Triangular Ag-Pd alloy nanoprisms: Rational synthesis with high-efficiency for electrocatalytic oxygen reduction

Lin Xu; Zhimin Luo; Zhanxi Fan; Xiao Zhang; Chaoliang Tan; Hai Li; Hua Zhang; Can Xue

doi:10.1039/c4nr03600j

Triangular Ag-Pd alloy nanoprisms: Rational synthesis with high-efficiency for electrocatalytic oxygen reduction

Lin Xu, Zhimin Luo, Zhanxi Fan, Xiao Zhang, Chaoliang Tan, Hai Li, Hua Zhang, Can Xue^*

^*Corresponding author for this work

Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

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⁺/Pd²⁺ 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.

Original language	English
Pages (from-to)	11738-11743
Number of pages	6
Journal	Nanoscale
Volume	6
Issue number	20
DOIs	https://doi.org/10.1039/c4nr03600j
Publication status	Published - Oct 21 2014
Externally published	Yes

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© 2014 the Partner Organisations 2014.

ASJC Scopus Subject Areas

General Materials Science

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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+/Pd2+ 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.",

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AU - Xu, Lin

AU - Luo, Zhimin

AU - Fan, Zhanxi

AU - Zhang, Xiao

AU - Tan, Chaoliang

AU - Li, Hai

AU - Zhang, Hua

AU - Xue, Can

PY - 2014/10/21

Y1 - 2014/10/21

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AB - 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+/Pd2+ 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.

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Triangular Ag-Pd alloy nanoprisms: Rational synthesis with high-efficiency for electrocatalytic oxygen reduction

Abstract

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