Highly Stable Pt/CeO 2 Catalyst with Embedding Structure toward Water–Gas Shift Reaction

Strong metal–support interaction (SMSI) has been extensively studied in heterogeneous catalysis because of its significance in stabilizing active metals and tuning catalytic performance, but the origin of SMSI is not fully revealed. Herein, by using Pt/CeO2 as a model catalyst, we report an embedding structure at the interface between Pt and (110) plane of CeO2, where Pt clusters (∼1.6 nm) are embedded into the lattice of ceria within 3–4 atomic layers. In contrast, this phenomenon is absent in the CeO2(100) support. This unique geometric structure, as an effective motivator, triggers more significant electron transfer from Pt clusters to CeO2(110) support accompanied by the formation of interfacial structure…

• NN
  National Natural Science Foundation of China

  Awards: 22172006, U19B6002, 22102006, 22288102
• BM
  Beijing Municipal Natural Science Foundation

  Award: 2212012
• NK
  National Key Research and Development Program of China

  Award: 2021YFC2103500