Design and perspective of amorphous metal nanoparticles from laser synthesis and processing

Liang, Shun-Xing; Zhang, Lai-Chang; Reichenberger, Sven; Barcikowski, Stephan

doi:10.1039/d1cp00701g

Cited by 76 publications

(41 citation statements)

References 257 publications

(272 reference statements)

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“…With the high heating and cooling rates of more than 10 10 K/s during some particle formation processes in PLAL from the ablation plume, the NP formation is kinetically quenched [46,48,53,54]. Under these favorable conditions, the formation of amorphous oxide and carbide NPs [55][56][57][58], as well as high defect densities favorable for catalysis [57,58], have been found previously in PLAL. Due to their enhanced electrochemical properties, the synthesis of HEMG nanostructures is not only of prime relevance for applications in energy conversion and catalysis but also highly interesting from a fundamental point of view.…”

Section: Introductionmentioning

confidence: 57%

Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts

Johny

Kamp

et al. 2021

Nano Res.

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High entropy metallic glass nanoparticles (HEMG NPs) are very promising materials for energy conversion due to the wide tuning possibilities of electrochemical potentials offered by their multimetallic character combined with an amorphous structure. Up until now, the generation of these HEMG NPs involved tedious synthesis procedures where the generated particles were only available on highly specialized supports, which limited their widespread use. Hence, more flexible synthetic approaches to obtain colloidal HEMG NPs for applications in energy conversion and storage are highly desirable. We utilized pulsed laser ablation of bulk high entropy alloy targets in acetonitrile to generate colloidal carbon-coated CrCoFeNiMn and CrCoFeNiMnMo HEMG NPs. An in-depth analysis of the structure and elemental distribution of the obtained nanoparticles down to single-particle levels using advanced transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) methods revealed amorphous quinary and senary alloy phases with slight manganese oxide/hydroxide surface segregation, which were stabilized within graphitic shells. Studies on the catalytic activity of the corresponding carbon-HEMG NPs during oxygen evolution and oxygen reduction reactions revealed an elevated activity upon the incorporation of moderate amounts of Mo into the amorphous alloy, probably due to the defect generation by atomic size mismatch. Furthermore, we demonstrate the superiority of these carbon-HEMG NPs over their crystalline analogies and highlight the suitability of these amorphous multi-elemental NPs in electrocatalytic energy conversion.

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Section: Introductionmentioning

confidence: 57%

Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts

Johny

Kamp

et al. 2021

Nano Res.

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“…Müller's [36] and Ma's [31], and Liang's [30] groups summarized the merits of using lasersynthesized nanomaterials for catalytic applications. Liang and his colleagues [37] provided their perspectives on how to produce amorphous metal nanoparticles (NPs) and where to apply them. Magnetic particles/composites [38], monometallic and bimetallic Ni-Based NPs [39], rare-earth doped NPs [40], Ag NPs and their application as antimicrobial Figure 1 (Color online) Sketch of LAL, LFL, LML, and LDL and their advantages.…”

Section: Introductionmentioning

confidence: 99%

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Zhang

Liang

2022

Sci. China Phys. Mech. Astron.

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Diverse nanomaterials, in the forms of carbides, sulfides, oxides, metals, hydroxides, etc., have been synthesized by laser ablation in liquids (LAL) with metal targets as the dominant educts. Many advantages of LAL technique itself and its products have been revealed since 1983 when the first report about LAL was released. Different from traditional wet-chemical synthesis, one unique feature of LAL is its resultant extreme high-temperature and high-pressure local environment for the nucleation and growth of nanomaterials, despite being performed at room temperature. This extreme condition can induce the atomization and ionization of the target materials and liquid molecules to incur different chemical reactions. The laser, liquid, liquid additive, and target can significantly alter the local environment in a broad range. Thus, different phases and shapes of nanomaterials are producible even from the same target. Through directly comparing the products of LAL of 13 kinds of chosen representative metals synthesized under different conditions, this review presents and discusses current understandings, challenging issues, and perspectives related to the diversity of LAL-products, which is willing to promote a deeper investigation and discussion on a clear clarification of the chemical reactions and particle nucleation/growth processes.

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“…In the PLAL method, a laser beam is focused by an optical system on a solid target in a liquid environment, typically water, then the radiation absorbed by the target leads to the formation of an expanding plasma plume, which contains the ablated material and results in a nanoparticle suspension [25]. Moreover, by changing the parameters of the laser (fluence, wavelength, pulse duration) or the liquid media it is possible to obtain nanoparticles with tailored size, physicochemical and morphological properties [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Electro-Sorption of Hydrogen by Platinum, Palladium and Bimetallic Pt-Pd Nanoelectrode Arrays Synthesized by Pulsed Laser Ablation

et al. 2022

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Sustainable and renewable production of hydrogen by water electrolysers is expected to be one of the most promising methods to satisfy the ever-growing demand for renewable energy production and storage. Hydrogen evolution reaction in alkaline electrolyte is still challenging due to its slow kinetic properties. This study proposes new nanoelectrode arrays for high Faradaic efficiency of the electro-sorption reaction of hydrogen in an alkaline electrolyte. A comparative study of the nanoelectrode arrays, consisting of platinum or palladium or bimetallic nanoparticles (NPs) Pt80Pd20 (wt.%), obtained by nanosecond pulsed laser ablation in aqueous environment, casted onto graphene paper, is proposed. The effects of thin films of perfluoro-sulfonic ionomer on the material morphology, nanoparticles dispersion, and electrochemical performance have been investigated. The NPs-GP systems have been characterized by field emission scanning electron microscopy, Rutherford backscattering spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, cyclic voltammetry, and galvanostatic charge-discharge cycles. Faradaic efficiency up to 86.6% and hydrogen storage capacity up to 6 wt.% have been obtained by the Pt-ionomer and Pd/Pt80Pd20 systems, respectively.

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Design and perspective of amorphous metal nanoparticles from laser synthesis and processing

Abstract: Amorphous metal nanoparticles (A-NPs) have aroused great interest in their structural disordering nature and combined downsizing strategies (e.g. nanoscaling), both of which are beneficial for highly strengthened properties comparing to...

Cited by 76 publications

References 257 publications

Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts

Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Electro-Sorption of Hydrogen by Platinum, Palladium and Bimetallic Pt-Pd Nanoelectrode Arrays Synthesized by Pulsed Laser Ablation

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