Atomically Dispersed Platinum on Gold Nano-Octahedra with High Catalytic Activity on Formic Acid Oxidation

• DOI: 10.1021/cs300809j
• Publication Date: 2013-02-06T00:36:09Z
• Authors: Sungeun Yang; Hyunjoo Lee
• Keywords: 01 natural sciences; 0104 chemical sciences

Platinum was epitaxially deposited on gold octahedral nanocrystals using an electrochemical method. The coverage of platinum the surface finely controlled from fully covered multiple overlayers (5 monolayers; denoted as ML) to atomically dispersed submonolayer (0.05 ML). Catalytic activity for formic acid oxidation increased significantly (0.52 A/mgPt 5 ML 62.6 0.05 with decreasing coverage. This high resulted control reaction pathway toward direct producing no surface-poisoning species, induced by absence ensembles and bifunctional effect neighboring Pt–Au sites. distribution further confirmed methanol oxidation, which necessitates ensembles. result exemplifies that a rational design catalyst nanostructure can lead contrasting activities same catalyst, unprecedentedly vs oxidation.