title: Correlation between platinum nanoparticle surface rearrangement induced by heat treatment and activity for an oxygen reduction reaction.
abstract: Heat treatment of nanoparticles could induce the surface rearrangement for more stable facet exposure induced by thermodynamics. By changing the heat treatment environment, we confirmed the correlation between the oxygen reduction activity and the effect of surface oxide and the degree of surface rearrangement of Pt nanoparticles. Native surface oxide was not a critical factor for oxygen reduction activity. However, the degree of surface rearrangement could affect the activity, which was confirmed by the surface sensitive techniques such as CO(ad) oxidation and potential of zero total charge. Analysis indicated that the driving force for nanoparticle surface rearrangement was affected by the heat treatment environment such as gas, in our case.
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science, and School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Korea.
authors.forename: Dong Young
authors.initials: DY
authors.lastname: Chung
authors.forename: Young-Hoon
authors.initials: YH
authors.lastname: Chung
authors.forename: Namgee
authors.initials: N
authors.lastname: Jung
authors.forename: Kwang-Hyun
authors.initials: KH
authors.lastname: Choi
authors.forename: Yung-Eun
authors.initials: YE
authors.lastname: Sung
mesh_terms: D006358:Hot Temperature; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D010984:Platinum; D010100:Oxygen