Glycine-Mediated Syntheses of Pt Concave Nanocubes with High-Index {hk0} Facets and Their Enhanced Electrocatalytic Activities

摘要

Metal nanocrystals with high-index facetsn(HIFs) have drawn significant attention for their superiorncatalysis activity compared to that of low-index faces. However,nbecause of the high surface energy of HIFs, it is stillnchallenging to preserve HIFs during the growth of nanocrystals.nIn this study, highly selective Pt concave nanocubesn(CNCs) with high-index {hk0} facets have been successfullynprepared in a simple aqueous solution. The vital role of glycinenas the surface controller in the formation of CNCs wasndemonstrated. These Pt CNCs exhibited enhanced specificnactivities toward the electro-oxidation of methanol and formicnacid in comparison to commercial Pt black and Pt/C catalysts.