Ultrathin 2D Rare‐Earth Nanomaterials: Compositions, Syntheses, and Applications

Xu, Jun; Chen, Xiaoyun; Xu, Yueshan; Du, Yaping; Yan, Chun‐Hua

doi:10.1002/adma.201806461

Cited by 113 publications

(73 citation statements)

References 91 publications

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“…[ 4 ] Rare earth (RE) elements, known as industrial vitamins, are widely used as dopants to enhance materials’ performances. [ 1b,5 ] With both academic and industrial interests in energy conversion processes, such as electrocatalytic and thermocatalytic reactions, the availability of suitable catalysts for target reactions with superior sustainability, selectivity, reactivity, and endurability is the key. [ 6 ] Recent studies have suggested that catalysts alloying with RE elements significantly influence their performance in energy conversion and storage.…”

Section: Introductionmentioning

confidence: 99%

Rare‐Earth Incorporated Alloy Catalysts: Synthesis, Properties, and Applications

et al. 2021

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and industrial interests in energy conversion processes, such as electrocatalytic and thermocatalytic reactions, the availability of suitable catalysts for target reactions with superior sustainability, selectivity, reactivity, and endurability is the key. [6] Recent studies have suggested that catalysts alloying with RE elements significantly influence their performance in energy conversion and storage. [7] The RE elements with unique electronic configurations of [Xe] 4f n−1 5d 0−1 6s 2 (n = 1-15) give an extra rhythm in tuning their functional properties from the perspective of their electronic and catalytic activities and are significantly promising in increasing the materials' activity and performance stability for a particular system of interest. [8] RE-based alloy catalysts have been ameliorating capabilities from both the RE elements and their alloys, which could pave the way for the industrialization of these alloy catalysts in the near future.Alloying with RE elements gives the alloy richer mechanistic functionalities, electronic structures, activities and spatial arrangements, resulting in well-controlled surface reaction kinetics and better reaction activities. [9] For instance, RE alloys have more stable structures than common transition-metalbased alloy catalyst due to the exceptionally negative alloy formation energies; Pt-RE alloys exhibit the highest activity of all ORR catalysts ever reported; and some RE alloys have low work function due to the anionic electrons contained in the unit cell etc. [7] Chemical synthesis of RE alloys for catalytic To improve the performance of metallic catalysts, alloying provides an efficient methodology to design state-of-the-art materials. As emerging functional materials, rare-earth metal compounds can integrate the unique orbital structure and catalytic behavior of rare earth elements into metallic materials. Such rare-earth containing alloy catalysts proffer an opportunity to tailor electronic properties, tune charged carrier transport, and synergize surface reactivity, which are expected to significantly improve the performance and stability of catalysis. Despite its significance, there are only few reviews on rare earth containing alloys or related topics. This review summarizes the composition, synthesis, and applications of rare earth containing alloys in the field of catalysis. Subsequent to comprehensively summarizing and constructively discussing the existing work, the challenges and possibilities of future research on rare-earth metal compound materials are evaluated.

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Section: Introductionmentioning

confidence: 99%

Rare‐Earth Incorporated Alloy Catalysts: Synthesis, Properties, and Applications

et al. 2021

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“…Nevertheless, the exfoliated graphene opened the era of 2D materials. Up to now, a great deal of 2D materials have been found experimentally or theoretically, examples including Dirac semimetals (graphene, silicene, germanene), semiconductors (transition metal dichalcogenides and phosphorene), and insulators (h-BN, 2D Rare-Earth Nanomaterials) [10][11][12][13][14][15][16][17][18][19][20]. Compared with three-dimensional bulk materials, 2D materials have their unique advantages, like surface plasmon resonance in metal nanoparticles and quantum confinement.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional functional materials: from properties to potential applications

Wei

Tang

Shang

et al. 2020

International Journal of Smart and Nano Materials

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Two-dimensional (2D) materials have been extensively investigated since the exfoliation of graphene. Due to the excellent and versatile properties, the promising applications in novel nanodevices have been proposed in the last few years. Here, we chose three stable 2D materials which have been experimentally synthesized and have potential to be used for next-generation nanodevices, namely semiconducting MoS 2 , Janus MoSSe, and magnetic CrI 3 , to review their electronic/ magnetic properties, and reveal the relationship of the propertiesapplications in devices. The showcase review on property-application is expected to provide new research insights into the investigations of 2D materials.

