title: Ultrathin Free-Standing Ternary-Alloy Nanosheets.
abstract: A synthesis strategy for the preparation of ultrathin free-standing ternary-alloy nanosheets is reported. Ultrathin Pd-Pt-Ag nanosheets with a thickness of approximately 3 nm were successfully prepared by co-reduction of the metal precursors in an appropriate molar ratio in the presence of CO. Both the presence of CO and the interplay between the constituent metals provide fine control over the anisotropic two-dimensional growth of the ternary-alloy nanostructure. The prepared Pd-Pt-Ag nanosheets were superior catalysts of ethanol electrooxidation owing to their specific structural and compositional characteristics. This approach will pave the way for the design of multicomponent 2D nanomaterials with unprecedented functions.
authors.affiliation: Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, Korea.
authors.forename: Jong Wook
authors.initials: JW
authors.lastname: Hong
authors.affiliation: Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, Korea.
authors.forename: Yena
authors.initials: Y
authors.lastname: Kim
authors.affiliation: Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, Korea.
authors.forename: Dae Han
authors.initials: DH
authors.lastname: Wi
authors.affiliation: Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, Korea.
authors.forename: Seunghoon
authors.initials: S
authors.lastname: Lee
authors.affiliation: Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, Korea.
authors.forename: Su-Un
authors.initials: SU
authors.lastname: Lee
authors.affiliation: Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, Korea.
authors.forename: Young Wook
authors.initials: YW
authors.lastname: Lee
authors.affiliation: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu, 41566, Korea.
authors.forename: Sang-Il
authors.initials: SI
authors.lastname: Choi
authors.affiliation: Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, Korea. sangwoohan@kaist.ac.kr.
authors.forename: Sang Woo
authors.identifier: http://orcid.org/0000-0001-5406-5211
authors.initials: SW
authors.lastname: Han
keywords: alloys; nanosheets; palladium; platinum; silver