Morphology and chemical state of PVP-protected Pt, Pt–Cu, and Pt–Ag nanoparticles prepared by alkaline polyol method

Papa, Florica; Negrilǎ, C.; Miyazaki, Akane; Balint, Ioan

doi:10.1007/s11051-011-0486-9

Cited by 27 publications

(19 citation statements)

References 22 publications

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“…1,2 Therefore, several authors have suggested that silver and platinum in one nanoparticle can form only core-shell structures because alloying is impossible with the bulk metals (miscibility gap). [3][4][5] Depending on the reaction conditions, the core of a bimetallic nanoparticle can consist either of silver or of platinum. Other authors have successfully prepared alloyed silver-platinum nanoparticles for a potential application in heterogeneous catalysis.…”

Section: Introductionmentioning

confidence: 99%

“…The pH of the reaction mixture oen plays a crucial role for the nanoparticle size. 5,12,18 Platinum nanoparticles show several enzyme-like actions in vitro 19,20 and in vivo, affecting the homeostasis of cellular reactive oxygen species. 21,22 However, the reported biological effects of platinum nanoparticles towards microorganisms, animals and human cells are difficult to compare due to the wide variety of biological systems, analytical methods and types of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and biological characterization of alloyed silver–platinum nanoparticles: from compact core–shell nanoparticles to hollow nanoalloys

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and biological characterization of alloyed silver–platinum nanoparticles: from compact core–shell nanoparticles to hollow nanoalloys

et al. 2018

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“…[1][2][3] This is advantageous in a wide range of applications in optics, electronics, magnetism and catalysis. 1,4,5 In all potential applications, it is desirable to have precise control of NP size and shape during particle synthesis.…”

Section: Introductionmentioning

confidence: 99%

Observing Pt nanoparticle formation at the atomic level during polyol synthesis

Boita

Nicolao

Alves

et al. 2014

Phys. Chem. Chem. Phys.

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This study investigated the synthesis of platinum nanoparticles (Pt NPs) in ethylene glycol using low cost and low toxicity chemicals as reducing (ascorbic acid) and stabilizing agents (polyvinylpyrrolidone and sodium citrate). By monitoring the changes in the local chemical environment of the Pt atoms in real time by in situ dispersive X-ray absorption spectroscopy, it is observed that the NP formation kinetics involved three different stages within 3 h 30 min of the reaction: a reduction-nucleation burst, followed by diffusion-limited Ostwald ripening growth and subsequent stabilization of the NPs. The resulting Pt NPs were analyzed by transmission electron microscopy and X-ray diffraction, revealing a monodisperse average size distribution of 2.7 ± 0.5 nm, characterized by highly crystalline and stable Pt clusters, showing no significant aging for at least nine months.

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“…θ is Bragg's angle. The average crystal size was calculated to be 2.76 nm for the PtCu3 structure [33]. This XRD analysis showed that PtCu3 NPs successfully synthesized with small crystal size and free from the possible by-products such as impurities and oxidations.…”

Section: Resultsmentioning

confidence: 82%

Structural analysis of pure PtCu3 nanoparticles synthesized by modified Polyol process

Kaya

2021

Cumhuriyet Science Journal

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The development of effective multi-functional Pt-based nanoparticles (NPs) with enhanced activity, stability, and reduced cost for advanced applications still remains a challenge. In this study, Pt(acac)2 and Cu(OAc)2 metal precursors were reduced to form Pt-Cu NPs at 140 °C in ethylene glycol and sodium borohydride that is a secondary reducing agent in the modified polyol method. The x-ray diffraction (XRD) and Rietveld refinement analyses confirmed the face-centered cubic PtCu3 structure with the space groups of Fm3 � m and a lattice constant of a=b=c=3.6829 Å. The average crystal size was found to be 2.76 nm by Scherrer's formula. Scanning electron microscopy (SEM) images confirm the formation of monodisperse PtCu3 NPs with an average size of 8.04 nm within a narrow range of 5-13 nm. While energydispersive x-ray spectroscopy (EDS) analysis confirmed that the composition is formed of 26% Pt and 74% Cu atoms and XRD and EDS analyses were confirmed impurity, by-products, and oxidation free NPs formation.

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Morphology and chemical state of PVP-protected Pt, Pt–Cu, and Pt–Ag nanoparticles prepared by alkaline polyol method

Cited by 27 publications

References 22 publications

Synthesis and biological characterization of alloyed silver–platinum nanoparticles: from compact core–shell nanoparticles to hollow nanoalloys

Synthesis and biological characterization of alloyed silver–platinum nanoparticles: from compact core–shell nanoparticles to hollow nanoalloys

Observing Pt nanoparticle formation at the atomic level during polyol synthesis

Structural analysis of pure PtCu3 nanoparticles synthesized by modified Polyol process

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