Regulating Interfacial H 2 O Activity and H 2 Bubbles by Core/Shell Nanoarrays for 800 h Stable Alkaline Seawater Electrolysis

Abstract The catalytic activity and stability under high current densities for hydrogen evolution reactions (HER) are impeded by firm adherence and coverage of H 2 bubbles to the catalytic sites. Herein, we systematically synthesize core/shell nanoarrays to engineer bubble transport channels, which further remarkably regulate interfacial H 2 O activity, and swift H 2 bubble generation and release. The self‐supported catalyst holds uniform ultra‐low Ru active sites of 0.38 wt% and promotes the rapid formation of plentiful small H 2 bubbles, which are rapidly released by the upright channels, mitigating the blockage of active sites and avoiding surface damage from bubble movements. As a result, these core/shell…

• TC
  Tianjin City High School Science and Technology Fund Planning Project

  Award: 21JCZDJC00570
• NN
  National Natural Science Foundation of China

  Awards: 22472049, 22425021
• NK
  National Key Research and Development Program of China

  Award: 2021YFA1500900