Atomic-level Ru-Ir mixing in rutile-type (RuIr)O2 for efficient and durable oxygen evolution catalysis

Abstract The success of proton exchange membrane water electrolysis (PEMWE) depends on active and robust electrocatalysts to facilitate oxygen evolution reaction (OER). Heteroatom-doped-RuO x has emerged as a promising electrocatalysts because heteroatoms suppress lattice oxygen participation in the OER, thereby preventing the destabilization of surface Ru and catalyst degradation. However, identifying suitable heteroatoms and achieving their atomic-scale coupling with Ru atoms are nontrivial tasks. Herein, to steer the reaction pathway away from the involvement of lattice oxygen, we integrate OER-active Ir atoms into the RuO 2 matrix, which maximizes the synergy between stable Ru and active Ir centers, by…

• NR
  National Research Foundation

  Award: 2019R1A6A1A11044070
• PU
  Pohang University of Science and Technology
• MO
  Ministry of Trade, Industry and Energy

  Award: RS-2023-00261088
• KI
  Korea Institute of Science and Technology
• KI
  Korea Institute of Science and Technology Information
• KB
  Korea Basic Science Institute

  Award: A424100
• NR
  National Research Foundation of Korea

  Awards: 2021M3H4A1A02042948, RS-2017-NR023047, RS-2023-00261088, RS-2023-00256106, RS-2024-00466554, 2019R1A6A1A11044070