Abstract With clean water availability raising a great technological and social challenge, saltwater desalination has become a key strategic solution. Herein, we report a nickel phthalocyanine tetrasulfonic acid tetrasodium salt (NiPcTATS)-based redox flow desalination cell (RFDC) that allows safe, efficient and continuous water-salt separation. With the new, water-soluble NiPcTATS/NiPcTATS+ redox couple as electrolyte, the RFDC effectively desalinates saltwater and achieves a high average salt removal rate of 3.11 gNaCl/(molNiPcTATS·h) and a low energy consumption of 15.0 kJ/molNaCl at 0.5 V cell voltage. The cell exhibits excellent reversibility and durability for long-term operation, benefiting from the fast-redox kinetics and chemical stability of the redox couple. Efficient solar-driven RFDC for water desalination is demonstrated by powering the cell with a solar panel. This RFDC method provides a low-cost, efficient and safe strategy to purify saltwater, and the findings with NiPcTATS-based redox couple offer new opportunities of utilizing metal phthalocyanines and derivatives in water desalination research.

中文翻译：

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用于高性能电化学海水淡化的磺化镍酞菁氧化还原流通池

摘要 随着清洁水的可用性提出了巨大的技术和社会挑战，海水淡化已成为关键的战略解决方案。在此，我们报告了一种基于镍酞菁四磺酸四钠盐 (NiPcTATS) 的氧化还原流动海水淡化电池 (RFDC)，该电池可实现安全、高效和连续的水盐分离。以新型水溶性 NiPcTATS/NiPcTATS+ 氧化还原电对为电解质，RFDC 有效淡化盐水并实现了 3.11 gNaCl/(molNiPcTATS·h) 的高平均脱盐率和 0.5 V 下 15.0 kJ/molNaCl 的低能耗电池电压。得益于氧化还原电对的快速氧化还原动力学和化学稳定性，电池表现出出色的可逆性和耐久性，可长期运行。通过用太阳能电池板为电池供电，证明了用于海水淡化的高效太阳能驱动 RFDC。这种 RFDC 方法提供了一种低成本、高效和安全的盐水净化策略，基于 NiPcTATS 的氧化还原对的发现为在海水淡化研究中利用金属酞菁及其衍生物提供了新的机会。