Composition and structure of NiAu nanoparticles formed by laser ablation of Ni target in Au colloidal solution

Petrović, Suzana; Milovanović, Dubravka; Salatić, Branislav; Peruško, D.; Kovač, Janez; Dražić, Goran; Mitrić, Miodrag; Trtica, M.; Jelenković, Branislav

doi:10.1016/j.matchemphys.2015.10.007

Cited by 8 publications

(2 citation statements)

References 38 publications

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“…Figure 8 displays the mutual overlap of three EDX elemental maps, Ni, Au and W. From the EDX image, it was indicated that Au and Ni elements were intermixed, showing gold NPs predominant with a good dispersion on the Ni surface near the support lattice. It can be concluded that the nickel NPs are incorporated in the gold matrix due to the metallic interaction between nickel and gold [ 46 , 47 , 48 ]. Metal–support interactions in the supported catalysts have been detected when the incorporation of metals into the framework of a support lattice occurs [ 49 , 50 ].…”

Section: Resultsmentioning

confidence: 99%

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

et al. 2021

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NiWAu trimetallic nanoparticles (NPs) on the surface of support Al2O3-CeO2-TiO2 were synthesized by a three-step synthetic method in which Au NPs were incorporated into presynthesized NiW/Al2O3-CeO2-TiO2. The recharge method, also known as the redox method, was used to add 2.5 wt% gold. The Al2O3-CeO2-TiO2 support was made by a sol–gel method with two different compositions, and then two metals were simultaneously loaded (5 wt% nickel and 2.5 wt% tungsten) by two different methods, incipient wet impregnation and ultrasound impregnation method. In this paper, we study the effect of Au addition using the recharge method on NiW nanomaterials supported on mixed oxides on the physicochemical properties of synthesized nanomaterials. The prepared nanomaterials were characterized by scanning electron microscopy, BET specific surface area, X-ray diffraction, diffuse reflectance spectroscopy in the UV–visible range and temperature-programmed desorption of hydrogen. The experimental results showed that after loading of gold, the dispersion was higher (46% and 50%) with the trimetallic nanomaterials synthesized by incipient wet impregnation plus recharge method than with impregnation plus ultrasound recharge method, indicating a greater number of active trimetallic (NiWAu) sites in these materials. Small-sized Au from NiWAu/ACTU1 trimetallic nanostructures was enlarged for NiWAu/ACT1. The strong metal NPs–support interaction shown for the formation of NiAl2O4, Ni-W-O and Ni-Au-O species simultaneously present in the surface of trimetallic nanomaterial probably plays an important role in the degree of dispersion of the gold active phase.

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Section: Resultsmentioning

confidence: 99%

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

et al. 2021

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“…Also, other authors obtained similar products [10,11]. Alternatively, laser ablation of Ni target in Au colloidal solution can also be used for NP synthesis [12]. At these conditions, the formation of bimetallic Au@Ni NPs and complex NiO:Au nanoparticles occurred.…”

Section: Introductionmentioning

confidence: 87%

Au-Ni nanoparticles: Phase diagram prediction, synthesis, characterization, and thermal stability

Sopoušek

Kryštofová

Premović³

et al. 2017

Calphad

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The Au-Ni nanoparticles (NPs) were prepared by oleylamine solvothermal synthesis from metal precursors. The Au-Ni phase diagram prediction respecting the particle size was calculated by the CALPHAD method. The hydrodynamic size of the AuNi NPs in a nonpolar organic solvent was measured by the dynamic light scattering (DLS) method. The average hydrodynamic sizes of the nanoparticle samples were between 18 and 25 nm. The metallic composition of the AuNi NP samples was obtained by inductively-coupled plasma atomic emission spectroscopy (ICP-OES). The metallic fraction inside AuNi NPs was varied Au-(30-70) wt%Ni. The steric alkylamine stabilization was observed. The individual AuNi NPs were investigated by transmission electron microscopy (TEM). The dry nanopowder was also studied. The structures of the aggregated samples were investigated by scanning electron microscopy (SEM). The AuNi NPs reveal randomly mixed face-centered cubic (FCC) crystal lattices. The phase transformations were studied under inert gas and air. The samples were studied by differential scanning calorimetry (DSC).

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Au@CdO core/shell nanoparticles synthesized by pulsed laser ablation in Au precursor solution

et al. 2017

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Composition and structure of NiAu nanoparticles formed by laser ablation of Ni target in Au colloidal solution

Cited by 8 publications

References 38 publications

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

Au-Ni nanoparticles: Phase diagram prediction, synthesis, characterization, and thermal stability

Au@CdO core/shell nanoparticles synthesized by pulsed laser ablation in Au precursor solution

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