An extraordinarily stable catalyst: Pt NPs supported on two-dimensional Ti3C2X2 (X = OH, F) nanosheets for oxygen reduction reaction

Xie, Xiaohong; Chen, Siguo; Ding, Wei; Nie, Yan

doi:10.1039/c3cc44428g

Cited by 297 publications

(211 citation statements)

References 17 publications

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“…The few experimental results that exist to date have explored the use of MXenes in energy storage applications such as lithium ion batteries, LIBs, electrochemical capacitors (supercapacitors), and fuel cells. [ 26,45,[54][55][56] Early DFT calculations on Li intercalation into multilayer Ti 3 C 2 predicted the formation of Ti 3 C 2 Li 2 in Li rich environments, with a slightly positive enthalpy explained by the larger size of Li versus Al atoms. [ 5 ] The theoretical Li capacity in that case was found to be 320 mAh g -1 .…”

Section: Applicationsmentioning

confidence: 99%

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25th Anniversary Article: MXenes: A New Family of Two‐Dimensional Materials

et al. 2013

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Recently a new, large family of two-dimensional (2D) early transition metal carbides and carbonitrides, called MXenes, was discovered. MXenes are produced by selective etching of the A element from the MAX phases, which are metallically conductive, layered solids connected by strong metallic, ionic, and covalent bonds, such as Ti2 AlC, Ti3 AlC2 , and Ta4 AlC3 . MXenes -combine the metallic conductivity of transition metal carbides with the hydrophilic nature of their hydroxyl or oxygen terminated surfaces. In essence, they behave as "conductive clays". This article reviews progress-both -experimental and theoretical-on their synthesis, structure, properties, intercalation, delamination, and potential applications. MXenes are expected to be good candidates for a host of applications. They have already shown promising performance in electrochemical energy storage systems. A detailed outlook for future research on MXenes is also presented.

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Section: Applicationsmentioning

confidence: 99%

“…Very recently, Xie et al [ 56 ] used Ti 3 C 2 T x as a supporting material for platinum nano particles (Pt NPs) for fuel cell applications. They found that the Pt/Ti 3 C 2 T x combination was more durable and more electrochemically stable than the Pt/C catalysts that are conventionally used.…”

Section: Progress Reportmentioning

confidence: 99%

25th Anniversary Article: MXenes: A New Family of Two‐Dimensional Materials

et al. 2013

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“…Based on previous reports, MXenes also show great promise in many applications, owing to their excellent inherent physiochemical properties. These applications include electrodes for electrochemical supercapacitors, [8][9][10] promoters for catalysts, 11,12 and absorbents for heavy metal ions. 13 To further exploit the unique properties of MXenes (Ti 3 C 2 T x ), much effort has been dedicated to delaminating multilayered MXenes.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal properties of poly(vinylidene fluoride) composites with ultrathin nanosheets of MXene

et al. 2017

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Here, we report a facile method to delaminate MXene (Ti 3 C 2 T x ) and prepare poly(vinylidene fluoride) (PVDF)/MXene composites by solution blending. Compared with neat PVDF, the PVDF composites with varying content of MXene (0-5 wt%) showed an enhancement in the PVDF thermal conductivity. In particular, when a loading of 5 wt% was attained, the thermal conductivity was increased to 0.363 W mK À1 , an approximate 1-fold enhancement compared with that of neat PVDF. In addition, MXene also exhibited a better performance in enhancing the thermal dynamic mechanical properties of PVDF. For instance, PVDF composites with only 5 wt% MXene exhibited a storage modulus as high as 7501 MPa, corresponding to a 64% enhancement compared with that of neat PVDF. In light of the excellent thermal properties of the PVDF/MXene composites, they can be expected to have a wide range of potential applications in thermal interfacial materials and structural components.

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“…[ 8,9,14,15 ] They can also provide stability and durability for proton exchange membranes for fuel cells. [ 16 ] Other potential applications include water purifi cation, [ 17,18 ] electrochemical actuators, [ 19 ] photocatalysis, [ 20 ] transparent conductive electrodes and sensors. [ 7,21 ] Typically the resistivity of Ti 3 C 2 T x fi lms decreases with decreasing temperature from 300 down to 100 K, below which the resistance increases slightly.…”

mentioning

confidence: 99%

Synthesis and Characterization of 2D Molybdenum Carbide (MXene)

Halim

Kota

Lukatskaya

et al. 2016

Adv Funct Materials

1,007

771

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Large scale synthesis and delamination of 2D Mo 2 CT x (where T is a surface termination group) has been achieved by selectively etching gallium from the recently discovered nanolaminated, ternary transition metal carbide Mo 2 Ga 2 C. Different synthesis and delamination routes result in different fl ake morphologies. The resistivity of free-standing Mo 2 CT x fi lms increases by an order of magnitude as the temperature is reduced from 300 to 10 K, suggesting semiconductor-like behavior of this MXene, in contrast to Ti 3 C 2 T x which exhibits metallic behavior. At 10 K, the magnetoresistance is positive. Additionally, changes in electronic transport are observed upon annealing of the fi lms. When 2 µm thick fi lms are tested as electrodes in supercapacitors, capacitances as high as 700 F cm −3 in a 1 M sulfuric acid electrolyte and high capacity retention for at least 10,000 cycles at 10 A g −1 are obtained.Free-standing Mo 2 CT x fi lms, with ≈8 wt% carbon nanotubes, perform well when tested as an electrode material for Li-ions, especially at high rates. At 20 and 131 C cycling rates, stable reversible capacities of 250 and 76 mAh g −1 , respectively, are achieved for over 1000 cycles.

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An extraordinarily stable catalyst: Pt NPs supported on two-dimensional Ti3C2X2 (X = OH, F) nanosheets for oxygen reduction reaction

Abstract: High dispersion Pt nanoparticles supported on 2D Ti3C2X2 (X = OH, F) nanosheets are presented and electro-chemical measurements confirm that the Pt/Ti3C2X2 catalyst shows enhanced durability and improved ORR activity compared with the commercial Pt/C catalyst.

Cited by 297 publications

References 17 publications

25th Anniversary Article: MXenes: A New Family of Two‐Dimensional Materials

25th Anniversary Article: MXenes: A New Family of Two‐Dimensional Materials

Enhanced thermal properties of poly(vinylidene fluoride) composites with ultrathin nanosheets of MXene

Synthesis and Characterization of 2D Molybdenum Carbide (MXene)

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