High‐Performance Alkaline Seawater Electrolysis with Anomalous Chloride Promoted Oxygen Evolution Reaction

Abstract A highly selective and durable oxygen evolution reaction (OER) electrocatalyst is the bottleneck for direct seawater splitting because of side reactions primarily caused by chloride ions (Cl − ). Most studies about OER catalysts in seawater focus on the repulsion of the Cl − to reduce its negative effects. Herein, we demonstrate that the absorption of Cl − on the specific site of a popular OER electrocatalyst, nickel‐iron layered double hydroxide (NiFe LDH), does not have a significant negative impact; rather, it is beneficial for its activity and stability enhancement in natural seawater. A set of in situ characterization techniques reveals that the adsorption of Cl − on the desired Fe site…

• UO
  University of Adelaide
• CA
  Chinese Academy of Sciences
• YI
  Youth Innovation Promotion Association of the Chinese Academy of Sciences

  Award: Y2022006
• AR
  Australian Research Council

  Awards: FT200100062, DP190103472, DP230102027, DP220102596, FL170100154, FL170100154, FT200100062, DP230102027, DP220102596, and DP190103472
• YI
  Youth Innovation Promotion Association
• BS
  Beijing Synchrotron Radiation Facility