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“…Recently, highly‐crystalline fluoride nanoplates (NPLs) with rare earth doping have been employed to construct advanced optical devices with flexible design and moldability . However, it remains challenging to prepare highly‐crystalline, ultrathin fluoride NPLs via a simple, one‐step colloidal synthesis protocol, because of the requirements for reduced dimensionality, elevated crystallinity, and minimized surface defects . To date, only a few works have been reported, with research interests primarily focused on NaGdF 4 :Yb/Tm@NaGdF 4 :Tb, KYb 2 F 7 :Er, NaYF 4 :Yb/Er@NaYF 4 :Yb@NaNdF 4 :Yb, and KLu 2 F 7 :Yb/Er .…”

Section: Introductionmentioning

confidence: 99%

“…[5] However, it remains challenging to prepare highly-crystalline, ultrathin fluoride NPLs via a simple, onestep colloidal synthesis protocol, because of the requirements for reduced dimensionality, elevated crystallinity, and minimized surface defects. [6] To date, only a few works have been reported, with research interests primarily focused on NaGdF 4 :Yb/Tm@NaGdF 4 :Tb, [1] KYb 2 F 7 :Er, [7] NaYF 4 :Yb/Er@NaYF 4 :Yb@NaNdF 4 :Yb, [8] and KLu 2 F 7 :Yb/Er. [9] However, these HCNCs were obtained in oleic acid (OA)/octadecene (ODE) mixed solvents with NH 4 F and MOH (M = CH 3 , K + , Na + ) as precursors, whereas in other reaction systems, analogous results are rare.…”

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Upconversion Lifetime Imaging of Highly‐Crystalline Gd‐Based Fluoride Nanocrystals Featuring Strong Luminescence Resulting from Multiple Luminescent Centers

Zeng

Zhang

et al. 2019

Advanced Optical Materials

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Highly‐crystalline Gd‐based fluoride upconversion (UC) nanocrystals, including orthorhombic‐phase GdF3:Yb/Er nanoplates (NPLs), hexagonal‐phase NaGdF4:Yb/Er NPLs, monoclinic‐phase K3GdF6:Yb/Er nanoribbons (NRs), and orthorhombic‐phase KGdF4:Yb/Er NRs are controllably synthesized through a simple yet robust method, with all of the products exhibiting strong UC luminescence. Notably, the obtained K3GdF6:Yb/Er NRs have an exceptional quantum yield as high as 0.84% at a low excitation laser power (0.30 W cm−2, 975 nm), as well as long single‐particle UC lifetimes (τ) for green (τ = 0.70 ms) and red (τ = 1.10 ms) emissions. The enhanced luminescence is attributed to the “multiple luminescent center effect,” which is verified via the laser‐selective excitation spectra of deliberately introduced Eu3+ dopants. This method can be extended to the preparation of a number of other nanocrystals, and the UC nanocrystals featuring high luminescence efficiencies can be further tailored for biomedical applications.

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Ultrathin 2D Rare‐Earth Nanomaterials: Compositions, Syntheses, and Applications

Cited by 113 publications

References 91 publications

Rare‐Earth Incorporated Alloy Catalysts: Synthesis, Properties, and Applications

Rare‐Earth Incorporated Alloy Catalysts: Synthesis, Properties, and Applications

Two-dimensional functional materials: from properties to potential applications

Upconversion Lifetime Imaging of Highly‐Crystalline Gd‐Based Fluoride Nanocrystals Featuring Strong Luminescence Resulting from Multiple Luminescent Centers

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