Deep insights into the exfoliation properties of MAX to MXenes and the hydrogen evolution performances of 2D MXenes

Cheng, Yuwen; Wang, Limin; Song, Yan; Zhang, Yumin

doi:10.1039/c9ta03859k

Cited by 71 publications

(36 citation statements)

References 46 publications

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“…Ti 3 C 2 MXenes are a type of layered two-dimensional (2D) transition metal carbide which possess many excellent characteristics, such as excellent electrical conductivity, extraordinary catalytic properties, low toxicity, and large surface area, − and exhibit an outstanding performance in sensing, electronic devices, catalysis fields, − and energy storage materials. , Moreover, the physical and chemical performances of MXenes could also be improved by the size regulation, surface functionalization, and so on. For instance, the Ti sites were considered as the active sites for nitrogen reduction; the vertical orientation of MXene can expose more Ti active sites for electrocatalysis .…”

Section: Introductionmentioning

confidence: 99%

Integrating Highly Efficient Recognition and Signal Transition of g-C₃N₄ Embellished Ti₃C₂ MXene Hybrid Nanosheets for Electrogenerated Chemiluminescence Analysis of Protein Kinase Activity

Sun

Zhang

et al. 2020

Anal. Chem.

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Herein, a novel electrogenerated chemiluminescence (ECL) method for highly sensitive kinase activity and inhibitors screening was developed based on graphitic carbon nitride nanosheet (g-C3N4) nanoparticle embellished titanium carbide (Ti3C2) MXene nanosheets, integrating the highly efficient recognition and signal amplification activity. In this strategy, kemptide was first immobilized onto a gold electrode, and it was phosphorylated by the protein kinase A which was used as a model. The g-C3N4-MXene probe can adsorb explicitly onto the electrode based on chelation between the phosphate group and Ti defect sites enriched in MXenes. Besides the abundant active sites on MXene for the highly efficient binding with phosphate groups, the Ti3C2 MXene not only provides a unique conductive platform to accommodate more g-C3N4 nanoparticles but also facilitates the electron transfer on the electrode interface and suppresses the passivation of g-C3N4 that explores their highly efficient ECL emission with high stability. The obtained ECL signals were closely related to the kinase activity and can be applied for protein kinase A (PKA) activity detection. Under the optimal conditions, the proposed ECL biosensor provided a quantitative readout to PKA concentration in the range 0.015–40 U mL–1 with the detection limit of 1.0 mU mL–1. The ECL biosensor was also successfully applied to monitor drug-triggered kinase activation and quantitative analysis of the kinase inhibitors in MCF-7 cell lysates. This work shows that the proposed ECL biosensor has the potential to be a powerful tool for PKA study and clinical diagnostics as well as the discovery of new targeted drugs.

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Section: Introductionmentioning

confidence: 99%

Integrating Highly Efficient Recognition and Signal Transition of g-C₃N₄ Embellished Ti₃C₂ MXene Hybrid Nanosheets for Electrogenerated Chemiluminescence Analysis of Protein Kinase Activity

Sun

Zhang

et al. 2020

Anal. Chem.

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“…The experimental overpotentials of Ti 3 C 2 T x MXene displayed the following order of Ti 3 C 2 T x -high F > Ti 3 C 2 T x -medium F > Ti 3 C 2 T x -low F at ‒10 mA·cm −2 current density, which was associated with the hydrogenation step during electrochemical reduction. Owning to the different densities of F-termination on the MXene surface, the hydrogenation step could be inhibited [ 31 ]. The Ti 3 C 2 T x -high F sample had the highest density of fluorine terminal groups, resulting in the inhibition of H + adsorption [ 32 ] and eventually the decline of N 2 RR activity.…”

Section: Resultsmentioning

confidence: 99%

Promoting N2 electroreduction to ammonia by fluorine-terminating Ti3C2Tx MXene

et al. 2021

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Two-dimensional MXene-based materials are potential of presenting unique catalytic performances of electrocatalytic reactions. The surface functionalization of MXene-based catalysts is attractive for developing efficient electrocatalysts toward nitrogen reduction reaction. Herein, we reported a Ti3C2Tx MXene with a medium density of surface functionalized fluorine terminal groups, as an excellent N2 reduction reaction electrocatalyst with enhanced adsorption and activation of N2. The Ti3C2Tx MXene catalyst showed a production rate of ammonia as 2.81 × 10–5 μmol·s−1·cm−2, corresponding to a partial current density of 18.3 μA·cm−2 and a Faradic efficiency of 7.4% at − 0.7 V versus reversible hydrogen electrode in aqueous solutions at ambient conditions, substantially exceeding similar Ti3C2Tx MXene catalysts but with higher or lower densities of surface fluorine terminal groups. Our work suggests the capability of developing surface functionalization toolkit for enhancing electrochemical catalytic activities of two-dimensional MXene-based materials.

