Characterization of Bimetallic Fe-Ru Oxide Nanoparticles Prepared by Liquid-Phase Plasma Method

Abstract

The bimetallic Fe-Ru oxide nanoparticles were synthesized in the liquid-phase plasma (LPP) method which employed iron chloride and ruthenium chloride as precursors. The active species (OH·, Hα, Hβ, and OI) and the iron and ruthenium ions were observed in the plasma field created by the LPP process. The spherical-shaped bimetallic Fe-Ru oxide nanoparticles were synthesized by the LPP reaction, and the size of the particles was growing along with the progression of the LPP reaction. The synthesized bimetallic Fe-Ru oxide nanoparticles were comprised of Fe2O3, Fe3O4, RuO, and RuO2. Ruthenium had a higher reduction potential than iron and resulted in higher ruthenium composition in the synthesized bimetallic nanoparticles. The control of the molar ratio of the precursors in the reactant solution was found to be employed as a means to control the composition of the elements in bimetallic nanoparticles.

Fe/Ru Oxide as a Versatile and Effective Cocatalyst for Boosting Z-Scheme Water-Splitting: Suppressing Undesirable Backward Electron Transfer

“…The unfavorable Fe 2+ oxidation is blocked by the coexisting FeO x component, leading to selective and efficient water oxidation (Figure , lower). In spite of some reports on bimetallic Fe and Ru oxides, − we have not yet clarified the exact form of the present (Fe,Ru)­O x (i.e., solid solution or not) as addressed above. At any event, what appears important is the close existence of the Fe and Ru species (confirmed in Figure S2) to realize such a “blocker” effect and rectification of electron transfer in the Z-scheme water-splitting with an Fe 3+ /Fe 2+ redox mediator.…”

Amorphous Ru-Pi Nanoclusters Coated on Polypyrrole Modified Carbon Fiber Paper for Non-Enzymatic Electrochemical Determination of Cholesterol

“…The most intense doublet peaks appear at 463.7 (Ru 3p 1/2 ) and 485.8 eV (Ru 3p 3/2 ) , which is characteristic of anhydrous Ru. 55 The core-level XPS spectrum of P 2p (Figure 8d) displays the presence of doublet, P 2p 1/2 and P 2p 3/2 at 134.1 eV and 133.2 eV respectively, which possibly suggests the presence of Pi weakly interacting with the Ru metal centers in the catalyst. 56 XPS core-level high resolution spectrum of K 2p (Figure 8e) displays the presence of doublet, K 2p 1/2 and K 2p 3/2 at 296.1 eV and 293.3 eV respectively.…”

Synthesis of Tween-Coated Silver Nanoparticles by a Plasma-Chemical Method: Catalytic and Antimicrobial

“…Atmospheric pressure plasma (APP) is new useful and simple preparation method of metal nanoparticles because this nonequilibrium plasma can provide rapid reactions due to the reactive chemical species [4]. Furthermore, in the case of APP method, high-energy radicals and a variety of reactive species are produced, thus resulting in direct synthesizing of various NPs, such as metals [3][4][5][6], alloys [7,8], oxides [9][10][11], and composites [12,13]. Among plasma-chemical discharges, contact non-equilibrium low-temperature plasma (CNP) is a promising option from practical application standpoint [14].…”