Polyol Synthesis of Platinum Nanostructures: Control of Morphology through the Manipulation of Reduction Kinetics

Chen, Jingyi; Herricks, Thurston; Xia, Younan

doi:10.1002/anie.200462668

Cited by 412 publications

(245 citation statements)

References 36 publications

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“…116 Sea-urchin-shaped Pt nanostructures were obtained by a polyol process in air at 110 1C, 90 with the help of a trace amount of Fe 2+ (or Fe 3+ ) in the solution to control the thermodynamics and kinetics of the reduction reaction. The other examples for such controlling synthesis are the formation of Pt nanotetrapods, 117 Pt nanowires ( Fig. 13(a)), 90 and nanoflowers ( Fig.…”

Section: Developments Of the Synthetic Methodsmentioning

confidence: 99%

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

et al. 2010

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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).

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Section: Developments Of the Synthetic Methodsmentioning

confidence: 99%

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

et al. 2010

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“…The results show that the amount of sodium diphenylamine-4-sulfonate and HAuCl 4 has no obvious effect on the morphology of gold nanocrystals. Based on the facts and previous reports of Pt nanorods, 33 Pt multipods, 34 Rh multipods, 35,36 and Au branched structures, 16,23,24 we think that the formation of branched gold nanocrystals may be associated with the competitive growth between (111) and (100) planes. 16,37 In our case, PEG molecules are adsorbed on the various crystal planes via specific interaction of O-Au between gold atoms and PEG molecules, while the oriented growth of the tip along [111] direction suggests very weak adsorption of PEG molecules on the {111} family of planes, which leads to the formation of the anisotropic branched gold nanocrystals.…”

Section: Effect Of Peg Haucl 4 and Sodium Diphenylamine-4-sulfonate mentioning

confidence: 58%

High‐yield Synthesis of Branched Gold Nanocrystals by a Sodium Diphenylamine‐4‐Sulfonate Reduction Process in Polyethylene Glycol Aqueous Solution

et al. 2010

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For developing new excellent electrocatalysts toward methanol and oxygen, branched Au nanocrystals have been prepared in high yield by the reaction of HAuCl 4 and sodium diphenylamine-4-sulfonate in the presence of PEG (polyethylene glycol) at room temperature. When the amount of PEG was in the range of 1-3 mL, branched Au nanocrystals were all obtained, and the amounts of sodium diphenylamine-4-sulfonate and HAuCl 4 had no obvious effect on the morphology of gold nanocrystals. PEG molecules play an important role in the formation of branched gold nanocrystals. The nanocrystals were characterized by transmission electron microscopy (TEM), selected area electron diffraction, high-resolution transmission electron microscopy (HRTEM) and UV-Vis absorption spectrum. HRTEM research suggests that the tips of gold nanocrystals grow selectively in the [111] directions. The UV-Vis absorption spectrum displays two-separated surface plasmon resonance peaks.

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“…An EG-mediated process is a versatile, convenient, and low-cost approach to prepare various nanostructures because of its unique merits, including a large-scale production, efficient formation of self-assembled nanostructures with different morphologies, and excellent size regulation [39][40][41][42][43]. This environment-friendly synthetic approach has been widely applied in fabrication of many functional nanostructures, such as 0D nanospheres or nanoparticles [44][45][46], 1D nanorods or nanowires [47][48][49][50], 2D nanoplates or nanofilms [51,52], and 3D nanoflowers [53,54].…”

Section: Preparation and Characterization Of Sinrsmentioning

confidence: 99%

Ethylene glycol-mediated synthetic route for production of luminescent silicon nanorod as photodynamic therapy agent

et al. 2017

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One-dimensional silicon nanorod (SiNR) has attracted considerable interest because of its unique morphology and electronic-optical properties that render SiNRs suitable for a broad spectrum of applications, such as fieldeffect transistor, drug carrier, solar cell, nanomechanical device, and lithium-ion battery. However, studies aiming to identify a new synthetic method and apply SiNR in the biomedical field remain limited. This study is the first to use an ethylene glycol-mediated synthetic route to prepare SiNR as a multicolor fluorescent probe and a new photodynamic therapy (PDT) agent. The as-prepared SiNR demonstrates bright fluorescence, excellent storage and photostability, favorable biocompatibility, excitation-dependent emission, and measurable quantity of 1 O 2 (0.24). On the basis of these features, we demonstrate through in vitro studies that the SiNR can be utilized as a new nanophotosensitizer for fluorescence imaging-guided cancer treatment. Our work leads to a new production process for SiNRs that can be used not only as PDT agents for therapy of shallow tissue cancer but also as excellent, environment-friendly, and red light-induced photocatalysts for the degradation of persistent organic pollutants in the future.

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Polyol Synthesis of Platinum Nanostructures: Control of Morphology through the Manipulation of Reduction Kinetics

Cited by 412 publications

References 36 publications

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

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

High‐yield Synthesis of Branched Gold Nanocrystals by a Sodium Diphenylamine‐4‐Sulfonate Reduction Process in Polyethylene Glycol Aqueous Solution

Ethylene glycol-mediated synthetic route for production of luminescent silicon nanorod as photodynamic therapy agent

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