Photothermal CO2 methanation over (NiO/Ru0)/TiO2 catalysts via hydrogen spillover

Photothermal CO2 methanation presents a promising strategy for mitigating the energy crisis and reducing CO2 emissions, however, the critical role of hydrogen migration dynamics in addressing reaction kinetics and thermodynamics has not been thoroughly investigated. Here, we demonstrate the design of a (NiO/Ru0)/TiO2 photothermal catalyst with optimized interfacial architecture and enhanced hydrogen mobility, which facilitates exceptionally selective conversion of CO2-to-CH4. Both experimental and theoretical analyses reveal that H2 dissociates efficiently on Ru0, subsequently undergoing spillover to O in NiO (ONiO). This process not only redistributes active sites but also influences the reaction kinetics,…

• NN
  National Natural Science Foundation of China

  Awards: 22361142838, 22038009, 22372116, 22250008, 2021YFA1500700, 22121004
• CP
  China Postdoctoral Science Foundation
• NK
  National Key Research and Development Program of China

  Awards: 22121004, 2021YFA1500704, 2021YFA1500700