Ag Nanoparticle‐Induced Surface Chloride Immobilization Strategy Enables Stable Seawater Electrolysis

Abstract Although hydrogen gas (H 2 ) storage might enable offshore renewable energy to be stored at scale, the commercialization of technology for H 2 generation by seawater electrolysis depends upon the development of methods that avoid the severe corrosion of anodes by chloride (Cl − ) ions. Here, it is revealed that the stability of an anode used for seawater splitting can be increased by more than an order of magnitude by loading Ag nanoparticles on the catalyst surface. In experiments, an optimized NiFe‐layered double hydroxide (LDH)@Ag electrode displays stable operation at 400 mA cm −2 in alkaline saline electrolyte and seawater for over 5000 and 2500 h, respectively. The impressive long‐term…

• NN
  National Natural Science Foundation of China

  Awards: 22379154, 52201285, 22105214