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“…80 Interestingly, the exfoliation of MXene into few layers or monolayer plays vital role in providing platform for electrocatalytic reactions. 81 A new class of in-plane and out-of-plane MXenes were reported with M of MAX phase having two different metals alloyed together. For example, out of plane ordered MXene (o-MXene) has the arrangement where in a Cr 2 TiAlC 2 , Ti layer of MAX phase is sandwiched between the two outer Cr carbide layer it is usually in the form M 3 AX 2 and M 4 AX 3 .…”

Section: Surface Engineering Of Mxene Nanosheets For Electrocatalytic...mentioning

confidence: 99%

“…The exfoliation process in MXene is more complicated due to the strong metallic bonding between Ti and interleaved Al atoms in MAX phase due to this reason the exfoliation process is complicated than that of the van der Waals solids 80 . Interestingly, the exfoliation of MXene into few layers or monolayer plays vital role in providing platform for electrocatalytic reactions 81 …”

Section: Surface Engineering Of Mxene Nanosheets For Electrocatalytic...mentioning

confidence: 99%

Recent advances in MXene as electrocatalysts for sustainable energy generation: A review on surface engineering and compositing of MXene

Das

Balaji

Dutta

et al. 2022

Intl J of Energy Research

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The electrocatalysis have a crucial role in the journey towards sustainable energy-economy. By observing present scenario, it can be inferred that the electrochemical energy technologies have become an inseparable system in our everyday-life. From generating green fuels to fabrication of high rechargeable electrochemical systems, are being achieved with the help of electrocatalyst. But, the shortage of pertinent catalysts has hindered this process. The desirable factors mainly required in a suitable electrocatalyst are its economic feasibility, robustness, reusability, and performance efficiency. To achieve that, scientists from all over the globe recommended various options, where tuning the MXenes are one of them. Characteristics like hydrophilicity, superior conductivity, and facile processing techniques have made them prominent choice for the applications. Further, enhancements like forming hybrids, different procedures of synthesis of its sheets are done to alter the electronic and structural features to achieve better catalytic activity. In this article, we are going to illustrate some of the important synthesis strategies, applications along with their pros and cons. This article promotes recent advancements in the surface engineering of MXene and its composites such as electrocatalyst in hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR); meanwhile invites researchers from different fields of science applications to contribute in this research to expand its extent.

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Deep insights into the exfoliation properties of MAX to MXenes and the hydrogen evolution performances of 2D MXenes

Abstract: Surface terminated O-p orbital center εp, could be used as a good descriptor for HER of MXenes.

Cited by 71 publications

References 46 publications

Integrating Highly Efficient Recognition and Signal Transition of g-C₃N₄ Embellished Ti₃C₂ MXene Hybrid Nanosheets for Electrogenerated Chemiluminescence Analysis of Protein Kinase Activity

Integrating Highly Efficient Recognition and Signal Transition of g-C₃N₄ Embellished Ti₃C₂ MXene Hybrid Nanosheets for Electrogenerated Chemiluminescence Analysis of Protein Kinase Activity

Promoting N2 electroreduction to ammonia by fluorine-terminating Ti3C2Tx MXene

Recent advances in MXene as electrocatalysts for sustainable energy generation: A review on surface engineering and compositing of MXene

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Deep insights into the exfoliation properties of MAX to MXenes and the hydrogen evolution performances of 2D MXenes

Abstract: Surface terminated O-p orbital center εp, could be used as a good descriptor for HER of MXenes.

Cited by 71 publications

References 46 publications

Integrating Highly Efficient Recognition and Signal Transition of g-C3N4 Embellished Ti3C2 MXene Hybrid Nanosheets for Electrogenerated Chemiluminescence Analysis of Protein Kinase Activity

Integrating Highly Efficient Recognition and Signal Transition of g-C3N4 Embellished Ti3C2 MXene Hybrid Nanosheets for Electrogenerated Chemiluminescence Analysis of Protein Kinase Activity

Promoting N2 electroreduction to ammonia by fluorine-terminating Ti3C2Tx MXene

Recent advances in MXene as electrocatalysts for sustainable energy generation: A review on surface engineering and compositing of MXene

Contact Info

Product

Resources

About

Integrating Highly Efficient Recognition and Signal Transition of g-C₃N₄ Embellished Ti₃C₂ MXene Hybrid Nanosheets for Electrogenerated Chemiluminescence Analysis of Protein Kinase Activity

Integrating Highly Efficient Recognition and Signal Transition of g-C₃N₄ Embellished Ti₃C₂ MXene Hybrid Nanosheets for Electrogenerated Chemiluminescence Analysis of Protein Kinase Activity