Expanded Negative Electrostatic Network-Assisted Seawater Oxidation and High-Salinity Seawater Reutilization

Coastal/offshore renewable energy sources combined with seawater splitting offer an attractive means for large-scale H2 electrosynthesis in the future. However, designing anodes proves rather challenging, as surface chlorine chemistry must be blocked, particularly at high current densities (J). Additionally, waste seawater with increased salinity produced after long-term electrolysis would impair the whole process sustainability. Here, we convert seawater to O2 selectively, on hydroxides, by building phytate-based expanded negative electrostatic networks (ENENs) with electrostatically repulsive capacities and higher negative charge coverage ranges than those of common inorganic polyatomic anions. With surface…

• NN
  National Natural Science Foundation of China

  Awards: 52202214, 21927811
• NS
  Natural Science Foundation of Sichuan Province

  Award: 2023NSFSC0954
• SA
  Science and Technology Plan Projects of Tibet Autonomous Region

  Award: XZ202201ZY0002G