Common-Ion Effect Triggered Highly Sustained Seawater Electrolysis with Additional NaCl Production
| Autor: | Zhiyi Lu, Shiyuan Wang, Xingheng Zhang, Xiaoming Sun, Wenwen Xu, Yun Kuang, Yang Zhong, Yiyun Du, Congtian Cheng, Zhaolei Wang, Pengsong Li, Imran Ahmed Samo, Xijun Liu, Yang Li, Cheng Wang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Electrolysis
Multidisciplinary Sodium Science Inorganic chemistry chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Anode Common-ion effect chemistry law Chlorine Seawater Solubility 0210 nano-technology Research Article |
| Zdroj: | Research, Vol 2020 (2020) Research |
| ISSN: | 2639-5274 |
| Popis: | Developing efficient seawater-electrolysis system for mass production of hydrogen is highly desirable due to the abundance of seawater. However, continuous electrolysis with seawater feeding boosts the concentration of sodium chloride in the electrolyzer, leading to severe electrode corrosion and chlorine evolution. Herein, the common-ion effect was utilized into the electrolyzer to depress the solubility of NaCl. Specifically, utilization of 6 M NaOH halved the solubility of NaCl in the electrolyte, affording efficient, durable, and sustained seawater electrolysis in NaCl-saturated electrolytes with triple production of H 2 , O 2 , and crystalline NaCl. Ternary NiCoFe phosphide was employed as a bifunctional anode and cathode in simulative and Ca/Mg-free seawater-electrolysis systems, which could stably work under 500 mA/cm 2 for over 100 h. We attribute the high stability to the increased Na + concentration, which reduces the concentration of dissolved Cl - in the electrolyte according to the common-ion effect, resulting in crystallization of NaCl, eliminated anode corrosion, and chlorine oxidation during continuous supplementation of Ca/Mg-free seawater to the electrolysis system. |
| Databáze: | OpenAIRE |
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