Effectiveness of strain and dopants on breaking the activity-stability trade-off of RuO2 acidic oxygen evolution electrocatalysts

Ruthenium dioxide electrocatalysts for acidic oxygen evolution reaction suffer from mediocre activity and rather instability induced by high ruthenium-oxygen covalency. Here, the tensile strained strontium and tantalum codoped ruthenium dioxide nanocatalysts are synthesized via a molten salt-assisted quenching strategy. The tensile strained spacially elongates the ruthenium-oxygen bond and reduces covalency, thereby inhibiting the lattice oxygen participation and structural decomposition. The synergistic electronic modulations among strontium-tantalum-ruthenium groups both optimize deprotonation on oxygen sites and intermediates absorption on ruthenium sites, lowering the reaction energy barrier. Those result…

• SU
  Shandong University
• TS
  Taishan Scholar Foundation of Shandong Province

  Award: tsqn202408012
• NR
  National Research Foundation

  Awards: BK21 FOUR, NRF-2022R1A2C2093415
• SU
  Sungkyunkwan University

  Award: BK21 FOUR
• GO
  Government of Jiangsu Province
• KB
  Korea Basic Science Institute

  Award: 2022R1A6C101A751
• NR
  National Research Foundation of Korea

  Awards: NRF-2022R1A2C2093415, 2022R1A6C101A751, 2022R1A2C2093415
• MO
  Ministry of Education, India
• NS
  Natural Science Foundation of Jiangsu Province
• NS
  Natural Science Foundation of Shandong Province

  Award: 2024HWYQ-031