects of electrodeposition condition on electrode |
| title_sort | enhanced oxygen evolution reaction in hierarchical nife nio electrocatalysts effects of electrodeposition condition on electrode |
| topic | Alkaline water electrolysis Oxygen evolution reaction Electrocatalyst Metal-hydroxide electrodeposition Ni-Fe hydroxide Electrodeposition condition |
| url | http://www.sciencedirect.com/science/article/pii/S1388248124000110 |
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