Au@Pd nanostructures with tunable morphologies and sizes and their enhanced electrocatalytic activity

Kim, Do Youb; Kang, Shin Wook; Choi, Kyeong Woo; Choi, Sun Woong; Han, Sang Woo; Im, Sang Hyuk; Park, O Ok

doi:10.1039/c3ce40986d

Cited by 30 publications

(12 citation statements)

References 57 publications

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“…Note that, when the concentration of CPC was increased to 42 m m , polyhedral Pd nanostructures with smaller diameters (10 nm) were obtained (Figure D). From these experimental results, we can conclude that the optimal concentration range of CPC for synthesizing porous Pd NPAs is from 0.8 m m to about 21 m m , which is consistent with previous reports …”

Section: Resultssupporting

confidence: 92%

Pd Nanoparticle Assemblies as Efficient Catalysts for the Hydrogen Evolution and Oxygen Reduction Reactions

Liu

Duan

et al. 2017

Eur J Inorg Chem

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Developing bifunctional catalysts for both the hydrogen evolution reaction (HER) and the oxygen reduction reaction (ORR) is crucial for obtaining hydrogen easily by water splitting to promote electrochemical energy conversion in fuel cells. In this paper, we report a facile approach for the synthesis of Pd nanoparticle assemblies (NPAs) with porous structure as catalysts for both the HER and the ORR with desirable electrocatalytic activities and long-term stability. For the HER, the porous Pd NPAs exhibit a low onset potential, a small Tafel slope of 30 mV dec -1 , and an exceptionally low overpotential of about [a]

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Section: Resultssupporting

confidence: 92%

Pd Nanoparticle Assemblies as Efficient Catalysts for the Hydrogen Evolution and Oxygen Reduction Reactions

Liu

Duan

et al. 2017

Eur J Inorg Chem

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“…The high activity originated from the synergistic effect existing between the three different nanostructure components (sphere, shell and islands). Ksar et al [38][39][40] synthesized bimetallic Pd-Au nanostructures with a core rich in gold and a Pd porous shell. This structure greatly reduced the loading of Pd.…”

Section: Hollow or Core-shell Structuresmentioning

confidence: 99%

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

2015

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This review selectively summarizes the latest developments in the Pd-based cataysts for low temperature proton exchange membrane fuel cells, especially in the application of formic acid oxidation, alcohol oxidation and oxygen reduction reaction. The advantages and shortcomings of the Pd-based catalysts for electrocatalysis are analyzed. The influence of the structure and morphology of the Pd materials on the performance of the Pd-based catalysts were described. Finally, the perspectives of future trends on Pd-based catalysts for different applications were considered.

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“…[5][6][7][8][9][10][11] Seed-mediated nanocrystal growth provides a robust and versatile approach to the deposition of Pd onto Au nanoparticles to form hybrid bimetallic heteronanostructures with fine-controlled sizes, shapes, compositions, and surfaces. [12][13][14][15][16][17][18][19][20][21][22] Through manipulation of the kinetic and thermodynamic parameters governing the nanocrystal growth, architecturally controlled Pd can be deposited either conformally or in a site-selective manner on the surface of the Au seeds, [12][13][14][15][16][17][18][19][20][21][22] allowing one to delineate how the particle geometries, the interfacial structures, and the spatial arrangements of the constituent domains influence the synergistic properties of the bimetallic heteronanostructures.…”

Section: Introductionmentioning

confidence: 99%

Controlled overgrowth of Pd on Au nanorods

Jing

Wang

2014

CrystEngComm

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In this paper, we present a detailed, systematic study of the controlled overgrowth of Pd on Au nanorods.Pd nanoshells with fine-controlled dimensions and architectures were overgrown on single-crystalline Au nanorods through seed-mediated growth using H 2 PdCl 4 as the Pd precursor and ascorbic acid as the reducing agent in the presence of cetyltrimethylammonium chloride (CTAC) or cetyltrimethylammonium bromide (CTAB) as the surface capping agent. The effects of surface capping agent, ascorbic acid to H 2 PdCl 4 ratio, reaction temperature, and structure-directing foreign ions, such as Ag + , on the dimensions and architectures of the resulting Au@Pd core-shell heteronanostructures were systematically studied.At 30 °C, Au nanorods coated with polycrystalline Pd shells were obtained using CTAC as the surface capping agent, while single-crystalline Au@Pd core-shell nanocuboids formed in the presence of CTAB.The thicknesses of the polycrystalline and single-crystalline Pd shells were fine-controlled by adjusting the molar ratio of ascorbic acid to H 2 PdCl 4 . At an elevated reaction temperature of 60 °C, irregularly shaped and cylindrical co-axial core-shell nanorods were obtained in CTAC and CTAB, respectively. By introducing Ag + ions into the Pd growth solution, Au nanorods coated with segregated Pd nanoislands and dumbbell-like core-shell heteronanostructures were obtained as a consequence of the underpotential deposition of Ag and sustainable galvanic replacements that concurred during the Pd overgrowth processes.The effects of the Pd shell dimensions and morphologies on the plasmonic properties of the Au@Pd core-shell nanostructures were also investigated.

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Au@Pd nanostructures with tunable morphologies and sizes and their enhanced electrocatalytic activity

Cited by 30 publications

References 57 publications

Pd Nanoparticle Assemblies as Efficient Catalysts for the Hydrogen Evolution and Oxygen Reduction Reactions

Pd Nanoparticle Assemblies as Efficient Catalysts for the Hydrogen Evolution and Oxygen Reduction Reactions

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

Controlled overgrowth of Pd on Au nanorods

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