Catalytic Properties of Platinum Nanoparticles Obtained in a Single Step Simultaneous Reduction of Pt(IV) Ions and Graphene Oxide

Abstract

A composite material consisting of metallic platinum nanoparticles and reduced graphene oxide was successfully obtained in microflow reactor. Moreover, subnanometric platinum particles were observed. Reduced graphene oxide plays an important role as a stabilizing agent for platinum nanoparticles. Reduced graphene oxide coverage and platinum particle size as well as size distribution depend mainly on initial concentration of platinum(IV) ions. High level of reduced graphene oxide coverage by platinum nanoparticles (PtNPs) was obtained and is equal to 71%. This in turn effects significantly the mass ratio of reduced graphene oxide to PtNPs which is equal to 49% (w/w). Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) analysis of the obtained materials were performed. Also, catalytic properties of the obtained composite material consisting of PtNPs at reduced graphene oxide surface, towards electrochemical glucose oxidation, were investigated. It was found that the studied materials exhibit high catalytic activity for glucose electro-oxidation process.

Electrochemical Deposition of Ruthenium and Cobalt-Ruthenium Alloys From Acidic Chloride Ions Containing Baths

“…Catalytic properties of materials are analysed in a nanoscale, e.g. nanoparticles of precious metals in processes of electro-oxidation of glucose, designated for fuel cells [12][13] For example the Tropsch-Fischer synthesis uses cobalt oxides and irons deposited on alumina matrix of highly developed surface as the catalytically active material [14][15][16][17]. Cobalt catalysers of the latest generation feature in their composition a slight addition of ruthenium [18] introduced in the form of nanoparticles, which allows a local increase of gaseous CO concentration as a result of its strong adsorption on its surface.…”

Influence of Experimental Conditions on Deposition of Silver Nanoparticles Onto Surface of Graphene Oxide / Wpływ Warunków Eksperymentalnych Na Proces Osadzania Nanocząstek Srebra Na Powierzchni Tlenku Grafenu

“…The catalytic test procedure was described in previous papers [6,27]. However obtained AgNPs@GO material does not exhibit catalytic activity in the process of glucose electrooxidation in opposite to silver wire.…”

“…It is expected that this type of materials will exhibit high durability, thermodynamic stability and often high catalytic activity. Therefore, a lot of attention has been paid to synthesis of composite materials using different method among of them electrochemical [3][4][5] and chemical ones [6,7]. It is known, that the graphene is one of the most promising material due to its high electrical [8] and thermal conductivity [8] as well as chemical resistance [9].…”

Continuous, monodisperse silver nanoparticles synthesis using microdroplets as a reactor

“…In the last decade, the synthesis of nanomaterials has made a large step forward, due to their potential application in many areas such as catalysis [1,2], medicine [3,4], optics [5], tissue [6], etc. Nanomaterials have due to their high surface to volume ratio [7] unique properties different from bulk materials such as optical [8,9] and electronically [10] properties. Two methods are at hand for the synthesis of nanomaterials, i.e.…”

“…Microfluidic systems allow a particularly good process control. This is most evident from their ability to tune nanoparticle size, and narrow the nanoparticles size distribution [9,10,[15][16][17][18][19][20][21][22]. The high volumespecific ratio of channel surface area to volume enables ultrafast mixing and fast heat exchange which are of utmost relevance to the seed formation and particle growth.…”