title: Triangular Ag-Pd alloy nanoprisms: rational synthesis with high-efficiency for electrocatalytic oxygen reduction.
abstract: We report the generation of triangular Ag-Pd alloy nanoprisms through a rationally designed synthetic strategy based on silver nanoprisms as sacrificial templates. The galvanic replacement between Ag nanoprisms and H2PdCl4 along with co-reduction of Ag(+)/Pd(2+) is responsible for the formation of final prismatic Ag-Pd alloy nanostructures. Significantly, these Ag-Pd alloy nanoprisms exhibited superior electrocatalytic activity for the oxygen reduction reaction (ORR) as compared with the commercial Pd/C catalyst. Such a high catalytic activity is attributed to not only the alloyed Ag-Pd composition but also the dominant {111} facets of the triangular Ag-Pd nanoprisms. This work demonstrates the rational design of bimetallic alloy nanostructures with control of selective crystal facets that are critical to achieve high catalytic activity for fuel cell systems.
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore. cxue@ntu.edu.sg.
authors.forename: Lin
authors.initials: L
authors.lastname: Xu
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Luo
authors.forename: Zhanxi
authors.initials: Z
authors.lastname: Fan
authors.forename: Xiao
authors.initials: X
authors.lastname: Zhang
authors.forename: Chaoliang
authors.initials: C
authors.lastname: Tan
authors.forename: Hai
authors.initials: H
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.forename: Can
authors.initials: C
authors.lastname: Xue