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Solution-phase polyol synthesis and coadsorption MD calculations from faceted platinum nanoparticles: NOVEL NPs‒polymer morphology controlling

Ali Reza Akbarzadeh, Iraj Mesgarzadeh, and Rahime Eshaghi Malekshah

Department of Chemistry, Iran University of Science and Technology, Tehran, Iran

 

E-mail: a_akbarzadeh@iust.ac.ir

Received: 14 January 2022  Accepted: 9 May 2022

Abstract:

In this study, the polyol reduction process is applied to synthesize the platinum nanoparticles using polyethylene glycol (PEG) as a complexing/reducing agent and polyvinylpyrrolidone (PVP) as a stabilizer. The platinum nanoparticles were characterized by TEM, XRD, EDX, FT-IR, and UV–Vis spectroscopy indicating the formation of polydisperse faceted Pt nanoparticles. By binding PVP to (200) facets of platinum nanoparticles compared with (111) facets, it played a vital role in controlling the morphology of platinum nanocrystallines. Meanwhile, the (111) surfaces were used for reactions. Due to their nanocrystalline nature, the so-obtained platinum nanoparticles displayed different faceted shapes, including faceted and quasi-spherical morphologies. The molecular dynamics simulations were applied for coadsorption of PEG and PVP on PtCl4 (111), and K2PtCl6 (111) surfaces in Material Studio 2017 using the Forcite module. The results showed that coadsorption of PEG and PVP on PtCl4 (111) was higher than coadsorption of PEG and PVP on K2PtCl6 (111).

Graphical abstract

Keywords: Polyol synthesis; Colloidal platinum nanoparticles; Anisotropic morphologies; Faceted particles; Electron microscopy; Molecular dynamics simulations

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02272-3

 

Chemical Papers 76 (9) 5761–5774 (2022)

Monday, June 24, 2024

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