Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating
Nickel foam (NF) substrates are widely used to support electrocatalysts, and this is frequently achieved using hydrothermal reactions, where the NF is immersed in the hydrothermal reactor together with the electrocatalyst precursors. However, other reactions including the corrosion of the NF and cha...
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| Language: | English |
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Elsevier
2024-12-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248124001784 |
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| author | Gillian Collins Tara N. Barwa Luke Glennon P. Rupa Kasturi Carmel B. Breslin |
| author_facet | Gillian Collins Tara N. Barwa Luke Glennon P. Rupa Kasturi Carmel B. Breslin |
| author_sort | Gillian Collins |
| collection | DOAJ |
| description | Nickel foam (NF) substrates are widely used to support electrocatalysts, and this is frequently achieved using hydrothermal reactions, where the NF is immersed in the hydrothermal reactor together with the electrocatalyst precursors. However, other reactions including the corrosion of the NF and changes to the pH occur simultaneously, and these can affect the quality of the final electrocatalyst. Herein, a simple approach is devised to minimise these unwanted reactions. Carbon black (CB) was non-covalently functionalised at room temperature using tannic acid to give very stable and good dispersions of fCB in deionised water. Using a simple sonication step, the NF was coated with a uniform layer of the dispersed fCB. This layer served to minimise the corrosion of the underlying NF during the hydrothermal reactions with very good protection observed up to a temperature of 160 °C in deionised water at a pH of 2.0. The corrosion currents of the NF and fCB@NF were estimated at 8.7 µA and 3.9 µA, respectively, at room temperature in this acidic solution. Using a model reaction, the successful nucleation and growth of MnCo2O4 cubes was observed at fCB@NF, but not at the corroding NF. |
| format | Article |
| id | doaj-art-5f8b60a7e3734561b0d34edfba2a7a34 |
| institution | Kabale University |
| issn | 1388-2481 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj-art-5f8b60a7e3734561b0d34edfba2a7a342024-11-28T04:34:24ZengElsevierElectrochemistry Communications1388-24812024-12-01169107835Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coatingGillian Collins0Tara N. Barwa1Luke Glennon2P. Rupa Kasturi3Carmel B. Breslin4Department of Chemistry, Maynooth University, Maynooth, Co. Kildare, IrelandDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare, IrelandDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare, IrelandDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare, IrelandDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare, Ireland; Kathleen Lonsdale Institute, Maynooth University, Maynooth, Co. Kildare, Ireland; Corresponding author at: Department of Chemistry, Maynooth University, Maynooth, Co. Kildare, Ireland.Nickel foam (NF) substrates are widely used to support electrocatalysts, and this is frequently achieved using hydrothermal reactions, where the NF is immersed in the hydrothermal reactor together with the electrocatalyst precursors. However, other reactions including the corrosion of the NF and changes to the pH occur simultaneously, and these can affect the quality of the final electrocatalyst. Herein, a simple approach is devised to minimise these unwanted reactions. Carbon black (CB) was non-covalently functionalised at room temperature using tannic acid to give very stable and good dispersions of fCB in deionised water. Using a simple sonication step, the NF was coated with a uniform layer of the dispersed fCB. This layer served to minimise the corrosion of the underlying NF during the hydrothermal reactions with very good protection observed up to a temperature of 160 °C in deionised water at a pH of 2.0. The corrosion currents of the NF and fCB@NF were estimated at 8.7 µA and 3.9 µA, respectively, at room temperature in this acidic solution. Using a model reaction, the successful nucleation and growth of MnCo2O4 cubes was observed at fCB@NF, but not at the corroding NF.http://www.sciencedirect.com/science/article/pii/S1388248124001784Nickel foamCorrosionpH changesCarbon blackNon-covalent functionalisation |
| spellingShingle | Gillian Collins Tara N. Barwa Luke Glennon P. Rupa Kasturi Carmel B. Breslin Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating Electrochemistry Communications Nickel foam Corrosion pH changes Carbon black Non-covalent functionalisation |
| title | Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating |
| title_full | Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating |
| title_fullStr | Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating |
| title_full_unstemmed | Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating |
| title_short | Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating |
| title_sort | corrosion of nickel foam electrodes during hydrothermal reactions the influence of a simple protective carbon black coating |
| topic | Nickel foam Corrosion pH changes Carbon black Non-covalent functionalisation |
| url | http://www.sciencedirect.com/science/article/pii/S1388248124001784 |
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