title: A Generic Wet Impregnation Method for Preparing Substrate-Supported Platinum Group Metal and Alloy Nanoparticles with Controlled Particle Morphology.
abstract: Mass production of shape-controlled platinum group metal (PGM) and alloy nanoparticles is of high importance for their many fascinating properties in catalysis, electronics, and photonics. Despite of successful demonstrations at milligram scale using wet chemistry syntheses in many fundamental studies, there is still a big gap between the current methods and their real applications due to the complex synthetic procedures, scale-up difficulty, and surface contamination problem of the made particles. Here we report a generic wet impregnation method for facile, surfactant-free, and scalable preparation of nanoparticles of PGMs and their alloys on different substrate materials with controlled particle morphology and clean surface, which bridges the outstanding properties of these nanoparticles to practical important applications. The underlying particle growth and shape formation mechanisms were investigated using a combination of ex situ and in situ characterizations and were attributed to their different interactions with the applied gas molecules.
authors.affiliation: Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Changlin
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Shirin Norooz
authors.initials: SN
authors.lastname: Oliaee
authors.affiliation: Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Sang Youp
authors.initials: SY
authors.lastname: Hwang
authors.affiliation: Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Xiangkai
authors.initials: X
authors.lastname: Kong
authors.affiliation: Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Zhenmeng
authors.initials: Z
authors.lastname: Peng
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002384:Catalysis; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000497:Alloys; D010984:Platinum
keywords: Noble metal; alloy; nanostructure; scale up; shape control; wet impregnation method