Synthesis of Platinum Nanoparticles from K2PtCl4 Solution Using Bacterial Cellulose Matrix

H F Aritonang,C Ciptati,D Onggo,C L Radiman

doi:10.1155/2014/285954

Abstract

Platinum (Pt) nanoparticles have been synthesized from a precursor solution of potassium tetrachloroplatinate (K2PtCl4) using a matrix of bacterial cellulose (BC). The formation of Pt nanoparticles occurs at the surface and the inside of the BC membrane by reducing the precursor solution with a hydrogen gas reductant. The Pt nanoparticles obtained from the variations of precursor concentration, between 3 mM and 30 mM, and the formation of Pt nanoparticles have been studied using X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), and thermogravimetry analysis (TGA). Based on X-ray diffraction patterns, Pt particles have sizes between 6.3 nm and 9.3 nm, and the Pt particle size increases with an increase in precursor concentration. The morphology of the Pt nanoparticles was observed by SEM-EDS and the content of Pt particles inside the membrane is higher than that on the surface of BC membranes. This analysis corresponds to the TGA analysis, but the TGA analysis is more representative in how it describes the content of Pt particles in the BC membrane.

Highlights

Platinum (Pt) has attracted much attention because Pt is the best catalyst to use for a variety of specific purposes
Pt nanoparticles have been successfully synthesized from aqueous K2PtCl4 solution inside the bacterial cellulose (BC) membrane using hydrogen gas as a reducing agent
Pt nanoparticles have been synthesized from the K2PtCl4 solution using H2 as a reducing agent

Summary

Introduction

Platinum (Pt) has attracted much attention because Pt is the best catalyst to use for a variety of specific purposes. No one method is superior to the other methods because it depends on the final application of the catalyst used Among these methods, the synthesis of Pt nanoparticles using the reduction method is a very simple method. Yang et al [17] have synthesized Pt nanoparticles from Pt (IV) solution, namely, H2PtCl6, into BC matrix using sodium borohydride and a formaldehyde reductant. They reported that the Pt particle sizes of 3-4 nm are generated and applied as catalysts for fuel cells. By using a precursor source and reducing agent that differs from previous research, this research is expected to provide new information on the synthesis development of Pt nanoparticles, for use in fuel cells

Materials and Methods

Results and Discussion

Conclusions