Fig. 4: Catalytic performance.

a The light-off curves for CO oxidation performances of PtnOx/CeO2, PtLC/CeO2, PtLC/CeO2-a, and PtHC/CeO2. b Reaction rates of catalysts as a function of reaction temperature. PtLC/CeO2 (orange line and circles), PtLC/CeO2-a (grey line and circles) and PtHC/CeO2 (green line and triangles). CO oxidation durability tests for PtLC/CeO2 at (c) 200 °C and (d) 230 °C.