Enabling methanol oxidation by an interacting hybrid nanosystem of spinel Co<sub>3</sub>O<sub>4</sub> nanoparticle decorated MXenes

Baruah, Kashmiri; Deb, Pritam

doi:10.1039/d1dt03671h

Cited by 14 publications

(5 citation statements)

References 82 publications

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“…For these reasons, we assessed the UOR and HER performances of cobalt oxide (Co 3 O 4 ) with tunable morphological features and varying degrees of crystallinity . Up to now, Co 3 O 4 has been extensively studied in other energy-related fields and thus has a sound research background. − The main factors currently limiting the application of Co 3 O 4 in the UOR and HER are poor electrical conductivity and insufficient exposure of active sites due to particle agglomeration. To address these problems, we introduced titanium carbide (Ti 3 C 2 ) MXene, which owns both high conductivity , and enhanced specific surface area due to its layered structure, as a support material.…”

Section: Introductionmentioning

confidence: 99%

0D/2D Co₃O₄/Ti₃C₂ MXene Composite: A Dual-Functional Electrocatalyst for Energy-Saving Hydrogen Production and Urea Oxidation

Zhang

Addad

et al. 2022

ACS Appl. Energy Mater.

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Electrocatalytic water splitting to produce hydrogen (H2) is a sustainable way of meeting energy demands at no environmental cost. However, the sluggish anodic reaction imposes a considerable overpotential requirement. By contrast, the electrocatalytic urea oxidation reaction offers the prospect of energy-saving H2 production together with urea-rich wastewater purification. In this work, a 0D/2D Co3O4/Ti3C2 MXene composite was synthesized by a simple solution reaction approach under mild conditions and applied as an efficient and stable electrocatalyst for hydrogen evolution reaction (HER) and urea oxidation reaction (UOR) in basic medium (1 M KOH+0.5 M urea). The Co3O4/Ti3C2 MXene electrodes delivered a current density of 10 mA cm–2 at an overpotential of 124 mV for HER and required 1.40 V to reach 10 mA cm–2 for UOR. The hybrid catalyst could maintain high activity after 40 h continuous catalytic reaction for both UOR and HER. Its catalytic performance was significantly improved compared to that of pure Ti3C2 MXene and Co3O4 solving the problem of insufficient exposure of active sites caused by too large particle size and agglomeration of Co3O4 particles. Notably, Co3O4/Ti3C2 MXene was applied as a bifunctional catalyst for overall urea-containing water splitting, and showed certain energy saving advantages compared with other reported Co-based catalysts. This work provides a strategy for application other than noble metal-based electrode materials for urea-containing wastewater purification coupled with H2 production.

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Section: Introductionmentioning

confidence: 99%

0D/2D Co₃O₄/Ti₃C₂ MXene Composite: A Dual-Functional Electrocatalyst for Energy-Saving Hydrogen Production and Urea Oxidation

Zhang

Addad

et al. 2022

ACS Appl. Energy Mater.

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“…In both cases, initially there is a small decrease in current density. In the case of MOR, it is due to the formation of CO intermediate species . On the other hand, insufficient electrode wettability during the initial period of electrolysis is due to the formation of bubbles on the electrode surface, which blocks the active sites and reduces the electrolyte/electrode contact and hence results in an initial decrease in current density.…”

Section: Resultsmentioning

confidence: 99%

Modulation of Surface Ti–O Species in 2D-Ti₃C₂T_X MXene for Developing a Highly Efficient Electrocatalyst for Hydrogen Evolution and Methanol Oxidation Reactions

et al. 2023

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Developing cost-effective and earth-abundant noblemetal-free electrocatalysts is imperative for the imminent electrochemical society. Two-dimensional Ti 3 C 2 T X (MXene) exhibits tunable properties with high electrical conductivity and a large specific surface area, which improve its electrochemical performance. Herein, the lowtemperature annealing method is used to enrich MXene with a maximum number of Ti−O terminals without formation of titanium dioxide (TiO 2 ) under neutral pH conditions. MXene annealed at 200 °C is found to have a large number of Ti−O termination groups, resulting in a large electrochemically active surface area and increased active sites (−O termination groups) and hence excellent electrocatalytic performance compared to other samples as well as previous reported work. The optimized sample is found to show the lowest overpotential value of 0.07 V at 10 mA cm −2 and a Tafel slope of 0.15 V dec −1 toward the hydrogen evolution reaction (HER), whereas for the methanol oxidation reaction (MOR), the current density is 18.08 mA cm −2 , and the onset potential is −0.51 V. In addition, it also shows long-term stability and durability toward HER as well as MOR.

