title: Amine-assisted synthesis of concave polyhedral platinum nanocrystals having {411} high-index facets.
abstract: High-index surfaces of a face-centered cubic metal (e.g., Pd, Pt) have a high density of low-coordinated surface atoms and therefore possess enhanced catalysis activity in comparison with low-index faces. However, because of their high surface energy, the challenge of chemically preparing metal nanocrystals having high-index facets remains. We demonstrate in this work that introducing amines as the surface controller allows concave Pt nanocrystals having {411} high-index facets to be prepared through a facile wet-chemical route. The as-prepared Pt nanocrystals display a unique octapod morphology with {411} facets. The presence of high-index {411} exposed facets endows the concave Pt nanocrystals with excellent electrocatalytic activity in the oxidation of both formic acid and ethanol.
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Huang
authors.forename: Zipeng
authors.initials: Z
authors.lastname: Zhao
authors.forename: Jingmin
authors.initials: J
authors.lastname: Fan
authors.forename: Yueming
authors.initials: Y
authors.lastname: Tan
authors.forename: Nanfeng
authors.initials: N
authors.lastname: Zheng
mesh_terms: D000588:Amines / Q000737:chemistry*; D002384:Catalysis; D000431:Ethanol / Q000737:chemistry; D005561:Formates / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000588:Amines; D005561:Formates; C030544:formic acid; D000431:Ethanol; D010984:Platinum