Stable and oxidative charged Ru enhance the acidic oxygen evolution reaction activity in two-dimensional ruthenium-iridium oxide

Abstract The oxygen evolution reactions in acid play an important role in multiple energy storage devices. The practical promising Ru-Ir based catalysts need both the stable high oxidation state of the Ru centers and the high stability of these Ru species. Here, we report stable and oxidative charged Ru in two-dimensional ruthenium-iridium oxide enhances the activity. The Ru 0.5 Ir 0.5 O 2 catalyst shows high activity in acid with a low overpotential of 151 mV at 10 mA cm −2 , a high turnover frequency of 6.84 s −1 at 1.44 V versus reversible hydrogen electrode and good stability (618.3 h operation). Ru 0.5 Ir 0.5 O 2 catalysts can form more Ru active sites with high oxidation states at lower applied voltages…

• SS
  Salt Science Research Foundation
• IR
  Innovative Research Group Project of the National Natural Science Foundation of China

  Awards: 51972216, 51821002
• NN
  National Natural Science Foundation of China

  Awards: 51972216, 51725204, 52271223, 52272043, 2020YFA0406101, 52202107, 52201269, 51821002
• GO
  Government of Jiangsu Province
• NS
  Natural Science Foundation of Jiangsu Province

  Awards: BK20220028, BK20210735
• HE
  Higher Education Discipline Innovation Project

  Award: 51821002