Heterostructured two dimensional materials of MXene and graphene by hydrothermal method for efficient hydrogen production and HER activities

Thirumal, V.; Yuvakkumar, R.; Kumar, P. Senthil; Ravi, G.; Arun, A.; Guduru, Ramesh K.; Velauthapillai, Dhayalan

doi:10.1016/j.ijhydene.2021.12.045

Cited by 33 publications

(7 citation statements)

References 52 publications

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“…A variation in the I D /I G ratio is observed with an increment in the loading amount of GO, which is in the order of MG-50 (1.055) > MG-100 (1.038) > MG-75 (1.032) > MG-25 (0.827). A higher disorder intensity is observed for MG-50 composite due to the strong interaction or bonding between reduced graphene oxide and MXene sheet as compared to other composites 49,54,55 .…”

Section: Resultsmentioning

confidence: 88%

Reduced graphene oxide supported MXene based metal oxide ternary composite electrodes for non-enzymatic glucose sensor applications

Gopal

Alzahrani

Assaifan

et al. 2022

Sci Rep

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Diagnosis and monitoring of glucose level in human blood has become a prime necessity to avoid health risk and to cater this, a sensor’s performance with wide linearity range and high sensitivity is required. This work reports the use of ternary composite viz. MG–Cu2O (rGO supported MXene sheet with Cu2O) for non-enzymatic sensing of glucose. It has been prepared by co-precipitation method and characterized with X-ray powder diffraction, Ultraviolet–visible absorption spectroscopy (UV–Vis), Raman spectroscopy, Field emission scanning electron microscopy, High resolution transmission electron microscopy and Selected area diffraction. These analyses show a cubic structure with spherical shaped Cu2O grown on the MG sheet. Further, the electrocatalytic activity was carried out with MG–Cu2O sensing element by cyclic voltammetry and chronoamperometry technique and compared with M–Cu2O (MXene with Cu2O) composite without graphene oxide. Of these, MG–Cu2O composite was having the high defect density with lower crystalline size of Cu2O, which might enhance the conductivity thereby increasing the electrocatalytic activity towards the oxidation of glucose as compared to M–Cu2O. The prepared MG–Cu2O composite shows a sensitivity of 126.6 µAmM−1 cm−2 with a wide linear range of 0.01to 30 mM, good selectivity, good stability over 30 days and shows a low Relative Standard Deviation (RSD) of 1.7% value towards the sensing of glucose level in human serum. Thus, the aforementioned finding indicates that the prepared sensing electrode is a well suitable candidate for the sensing of glucose level for real time applications.

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Section: Resultsmentioning

confidence: 88%

Reduced graphene oxide supported MXene based metal oxide ternary composite electrodes for non-enzymatic glucose sensor applications

Gopal

Alzahrani

Assaifan

et al. 2022

Sci Rep

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“…This work provided the opportunity of heterostructure engineering on typical carbonaceous supports without incorporating active transition metal-based catalysts mentioned in all sections so far. Similarly, Thirumal et al 177 prepared 2D hybrid MX@RG from MXene and reduced GO (RG) hybrid layered composites via facile hydrothermal synthesis at 150°C. They observed the overpotential of 121 mV at 10 mA cm −2 and a Tafel slope of 229 mV dec −1 in 1 M KOH.…”

Section: Graphene-based Heterostructures For Hydrogen Evolution Reactionmentioning

confidence: 99%

Allying interfacial engineering of 2D carbon nanosheet‐, graphene‐, and graphdiyne‐based heterostructured electrocatalysts toward hydrogen evolution and overall water splitting

Mo,

Foo,

Ong

2024

Electron

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Electrochemical hydrogen evolution reaction (HER) and overall water splitting (OWS) for renewable energy generation have recently become a highly promising and sustainable strategy to tackle energy crisis and global warming arising from our overreliance on fossil fuels. Previously, tremendous research breakthroughs have been made in 2D carbon‐based heterostructured electrocatalysts in this field. Such heterostructures are distinguished by their remarkable electrical conductivity, exposed active sites, and mechanical stability. Herein, with fundamental mechanisms of electrocatalytic OWS summarized, our review critically emphasized on state‐of‐the‐art 2D carbon nanosheet‐, graphene‐, and graphdiyne‐based heterostructured electrocatalysts in HER and OWS since 2018. Particularly, the three emerging carbonaceous substrates tend to be incorporated with metal carbides, phosphides, dichalcogenides, nitrides, oxides, nanoparticles, single atom catalysts, or layered double hydroxides. Meanwhile, fascinating structural engineering and facile synthesis strategies were also unraveled to establish the structure–activity relationship, which will enlighten future electrocatalyst developments toward ameliorated HER and OWS activities. Additionally, computational results from density functional theory simulations were highlighted as well to better comprehend the synergistic effects within the heterostructures. Finally, current stages and future recommendations of this brand‐new electrocatalyst type were concluded and discussed for advanced catalyst designs and future practical applications.

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“…In addition, these catalysts showed a superior magnetic property and were proposed as promising materials for magnetic nanodevices. In a recent study by Thirumal et al , 120 they developed a 2D heterostructured graphene and MXene-based catalyst prepared by hydrothermal methods, which resulted in an overpotential value of 121 mV toward HER because 2D structured graphene can increase the conductivity and active platform, giving a better electrocatalytic response.…”

Section: Mxenes Based-electrocatalystmentioning

confidence: 99%

Recent development and challenges in fuel cells and water electrolyzer reactions: an overview

et al. 2022

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Heterostructured two dimensional materials of MXene and graphene by hydrothermal method for efficient hydrogen production and HER activities

Cited by 33 publications

References 52 publications

Reduced graphene oxide supported MXene based metal oxide ternary composite electrodes for non-enzymatic glucose sensor applications

Reduced graphene oxide supported MXene based metal oxide ternary composite electrodes for non-enzymatic glucose sensor applications

Allying interfacial engineering of 2D carbon nanosheet‐, graphene‐, and graphdiyne‐based heterostructured electrocatalysts toward hydrogen evolution and overall water splitting

Recent development and challenges in fuel cells and water electrolyzer reactions: an overview

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