Coverage Dependent Catalytic Activity of Pt on Au Nano-octahedra: From Single Atoms to Multiple Layers

Platinum was deposited on gold nanooctahedra with different coverage (0.05ML ~ 5ML). Formic acid oxidation was conducted to evaluate their catalytic activity. Catalytic activity of formic acid oxidation was greatly increased by two orders of magnitude with decreasing coverage. This high activity resulted from ensemble effect and Pt-Au bifunctional effect.