Turning the Halide Switch in the Synthesis of Au-Pd Alloy and Core-Shell Nanoicosahedra with Terraced Shells: Performance in Electrochemical and Plasmon-Enhanced Catalysis

Shih Cheng Hsu; Yu Chun Chuang; Brian T. Sneed; David A. Cullen; Te Wei Chiu; Chun Hong Kuo

doi:10.1021/acs.nanolett.6b02005

Turning the Halide Switch in the Synthesis of Au-Pd Alloy and Core-Shell Nanoicosahedra with Terraced Shells: Performance in Electrochemical and Plasmon-Enhanced Catalysis

Shih Cheng Hsu, Yu Chun Chuang, Brian T. Sneed, David A. Cullen, Te Wei Chiu, Chun Hong Kuo

Materials MicroAnalysis

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

68 Scopus citations

Abstract

Au-Pd nanocrystals are an intriguing system to study the integrated functions of localized surface plasmon resonance (LSPR) and heterogeneous catalysis. Gold is both durable and can harness incident light energy to enhance the catalytic activity of another metal, such as Pd, via the SPR effect in bimetallic nanocrystals. Despite the superior catalytic performance of icosahedral (IH) nanocrystals compared to alternate morphologies, the controlled synthesis of alloy and core-shell IH is still greatly challenged by the disparate reduction rates of metal precursors and lack of continuous epigrowth on multiply twinned boundaries of such surfaces. Herein, we demonstrate a one-step strategy for the controlled growth of monodisperse Au-Pd alloy and core-shell IH with terraced shells by turning an ionic switch between [Br^-]/[Cl^-] in the coreduction process. The core-shell IH nanocrystals contain AuPd alloy cores and ultrathin Pd shells (<2 nm). They not only display more than double the activity of the commercial Pd catalysts in ethanol electrooxidation attributed to monatomic step terraces but also show SPR-enhanced conversion of 4-nitrophenol. This strategy holds promise toward the development of alternate bimetallic IH nanocrystals for electrochemical and plasmon-enhanced catalysis.

Original language	English
Pages (from-to)	5514-5520
Number of pages	7
Journal	Nano Letters
Volume	16
Issue number	9
DOIs	https://doi.org/10.1021/acs.nanolett.6b02005
State	Published - Sep 14 2016

Funding

We are grateful for the technical support from NanoCore, the Core Facilities for Nanoscience and Nanotechnology at Academia Sinica in Taiwan. A portion of the electron microscopy was performed as part of a user project through Oak Ridge National Laboratorys Center for Nanophase Materials Sciences, which is a U.S. Department of Energy (DOE) Office of Science User Facility and using instrumentation provided by the U.S. DOE Office of Nuclear Energy, Fuel Cycle R&D Program, and the Nuclear Science User Facilities. We especially thank Ms. Mei-Ying Chung, the technician in the Institute of Chemistry at Academia Sinica in Taiwan, for carrying out SEM analyses and measurements of ICP-OES. This work is financially supported by the Ministry of Science and Technology, Taiwan (MOST 104-2113-M-001-007-MY2), and Academia Sinica, Taiwan (Program of Nanotechnology No. 2393).

Funders	Funder number
Core Facilities for Nanoscience and Nanotechnology at Academia Sinica in Taiwan
MOST 104-2113-M-001-007-MY2	104-2113-M-001-007-MY2
Oak Ridge National Laboratory
Office of Science User Facility
DOE Office of Nuclear Energy
U.S. Department of Energy
Academia Sinica	2393
Ministry of Science and Technology, Taiwan

Keywords

Gold
catalysis
icosahedral
nanocrystal
palladium

Access to Document

10.1021/acs.nanolett.6b02005

Cite this

@article{a80a4f38a6654317944936c4b1f87a79,

title = "Turning the Halide Switch in the Synthesis of Au-Pd Alloy and Core-Shell Nanoicosahedra with Terraced Shells: Performance in Electrochemical and Plasmon-Enhanced Catalysis",

abstract = "Au-Pd nanocrystals are an intriguing system to study the integrated functions of localized surface plasmon resonance (LSPR) and heterogeneous catalysis. Gold is both durable and can harness incident light energy to enhance the catalytic activity of another metal, such as Pd, via the SPR effect in bimetallic nanocrystals. Despite the superior catalytic performance of icosahedral (IH) nanocrystals compared to alternate morphologies, the controlled synthesis of alloy and core-shell IH is still greatly challenged by the disparate reduction rates of metal precursors and lack of continuous epigrowth on multiply twinned boundaries of such surfaces. Herein, we demonstrate a one-step strategy for the controlled growth of monodisperse Au-Pd alloy and core-shell IH with terraced shells by turning an ionic switch between [Br-]/[Cl-] in the coreduction process. The core-shell IH nanocrystals contain AuPd alloy cores and ultrathin Pd shells (<2 nm). They not only display more than double the activity of the commercial Pd catalysts in ethanol electrooxidation attributed to monatomic step terraces but also show SPR-enhanced conversion of 4-nitrophenol. This strategy holds promise toward the development of alternate bimetallic IH nanocrystals for electrochemical and plasmon-enhanced catalysis.",

