title: Core/Shell Face-Centered Tetragonal FePd/Pd Nanoparticles as an Efficient Non-Pt Catalyst for the Oxygen Reduction Reaction.
abstract: We report the synthesis of core/shell face-centered tetragonal (fct)-FePd/Pd nanoparticles (NPs) via reductive annealing of core/shell Pd/Fe3O4 NPs followed by temperature-controlled Fe etching in acetic acid. Among three different kinds of core/shell FePd/Pd NPs studied (FePd core at ∼8 nm and Pd shell at 0.27, 0.65, or 0.81 nm), the fct-FePd/Pd-0.65 NPs are the most efficient catalyst for the oxygen reduction reaction (ORR) in 0.1 M HClO4 with Pt-like activity and durability. This enhanced ORR catalysis arises from the desired Pd lattice compression in the 0.65 nm Pd shell induced by the fct-FePd core. Our study offers a general approach to enhance Pd catalysis in acid for ORR.
authors.affiliation: Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.|Department of Environmental Engineering, Zhejiang University , Hangzhou, Zhejiang 310058, China.
authors.forename: Guangming
authors.initials: G
authors.lastname: Jiang
authors.affiliation: Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
authors.forename: Huiyuan
authors.initials: H
authors.lastname: Zhu
authors.affiliation: Department of Physics and Astronomy, California State University Northridge , Northridge, California 91330, United States.
authors.forename: Xu
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
authors.forename: Bo
authors.initials: B
authors.lastname: Shen
authors.affiliation: Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
authors.forename: Liheng
authors.initials: L
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
authors.forename: Sen
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Physics and Astronomy, California State University Northridge , Northridge, California 91330, United States.
authors.forename: Gang
authors.initials: G
authors.lastname: Lu
authors.affiliation: Department of Environmental Engineering, Zhejiang University , Hangzhou, Zhejiang 310058, China.
authors.forename: Zhongbiao
authors.initials: Z
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
authors.forename: Shouheng
authors.initials: S
authors.lastname: Sun
keywords: FePd; core/shell nanoparticles; electrocatalysis; face-centered tetragonal structure; oxygen reduction reaction