fig2

Figure 2. (A) Transmission electron microscopy images of Pt/SrTiO₃ after five ALD cycles and propane oxidation light-off curves over two temperature cycles (25-400 °C) for 1c, 3c, and 5c Pt/SrTiO₃, 4.7%Pt/γ-Al₂O₃, and platinum-free STO nanocuboids, with C₃H₈/O₂ = 1:16 and C₃H₈ WHSV = 4 h^-1. Reproduced with permission from Ref.^[66]; (B) Relationship between TOFs at 220 °C and Pt/Ptⁿ⁺ ratios for various catalysts. Reproduced with permission from Ref.^[70]; (C) Evolution of the chemical state of Pt species on a Pt/BN catalyst during propane oxidation. Reproduced with permission from Ref.^[70]. ALD: atomic layer deposition; STO: SrTiO₃; WHSV: weight hourly space velocity; TOFs: turnover frequencies; BN: boron nitride.