Synthesis of highly monodisperse Pd nanoparticles using a binary surfactant combination and sodium oleate as a reductant

Anna Pekkari; Xin Wen; Jessica Orrego-Hernández; Robson Rosa da Silva; Shun Kondo; Eva Olsson; Hanna Härelind; Kasper Moth-Poulsen

doi:10.1039/d1na00052g

Synthesis of highly monodisperse Pd nanoparticles using a binary surfactant combination and sodium oleate as a reductant

Nanoscale Adv. 2021 Mar 5;3(9):2481-2487. doi: 10.1039/d1na00052g. eCollection 2021 May 4.

Authors

Anna Pekkari¹, Xin Wen¹, Jessica Orrego-Hernández¹, Robson Rosa da Silva¹, Shun Kondo², Eva Olsson², Hanna Härelind¹, Kasper Moth-Poulsen¹

Affiliations

¹ Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden mkasper@chalmers.se.
² Nano and Biophysics, Department of Physics, Chalmers University of Technology 41296 Gothenburg Sweden.

Abstract

This study presents the synthesis of monodisperse Pd nanoparticles (NPs) stabilized by sodium oleate (NaOL) and hexadecyltrimethylammonium chloride (CTAC). The synthesis was conducted without traditional reductants and Pd-precursors are reduced by NaOL. It was confirmed that the alkyl double bond in NaOL is not the only explanation for the reduction of Pd-precursors since Pd NPs could be synthesized with CTAC and the saturated fatty acid sodium stearate (NaST). A quantitative evaluation of the reduction kinetics using UV-Vis spectroscopy shows that Pd NPs synthesized with both stabilizer combinations follow pseudo first-order reaction kinetics, where NaOL provides a faster and more effective reduction of Pd-precursors. The colloidal stabilization of the NP surface by CTAC and NaOL is confirmed by Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) analysis.