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“…In recent years, a wide variety of narrow band gap semiconductor-based PDs have been reported [29][30][31][32][33][34][35][36][37][38][39][40]. Such PDs are still restricted in practical application of devices because of lacking broadband absorption, low stability and slow responses.…”

Section: Two Dimensional (2d) Materialsmentioning

confidence: 99%

Quantum enhanced efficiency and spectral performance of paper-based flexible photodetectors functionalized with two dimensional materials

Sharma,

Mazumder,

Ajayan

et al. 2024

J. Phys.: Condens. Matter

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Flexible photodetectors have exotic significance in recent years due to their enchanting potential in future optoelectronics. Moreover, paper-based fabricated photodetectors with outstanding flexibility unlock new avenues for future wearable electronics. Such photodetector has captured scientific interest for its efficient photoresponse properties due to the extraordinary assets like significant absorptive efficiency, surface morphology, material composition, affordability, bendability, and biodegradability. Quantum-confined materials harness the unique quantum-enhanced properties and hold immense promise for advancing both fundamental scientific understanding and practical implication. Two-dimensional (2D) materials as quantum materials have been one of the most extensively researched materials owing to their significant light absorption efficiency, increased carrier mobility, and tunable band gaps. In addition, 2D heterostructures can trap charge carriers at their interfaces, leading increase in photocurrent and photoconductivity. This review represents comprehensive discussion on recent developments in such photodetectors functionalized by 2D materials, highlighting charge transfer mechanism at their interface. This review thoroughly explains the mechanism behind the enhanced performance of quantum materials across a spectrum of figure of merits including external quantum efficiency, detectivity, spectral responsivity, optical gain, response time, and noise equivalent power. The present review studies the intricate mechanisms that reinforce these improvements, shedding light on the intricacies of quantum materials and their significant capabilities. Moreover, a detailed analysis of the technical applicability of paper-based photodetectors has been discussed with challenges and future trends, providing comprehensive insights into their practical usage in the field of future wearable and portable electronic technologies.

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Enabling methanol oxidation by an interacting hybrid nanosystem of spinel Co₃O₄ nanoparticle decorated MXenes

Abstract: For the successful implementation of direct methanol fuel cells in the commercial applications, highly efficient and durable non-noble electrocatalyst based on conducting and stable non-carbonaceous support can be a potential...

Cited by 14 publications

References 82 publications

0D/2D Co₃O₄/Ti₃C₂ MXene Composite: A Dual-Functional Electrocatalyst for Energy-Saving Hydrogen Production and Urea Oxidation

0D/2D Co₃O₄/Ti₃C₂ MXene Composite: A Dual-Functional Electrocatalyst for Energy-Saving Hydrogen Production and Urea Oxidation

Modulation of Surface Ti–O Species in 2D-Ti₃C₂T_X MXene for Developing a Highly Efficient Electrocatalyst for Hydrogen Evolution and Methanol Oxidation Reactions

Quantum enhanced efficiency and spectral performance of paper-based flexible photodetectors functionalized with two dimensional materials

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Enabling methanol oxidation by an interacting hybrid nanosystem of spinel Co3O4 nanoparticle decorated MXenes

Abstract: For the successful implementation of direct methanol fuel cells in the commercial applications, highly efficient and durable non-noble electrocatalyst based on conducting and stable non-carbonaceous support can be a potential...

Cited by 14 publications

References 82 publications

0D/2D Co3O4/Ti3C2 MXene Composite: A Dual-Functional Electrocatalyst for Energy-Saving Hydrogen Production and Urea Oxidation

0D/2D Co3O4/Ti3C2 MXene Composite: A Dual-Functional Electrocatalyst for Energy-Saving Hydrogen Production and Urea Oxidation

Modulation of Surface Ti–O Species in 2D-Ti3C2TX MXene for Developing a Highly Efficient Electrocatalyst for Hydrogen Evolution and Methanol Oxidation Reactions

Quantum enhanced efficiency and spectral performance of paper-based flexible photodetectors functionalized with two dimensional materials

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Enabling methanol oxidation by an interacting hybrid nanosystem of spinel Co₃O₄ nanoparticle decorated MXenes

0D/2D Co₃O₄/Ti₃C₂ MXene Composite: A Dual-Functional Electrocatalyst for Energy-Saving Hydrogen Production and Urea Oxidation

0D/2D Co₃O₄/Ti₃C₂ MXene Composite: A Dual-Functional Electrocatalyst for Energy-Saving Hydrogen Production and Urea Oxidation

Modulation of Surface Ti–O Species in 2D-Ti₃C₂T_X MXene for Developing a Highly Efficient Electrocatalyst for Hydrogen Evolution and Methanol Oxidation Reactions