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Ion sieving membrane for direct seawater anti-precipitation hydrogen evolution reaction electrode.
- Source :
-
Chemical science [Chem Sci] 2023 Oct 07; Vol. 14 (42), pp. 11830-11839. Date of Electronic Publication: 2023 Oct 07 (Print Publication: 2023). - Publication Year :
- 2023
-
Abstract
- In seawater, severe hydroxide-based precipitation on the hydrogen evolution reaction (HER) electrode surface is still a major stumbling block for direct seawater electrolysis. Here, we design a direct seawater HER electrode with excellent anti-precipitation performance based on an Ni(OH) <subscript>2</subscript> nanofiltration membrane in situ grown on nickel foam (NF) at room temperature. The positively charged Ni(OH) <subscript>2</subscript> membrane with nanometer-scale cracks realises an ion sieving function, which apparently hinders the transfer of Mg <superscript>2+</superscript> /Ca <superscript>2+</superscript> ions to suppress precipitation, while rapidly transporting OH <superscript>-</superscript> and H <subscript>2</subscript> O to ensure HER mass transfer. Therefore, the Ni(OH) <subscript>2</subscript> -membrane-decorated seawater HER electrode reduces precipitation by about 98.3% and exhibits high activity and stability. Moreover, in the application of a direct seawater electrolyser and magnesium seawater battery, the Ni(OH) <subscript>2</subscript> membrane-decorated electrode also shows low precipitation and high stability. This work highlights a potential strategy to solve HER electrode precipitation in seawater via an ingenious electrode structure design.<br />Competing Interests: There are no conflicts to declare.<br /> (This journal is © The Royal Society of Chemistry.)
Details
- Language :
- English
- ISSN :
- 2041-6520
- Volume :
- 14
- Issue :
- 42
- Database :
- MEDLINE
- Journal :
- Chemical science
- Publication Type :
- Academic Journal
- Accession number :
- 37920330
- Full Text :
- https://doi.org/10.1039/d3sc04532c