Recent progress of Ga-based liquid metals in catalysis

Sun, Xuming; Li, Hui

doi:10.1039/d2ra04795k

Cited by 16 publications

(12 citation statements)

References 82 publications

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“…A new group of catalysts that have recently emerged in both the experimental and computational literature are low temperature liquid metals. [1][2][3][4][5] These promising materials are typically characterised as pure metals or alloys which melt at notably lower temperatures than the majority of metals in the periodic table (oen <330 °C). 3 Recent high-prole reports of their catalytic activity include systems such as supported liquid Pd-Ga phases which are highly active and selective for butane dehydrogenation, 6 molten Ni-Bi for the pyrolysis of methane to produce H 2 , 4 and a liquid galinstan-Ce alloy for the reduction of CO 2 to solid carbon species.…”

Section: Introductionmentioning

confidence: 99%

Dynamic sampling of liquid metal structures for theoretical studies on catalysis

Ruffman,

Steenbergen,

Garden

et al. 2024

Chem. Sci.

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Section: Introductionmentioning

confidence: 99%

Dynamic sampling of liquid metal structures for theoretical studies on catalysis

Ruffman,

Steenbergen,

Garden

et al. 2024

Chem. Sci.

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“…products. − Nonvolatile solid nanocarbons are very attractive end products since they are suitable for long-term and safe storage. Moreover, they possess a great potential for applications in many fields, including energy storage materials. ,,, Different nanocarbon morphologies such as graphene, carbon nanotubes, nanofibers, nano-onions, nanospheres, nanocubes, nanosponges, or nanoscaffolds were derived from CO 2 by applying several methods like plasma, , electrochemical (molten salts ,,− and room temperature ,, ), and catalytic liquid metal , methods and conversion with the usage of reducing agents (hydrides/borohydrides ,, and alkali/alkaline earth metals ,,− ). The plasma and molten salt-assisted electrochemical methods are maybe the oldest methods used for CO 2 conversion to nanocarbons which, however, utilize sophisticated facilities.…”

Section: Introductionmentioning

confidence: 99%

CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

Giannakopoulou,

Todorova,

Plakantonaki

et al. 2023

ACS Omega

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The conversion of CO2 to nanocarbons addresses a dual goal of harmful CO2 elimination from the atmosphere along with the production of valuable nanocarbon materials. In the present study, a simple one-step metallothermic CO2 reduction to nanocarbons was performed at 675 °C with the usage of a Mg reductant. The latter was employed alone and in its mixture with ferrocene, which was found to control the morphology of the produced nanocarbons. Scanning electron microscopy (SEM) analysis reveals a gradual increase in the amount of nanoparticles with different shapes and a decrease in tubular nanostructures with the increase of ferrocene content in the mixture. A possible mechanism for such morphological alterations is discussed. Transmission electron microscopy (TEM) analysis elucidates that the nanotubes and nanoparticles gain mainly amorphous structures, while sheet- and cloud-like morphologies also present in the materials possess significantly improved crystallinity. As a result, the overall crystallinity was preserved constant for all of the samples, which was confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques. Finally, electrochemical tests demonstrated that the prepared nanocarbons retained high specific capacitance values in the range of 200–310 F/g (at 0.1 V/s), which can be explained by the measured high specific surface area (650–810 m2/g), total pore volume (1.20–1.55 cm3/g), and the degree of crystallinity. The obtained results demonstrate the suitability of ferrocene for managing the nanocarbons’ morphology and open perspectives for the preparation of efficient “green” nanocarbon materials for energy storage applications and beyond.

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“…It is well-known that although a Pt-based catalyst usually exhibits remarkable catalytic performances in alkane dehydrogenation, the active Pt sites have poor stability due to the susceptibility to sintering of metal nanoparticles and the strong adsorption between metal surfaces and alkene molecules, eventually causing the fast catalyst deactivation and the low isobutene selectivity, respectively. , To address these limitations, there are several recent studies demonstrating that the designer bimetallic nanoparticles containing Pt and promoters (e.g., Sn, , Zn, , and Ga , ) are enabled to enhance the catalytic behavior of alkane dehydrogenation due to the segregated Pt atoms on a solid support and the modified electronic properties of the nanoparticles. In addition to modifying active metals, the development of a catalyst support with a high surface area is essential to highly disperse the metal nanoparticles on a solid material.…”

Section: Introductionmentioning

confidence: 99%

Rational Design of Ultrasmall PtZn Nanoparticles Supported on Zeolite Composites as Bifunctional Catalysts for n-Butane Dehydroisomerization

Chaipornchalerm,

Nunthakitgoson,

Thepphankulngarm

et al. 2023

Ind. Eng. Chem. Res.

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The development of efficient technologies for light olefin production is crucial to the petrochemical industry. In particular, isobutene synthesis via n-butane dehydroisomerization, catalyzed by a bifunctional catalyst containing Pt nanoparticles supported on acidic zeolites, is one of the most significant catalytic pathways. However, it often suffers from low catalyst stability due to sintering and coke deposition, eventually hindering their catalytic performance. In this contribution, we report the rational design of ultrasmall PtZn nanoparticles supported on diverse zeolite composites containing different parent zeolites [e.g., ferrierite (FER), mordenite, and Zeolite Socony Mobil-5] as cores and hierarchical silicalite-1 (SN1) as shells via a two-step hydrothermal process. The synthesized composites revealed that the SN1 nanocrystals were fully covered on the outermost surfaces of core zeolites with highly dispersed PtZn nanoparticles on the SN1 phase. The synergistic effect of the additional zinc species in Pt, preventing sintering and altering electronic properties of metals, along with weakened Brønsted acidity at the outermost surface of a parent zeolite due to covered SN1 shells, enhanced the catalytic performance and stability in n-butane dehydroisomerization. Among several designer composites, FER/SN1 achieved the highest isobutene yield (16.2%) by suppressing side reactions through modified acid and shape-selective properties. These findings demonstrate the feasibility of the rational design of alloy nanoparticles supported on zeolite composites with modified acid and shape-selective properties for isobutene production.

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Recent progress of Ga-based liquid metals in catalysis

Abstract: Liquid metal catalysts: multiple applications in energy and environmental industries.

Cited by 16 publications

References 82 publications

Dynamic sampling of liquid metal structures for theoretical studies on catalysis

Dynamic sampling of liquid metal structures for theoretical studies on catalysis

CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

Rational Design of Ultrasmall PtZn Nanoparticles Supported on Zeolite Composites as Bifunctional Catalysts for n-Butane Dehydroisomerization

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Recent progress of Ga-based liquid metals in catalysis

Abstract: Liquid metal catalysts: multiple applications in energy and environmental industries.

Cited by 16 publications

References 82 publications

Dynamic sampling of liquid metal structures for theoretical studies on catalysis

Dynamic sampling of liquid metal structures for theoretical studies on catalysis

CO2-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

Rational Design of Ultrasmall PtZn Nanoparticles Supported on Zeolite Composites as Bifunctional Catalysts for n-Butane Dehydroisomerization

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CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance