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Boita J, Nicolao L, Alves MC, et al. Observing Pt nanoparticle formation at the atomic level during polyol synthesis. Phys Chem Chem Phys. 2014;16(33):17640-7doi: 10.1039/c4cp01925c.
Boita, J., Nicolao, L., Alves, M. C., & Morais, J. (2014). Observing Pt nanoparticle formation at the atomic level during polyol synthesis. Physical chemistry chemical physics : PCCP, 16(33), 17640-7. https://doi.org/10.1039/c4cp01925c
Boita, Jocenir, et al. "Observing Pt nanoparticle formation at the atomic level during polyol synthesis." Physical chemistry chemical physics : PCCP vol. 16,33 (2014): 17640-7. doi: https://doi.org/10.1039/c4cp01925c
Boita J, Nicolao L, Alves MC, Morais J. Observing Pt nanoparticle formation at the atomic level during polyol synthesis. Phys Chem Chem Phys. 2014 Sep 07;16(33):17640-7. doi: 10.1039/c4cp01925c. PMID: 25027658.
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Phys Chem Chem Phys. 2014 Sep 07;16(33):17640-7. doi: 10.1039/c4cp01925c.

Observing Pt nanoparticle formation at the atomic level during polyol synthesis.

Physical chemistry chemical physics : PCCP

Jocenir Boita, Lucas Nicolao, Maria C M Alves, Jonder Morais

Affiliations

  1. Laboratório de Espectroscopia de Elétrons (LEe-), Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves, 9500, Bairro Agronomia, CP 15051, CEP 91501-970, Porto Alegre, RS, Brazil. [email protected].

PMID: 25027658 DOI: 10.1039/c4cp01925c

Abstract

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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