Constructing regulable supports via non-stoichiometric engineering to stabilize ruthenium nanoparticles for enhanced pH-universal water splitting

Abstract Establishing appropriate metal-support interactions is imperative for acquiring efficient and corrosion-resistant catalysts for water splitting. Herein, the interaction mechanism between Ru nanoparticles and a series of titanium oxides, including TiO, Ti 4 O 7 and TiO 2, designed via facile non-stoichiometric engineering is systematically studied. Ti 4 O 7, with the unique band structure, high conductivity and chemical stability, endows with ingenious metal-support interaction through interfacial Ti–O–Ru units, which stabilizes Ru species during OER and triggers hydrogen spillover to accelerate HER kinetics. As expected, Ru/Ti 4 O 7 displays ultralow overpotentials of 8 mV and 150 mV for HER and OER…

• NN
  National Natural Science Foundation of China

  Award: 22075141
• GO
  Government of Jiangsu Province

  Award: BK20220039
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20210311
• NS
  National Synchrotron Radiation Research Center