Kinetically Controlled Synthesis of Triangular and Hexagonal Nanoplates of Palladium and Their SPR/SERS Properties

Xiong, Yujie; McLellan, Joseph M.; Chen, Jingyi; Yin, Yadong; Li, Zhiyuan; Xia, Younan

doi:10.1021/ja056498s

Cited by 654 publications

(557 citation statements)

References 59 publications

Supporting

Mentioning

513

Contrasting

Unclassified

Order By: Relevance

“…The FFT patterns observed in Figs.5(c) and (d) agree with that in Fig.5(b), which means that a single crystalline dendrite was produced. The result agrees with that of the leaf part structure, which is observable only for a sample that is atomically smooth and very thin two dimensional flat sheets [7,15,29,30].…”

Section: Spectral Characterizations Of Ag Nanostructuressupporting

confidence: 86%

Growth of Ag Nanostructures on Various Metallic Substrates

Meng

Nakane

Matsushita

et al. 2013

Trans. Mat. Res. Soc. Japan

View full text Add to dashboard Cite

Various kinds of Ag nanostructures were grown on various metallic substrates using hexakisphosphate (IP6) as a silver carrier agent. The Ag nanostructures with three-dimensional dendritic structure, the two-dimensional dendritic structure, the two-dimensional fractal structure, particles and nanowire structures were controllably obtained. The morphological control by IP6 using additional metallic materials is proposed. The structural properties of the Ag nanostructures were examined, and the growth evolution of the nanostructures was discussed. It is considered that the IP6 plays an important role as a silver carrier agent for the structural and morphological control of the Ag nanostructures.

show abstract

Section: Spectral Characterizations Of Ag Nanostructuressupporting

confidence: 86%

Growth of Ag Nanostructures on Various Metallic Substrates

Meng

Nakane

Matsushita

et al. 2013

Trans. Mat. Res. Soc. Japan

View full text Add to dashboard Cite

show abstract

“…It was reported that the twinned Pd particles could be selectively removed and produced uniform, single-crystal cubooctahedra Pd nanoparticles by controlling the Cl − /O 2 etching process. 52 In the present process, the Cl The experiments presented above have shown that the addition of certain amount of iodine ions into the polyol process to realize the kinetic control of the reaction rate is the prerequisite for the formation of Pt nanoflowers.…”

Section: Resultsmentioning

confidence: 84%

Iodine Ions Mediated Formation of Monomorphic Single-Crystalline Platinum Nanoflowers

Yin

Wang

et al. 2012

Chem. Mater.

View full text Add to dashboard Cite

Well-defined and strikingly monomorphic single-crystalline Pt nanoflowers were successfully synthesized through the addition of a large amount of iodine ions into polyol process (5 mM H 2 PtCl 6 , 30 mM KI, and 50 mM PVP in ethylene glycol solution at 160°C). The detailed structures of the Pt nanoflowers were studied with high-resolution TEM, indicating that high-quality production of the Pt nanoflowers could be obtained when the KI concentration was increased to six times of H 2 PtCl 6 . The size of Pt nanoflowers could be tuned by changing the concentration of H 2 PtCl 6 with the constant Pt/I ratio (1:6). The formation process of the nanoflowers was investigated by the UV−vis and EXAFS spectroscopic studies, demonstrating that the iodine ions played a key role in inducing the formation of the single-crystalline Pt nanoflowers. After the addition of iodine ions into the polyol synthesis, the Pt−I complex was formed and reduced by different kinetics compared with that of H 2 PtCl 6 to induce the overgrowth of Pt nanocrystals. Additionally, a small portion of iodine element was found to be strongly adsorbed on the surfaces of Pt nanoflowers, which probably also favored the anisotropic overgrowth of Pt nanocrystals resulting in the single-crystalline Pt nanoflowers. A comprehensive set of systematic studies on the synthesis factors (the concentrations of Pt precursor, iodine ions and PVP, reaction temperature, different kinds of Pt precursors and reaction atmosphere) was also reported.

show abstract

“…Ethylene glycol has been identified as unique in serving as both the solvent and the primary reductant for Pt nanocrystal synthesis. 16,111,112 It has also been recognized that the kinetics of crystal growth can be controlled by reducing agents. For example, a strong reducing agent may assist in the formation of thermodynamically favoured polyhedral nanocrystals.…”

Section: Developments Of the Synthetic Methodsmentioning

confidence: 99%

Nanostructured Pt-alloy electrocatalysts for PEM fuel cell oxygen reduction reaction

et al. 2010

View full text Add to dashboard Cite

In this critical review, we present the current technological advances in proton exchange membrane (PEM) fuel cell catalysis, with a focus on strategies for developing nanostructured Pt-alloys as electrocatalysts for the oxygen reduction reaction (ORR). The achievements are reviewed and the major challenges, including high cost, insufficient activity and low stability, are addressed and discussed. The nanostructured Pt-alloy catalysts can be grouped into different clusters: (i) Pt-alloy nanoparticles, (ii) Pt-alloy nanotextures such as Pt-skins/monolayers on top of base metals, and (iii) branched or anisotropic elongated Pt or Pt-alloy nanostructures. Although some Pt-alloy catalysts with advanced nanostructures have shown remarkable activity levels, the dissolution of metals, including Pt and alloyed base metals, in a fuel cell operating environment could cause catalyst degradation, and still remains an issue. Another concern may be low retention of the nanostructure of the active catalyst during fuel cell operation. To facilitate further efforts in new catalyst development, several research directions are also proposed in this paper (130 references).

show abstract

Kinetically Controlled Synthesis of Triangular and Hexagonal Nanoplates of Palladium and Their SPR/SERS Properties

Cited by 654 publications

References 59 publications

Growth of Ag Nanostructures on Various Metallic Substrates

Growth of Ag Nanostructures on Various Metallic Substrates

Iodine Ions Mediated Formation of Monomorphic Single-Crystalline Platinum Nanoflowers

Nanostructured Pt-alloy electrocatalysts for PEM fuel cell oxygen reduction reaction

Contact Info

Product

Resources

About