Liang Jie, Li Jun, Dong Hongliang, Li Zixiaozi, He Xun, Wang Yan, Yao Yongchao, Ren Yuchun, Sun Shengjun, Luo Yongsong, Zheng Dongdong, Li Jiong, Liu Qian, Luo Fengming, Wu Tongwei, Chen Guang, Sun Xuping, Tang Bo
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong, China.
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, China.
Nat Commun. 2024 Jul 23;15(1):6208. doi: 10.1038/s41467-024-50519-2.
It is vital to explore effective ways for prolonging electrode lifespans under harsh electrolysis conditions, such as high current densities, acid environment, and impure water source. Here we report alternating electrolysis approaches that realize promptly and regularly repair/maintenance and concurrent bubble evolution. Electrode lifespans are improved by co-action of Fe group elemental ions and alkali metal cations, especially a unique Co-Na combo. A commercial Ni foam sustains ampere-level current densities alternatingly during continuous electrolysis for 93.8 h in an acidic solution, whereas such a Ni foam is completely dissolved in ~2 h for conventional electrolysis conditions. The work not only explores an alternating electrolysis-based system, alkali metal cation-based catalytic systems, and alkali metal cation-based electrodeposition techniques, and beyond, but demonstrates the possibility of prolonged electrolysis by repeated deposition-dissolution processes. With enough adjustable experimental variables, the upper improvement limit in the electrode lifespan would be high.
探索在高电流密度、酸性环境和不纯水源等苛刻电解条件下延长电极寿命的有效方法至关重要。在此，我们报告了交替电解方法，该方法可实现快速且定期的修复/维护以及同时产生气泡。铁族元素离子和碱金属阳离子的共同作用可提高电极寿命，尤其是独特的钴 - 钠组合。在酸性溶液中连续电解93.8小时期间，商用泡沫镍交替维持安培级电流密度，而在传统电解条件下，这样的泡沫镍在约2小时内就会完全溶解。这项工作不仅探索了基于交替电解的系统、基于碱金属阳离子的催化系统和基于碱金属阳离子的电沉积技术等，还证明了通过重复沉积 - 溶解过程延长电解的可能性。有了足够多可调节的实验变量，电极寿命的提升上限将会很高。
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