Ion sieving membrane for direct seawater anti-precipitation hydrogen evolution reaction electrode.
Ion sieving membrane for direct seawater anti-precipitation hydrogen evolution reaction electrode.
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DOI：
10.1039/d3sc04532c
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发表时间：
2023-11-01
期刊：
影响因子：
8.4
通讯作者：
Wang, Erdong
中科院分区：
文献类型：
--
作者：
Liu, Qianfeng;Yan, Zhao;Gao, Jianxin;Fan, Hefei;Li, Min;Wang, Erdong
在海水中，析氢反应（HER）电极表面严重的氢氧化物沉淀仍然是直接海水电解的主要障碍。在这里，我们基于室温下在泡沫镍（NF）上原位生长的Ni（OH）2纳滤膜，设计了一种具有优异抗沉淀性能的直接海水HER电极。带有纳米级裂纹的带正电的Ni(OH)2膜实现了离子筛分功能，明显阻碍了Mg2+/Ca2+离子的传输以抑制沉淀，同时快速传输OH−和H2O以确保HER传质。因此，Ni(OH)2膜修饰的海水HER电极可减少约98.3%的沉淀，并表现出较高的活性和稳定性。此外，在直接海水电解槽和镁海水电池的应用中，Ni(OH)2膜装饰电极还表现出低沉淀和高稳定性。这项工作突出了通过巧妙的电极结构设计来解决海水中 HER 电极沉淀问题的潜在策略。带正电的 Ni(OH)2 离子筛膜在基于 3D 泡沫镍的海水 HER 电极上原位生长，通过阻碍 Mg2+ 离子的转移来显着减少电极表面的氢氧化物沉淀。
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)2 nanofiltration membrane in situ grown on nickel foam (NF) at room temperature. The positively charged Ni(OH)2 membrane with nanometer-scale cracks realises an ion sieving function, which apparently hinders the transfer of Mg2+/Ca2+ ions to suppress precipitation, while rapidly transporting OH− and H2O to ensure HER mass transfer. Therefore, the Ni(OH)2-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)2 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. A positive charged Ni(OH)2 ion sieving membrane is in situ grown on 3D nickel foam based seawater HER electrode to dramatically reduce hydroxide-based precipitation on the electrode surface via hindering the transfer of Mg2+ ion.
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影响因子：
3.3
作者：
Auinger, Michael;Katsounaros, Ioannis;Mayrhofer, Karl J. J.
通讯作者：
Mayrhofer, Karl J. J.
影响因子：
15.1
作者：
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影响因子：
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Hu J;Tang X;Dai Q;Liu Z;Zhang H;Zheng A;Yuan Z;Li X
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Li X
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22
作者：
Dresp, Soeren;Dionigi, Fabio;Strasser, Peter
通讯作者：
Strasser, Peter
影响因子：
16.6
作者：
Danilovic, N.;Subbaraman, Ram;Markovic, Nenad M.
通讯作者：
Markovic, Nenad M.