Recent progress in two-dimensional Nb2C MXene for applications in energy storage and conversion

Ponnalagar, Dineshkumar; Hang, Da-Ren; Islam, Sk Emdadul; Liang, Chi-Te; Chou, Mitch M.C.

doi:10.1016/j.matdes.2023.112046

Cited by 22 publications

(2 citation statements)

References 209 publications

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“…The previous study also did not examine the dissolution of the support and iridium, as we have done here, and it should be noted that we are studying Nb(C,N) materials and not NbC, and differences in the surface chemistry are likely to play an important role in the interaction with iridium. Finally, it is worth pointing out that our materials are distinct from the two-dimensional MXene carbides that have been studied as catalysts and catalysts support, and the MXene Nb 2 C provides a comparison, for which its instability under oxidative and aqueous conditions, 48 along with its complex synthesis that typically involves highly corrosive chemicals, 49 makes it unsuited for the applications we have explored here for the rock-salt niobium carbonitride.…”

Section: Resultsmentioning

confidence: 99%

Nanostructured Niobium and Titanium Carbonitrides as Electrocatalyst Supports

McLeod,

Spikes,

Zalitis

et al. 2024

ACS Appl. Nano Mater.

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Nanostructured niobium−titanium carbonitrides, (Nb,Ti)C 1−x N x , with the cubic-rock salt structure are prepared without the use of reactive gases via thermal treatment (700−1200 °C) under nitrogen of mixtures of guanidine carbonate and ammonium niobate (V) oxalate hydrate, with addition of ammonium titanyl oxalate monohydrate as a titanium source. The bulk structure and chemical composition of the materials are characterized using powder X-ray diffraction (XRD) and powder neutron diffraction, elemental homogeneity is studied using energy dispersive spectroscopy (EDS) mapping using transmission electron microscopy (TEM), and surface chemical analysis is examined using X-ray photoelectron spectroscopy (XPS). Nanoscale crystallites of between 10 and 50 nm are observed by TEM, where EDS reveals the homogeneity of metal distribution for the mixed-metal materials. Titanium carbonitrides are found to be air sensitive, reacting with air under ambient conditions, while titanium−niobium carbonitrides are found to degrade in aqueous sulfuric acid. The niobium carbonitrides, however, show some stability toward acidic solutions. Materials are produced with composition NbC 1−x N x with x between 0.35 and 0.45, and more carbon-rich materials (x ≈ 0.35) are found as the synthesis temperature is increased, as proven by Rietveld refinement of crystal structure against powder neutron diffraction data. Despite phase purity seen by diffraction and negligible bulk carbon content, XPS shows a complex surface chemistry for the NbC 1−x N x materials, with evidence for Nb 2 O 5like oxide species in a carbon-rich environment. The NbC 1−x N x prepared at 900 °C has a surface area around 50 m 2 g −1 , making it suitable as a catalyst support. Loading with iridium provides a material active for the oxygen evolution reaction in 0.1 M sulfuric acid, with minimal leaching of either Nb or Ir after 1000 cycles.

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Section: Resultsmentioning

confidence: 99%

Nanostructured Niobium and Titanium Carbonitrides as Electrocatalyst Supports

McLeod,

Spikes,

Zalitis

et al. 2024

ACS Appl. Nano Mater.

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“…96,97 Incorporating 2D material in PSC has attracted extensive attention due to the high conductivity and good charge carrier mobility. 98,99 MXene, with customizable structural and chemical forms, could exhibit superconductivity at appropriate temperatures. The surface chemistry can be chemically manipulated by varying the concentration and the etchant type, including the feasibility of tuning the bandgap for suitable WF.…”

Section: Literature Reviewmentioning

confidence: 99%

The dawn of MXene duo: revolutionizing perovskite solar cells with MXenes through computational and experimental methods

Marimuthu,

Prabhakaran Shyma,

Sathyanarayanan

et al. 2024

Nanoscale

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Photothermal Driven Biomimetic Actuator Based on Asymmetric Microstructure Nb₂CT_x MXene Film

Li,

Sun,

Zhang

et al. 2024

Adv Elect Materials

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The complex preparation process and low sensitivity have hindered the further application of current MXene‐based biomimetic actuators. In this paper, a photothermal biomimetic actuator based on an asymmetric niobium carbide (Nb2CTx) MXene film is prepared using the solution casting method, enabling interactions with various environments. Nb2CTx absorbs incident photons to provide an energy basis for the deformation of the actuator. Polyvinylidene fluoride (PVDF) with excellent film‐forming properties is used to overcome the brittleness of Nb2CTx to improve the flexibility of the film. Additionally, polyethylene (PE) film can increase the coefficient of thermal expansion (CTE) difference between the materials, providing a mechanical basis for the actuator's deformation. The actuator can respond quickly at low optical power density conditions and produce large bending angles (202° in 2.72 s). It also shows excellent performance in applications such as flexible crawling robots (30 mm in 54 s), smart mechanical clamps (lifting objects ten times their own weight), and smart lighting systems (multi‐light source response). These results not only demonstrate the immense potential of PE/PVDF/MXene composites in biomimetic actuation but also provide new inspiration for exploring the application of other types of MXene in this field.

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Recent progress in two-dimensional Nb2C MXene for applications in energy storage and conversion

Cited by 22 publications

References 209 publications

Nanostructured Niobium and Titanium Carbonitrides as Electrocatalyst Supports

Nanostructured Niobium and Titanium Carbonitrides as Electrocatalyst Supports

The dawn of MXene duo: revolutionizing perovskite solar cells with MXenes through computational and experimental methods

Photothermal Driven Biomimetic Actuator Based on Asymmetric Microstructure Nb₂CT_x MXene Film

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Recent progress in two-dimensional Nb2C MXene for applications in energy storage and conversion

Cited by 22 publications

References 209 publications

Nanostructured Niobium and Titanium Carbonitrides as Electrocatalyst Supports

Nanostructured Niobium and Titanium Carbonitrides as Electrocatalyst Supports

The dawn of MXene duo: revolutionizing perovskite solar cells with MXenes through computational and experimental methods

Photothermal Driven Biomimetic Actuator Based on Asymmetric Microstructure Nb2CTx MXene Film

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Photothermal Driven Biomimetic Actuator Based on Asymmetric Microstructure Nb₂CT_x MXene Film