| Download | - View final version: High-performance porous 3D Ni skeleton electrodes for the oxygen evolution reaction (PDF, 11.1 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1016/j.jmrt.2024.10.113 |
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| Author | Search for: Abbasi, Somayyeh; Search for: Guerreiro, Bruno1; Search for: Martin, Manuel H.1; Search for: Gaudet, Julie; Search for: Fakourihassanabadi, Mohsen; Search for: Thorpe, Steven; Search for: Guay, Daniel |
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| Affiliation | - National Research Council Canada. Automotive and Surface Transportation
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| Format | Text, Article |
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| Subject | water splitting; oxygen evolution electrocatalyst; large-scale skeleton electrode; cold spray; shock-wave induced spray; leaching; superaerophobic |
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| Abstract | A key component of green hydrogen production technologies is the fabrication of large-scale porous transport layer (PTL) for use in anion electrolyte membrane water electrolysers (AEMWEs). One strategy to achieve that goal is to manufacture Ni-based 3D electrode skeletons that can be further catalyzed to achieve high current densities at low overpotentials. In the present work, shock-wave induced spray (SWIS) and cold spray (CS) deposition techniques were used to prepare 20 cm² Ni-based electrode skeletons. In our experimental conditions, the porosity of coatings prepared using the SWIS deposition system and Ni powders with particle sizes D50 = 32 and 75 μm never exceeded 28%. Higher porosity could only be achieved using the CS deposition system and a spheroidal Ni–Al powder, whose particles consist of an aluminum core encapsulated in a nickel shell. After Al leaching in an alkaline solution, the resulting electrodes showed good mechanical and structural integrity with up to 41% porosity. The electrochemical active surface area of the most porous electrodes is a factor of 2100 larger than a polished Ni plate, and it has superaerophobic properties with a captive air bubble contact angle of 151°. During 1 h of electrolysis, the overpotential at 100 mA cm−2 of the most active leached Ni–Al cold spray deposited electrode was 330 mV, compared to 380 mV for a Ni foam electrode. |
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| Publication date | 2023-10-16 |
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| Publisher | Elsevier |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 3b134408-8f3c-4049-af0b-6f4455159528 |
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| Record created | 2024-03-22 |
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| Record modified | 2025-04-08 |
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