keywords = "Gold, catalysis, icosahedral, nanocrystal, palladium",

author = "Hsu, {Shih Cheng} and Chuang, {Yu Chun} and Sneed, {Brian T.} and Cullen, {David A.} and Chiu, {Te Wei} and Kuo, {Chun Hong}",

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

year = "2016",

month = sep,

day = "14",

doi = "10.1021/acs.nanolett.6b02005",

language = "English",

volume = "16",

pages = "5514--5520",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "9",

}

TY - JOUR

T1 - Turning the Halide Switch in the Synthesis of Au-Pd Alloy and Core-Shell Nanoicosahedra with Terraced Shells

T2 - Performance in Electrochemical and Plasmon-Enhanced Catalysis

AU - Hsu, Shih Cheng

AU - Chuang, Yu Chun

AU - Sneed, Brian T.

AU - Cullen, David A.

AU - Chiu, Te Wei

AU - Kuo, Chun Hong

PY - 2016/9/14

Y1 - 2016/9/14

N2 - Au-Pd nanocrystals are an intriguing system to study the integrated functions of localized surface plasmon resonance (LSPR) and heterogeneous catalysis. Gold is both durable and can harness incident light energy to enhance the catalytic activity of another metal, such as Pd, via the SPR effect in bimetallic nanocrystals. Despite the superior catalytic performance of icosahedral (IH) nanocrystals compared to alternate morphologies, the controlled synthesis of alloy and core-shell IH is still greatly challenged by the disparate reduction rates of metal precursors and lack of continuous epigrowth on multiply twinned boundaries of such surfaces. Herein, we demonstrate a one-step strategy for the controlled growth of monodisperse Au-Pd alloy and core-shell IH with terraced shells by turning an ionic switch between [Br-]/[Cl-] in the coreduction process. The core-shell IH nanocrystals contain AuPd alloy cores and ultrathin Pd shells (<2 nm). They not only display more than double the activity of the commercial Pd catalysts in ethanol electrooxidation attributed to monatomic step terraces but also show SPR-enhanced conversion of 4-nitrophenol. This strategy holds promise toward the development of alternate bimetallic IH nanocrystals for electrochemical and plasmon-enhanced catalysis.

AB - Au-Pd nanocrystals are an intriguing system to study the integrated functions of localized surface plasmon resonance (LSPR) and heterogeneous catalysis. Gold is both durable and can harness incident light energy to enhance the catalytic activity of another metal, such as Pd, via the SPR effect in bimetallic nanocrystals. Despite the superior catalytic performance of icosahedral (IH) nanocrystals compared to alternate morphologies, the controlled synthesis of alloy and core-shell IH is still greatly challenged by the disparate reduction rates of metal precursors and lack of continuous epigrowth on multiply twinned boundaries of such surfaces. Herein, we demonstrate a one-step strategy for the controlled growth of monodisperse Au-Pd alloy and core-shell IH with terraced shells by turning an ionic switch between [Br-]/[Cl-] in the coreduction process. The core-shell IH nanocrystals contain AuPd alloy cores and ultrathin Pd shells (<2 nm). They not only display more than double the activity of the commercial Pd catalysts in ethanol electrooxidation attributed to monatomic step terraces but also show SPR-enhanced conversion of 4-nitrophenol. This strategy holds promise toward the development of alternate bimetallic IH nanocrystals for electrochemical and plasmon-enhanced catalysis.

KW - Gold

KW - catalysis

KW - icosahedral

KW - nanocrystal

KW - palladium

UR - http://www.scopus.com/inward/record.url?scp=84987722788&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.6b02005

DO - 10.1021/acs.nanolett.6b02005

M3 - Article

AN - SCOPUS:84987722788

SN - 1530-6984

VL - 16

SP - 5514

EP - 5520

JO - Nano Letters

JF - Nano Letters

IS - 9

ER -

Turning the Halide Switch in the Synthesis of Au-Pd Alloy and Core-Shell Nanoicosahedra with Terraced Shells: Performance in Electrochemical and Plasmon-Enhanced Catalysis

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this