Multiwall carbon nanotubes loaded with MoS2 quantum dots and MXene quantum dots: Non–Pt bifunctional catalyst for the methanol oxidation and oxygen reduction reactions in alkaline solution

Yang, Xinli; Jia, Qiaojuan; Duan, Fenghe; Hu, Bin; Wang, Minghua; He, Linghao; Song, Yingpan; Zhang, Zhihong

doi:10.1016/j.apsusc.2018.09.069

Cited by 131 publications

(96 citation statements)

References 72 publications

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“…No S 2p signal peak was found in hybrid samples, suggesting that the S 2p peak was masked by the presence of MWCNTs, which is in accordance with a previous report. 40 Figure 2 d shows the high-resolution spectra of O 1s of the two samples. The peaks at 533.4 and 532.2 eV are assigned to the C–O and C=O, whereas the peak at 530.7 eV is corresponding to the Mo–O bond, which are also consistent with ref ( 40 ).…”

Section: Results and Discussionmentioning

confidence: 99%

Anchoring Metallic MoS₂ Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines

Zhang

et al. 2021

ACS Omega

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Carbendazim, a very common contamination to the traditional Chinese medicines (TCMs), has posed serious threat to the environment and human health. However, sensitive and selective detection of carbendazim (MBC) in the TCMs is a big challenge for their complex chemical constituents. In this work, a 0D/1D nanohybrid was developed by anchoring 1T-phased MoS 2 quantum dots (QDs) over multiwall carbon nanotubes (MWCNTs) via a facile assembly method. High-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis (TGA) together with EIS reveal that the 1T-phased QDs can anchor over MWCNTs via van der Waals forces, and the anchoring improves the nanohybrid surface area and conductivity. Therefore, the electrochemical sensor fabricated based on the MoS 2 QDs@MWCNT nanohybrid shows excellent catalytic activity to MBC oxidation. Under optimized conditions, the sensor presents a linear voltammetry response to MBC concentration from 0.04 to 1.00 μmol•L −1 , a low detection limit of 2.6 × 10 −8 mol• L −1 , as well as high selectivity, good reproducibility, and long-term stability. Moreover, the sensor has been successfully employed to determine MBC in two typical TCMs and the obtained recoveries are in good accordance with the results achieved by HPLC, showing that the constructed sensor plate holds great practical application in MBC analysis with complex matrix.

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Section: Results and Discussionmentioning

confidence: 99%

Anchoring Metallic MoS₂ Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines

Zhang

et al. 2021

ACS Omega

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“…MoS 2 QDs@Ti 3 C 2 T x QDs@MMWCNTs provides a maximum methanol oxidation current density of 160 A g −1 at 2.2 V and are comparable with commercial Pt/C. [229] The catalytic activity of the CNTs was further improved by applying some doping strategies. Some of them are acid oxidation and side wall functionalization, which is complex and may, impair the mechanical properties of CNTs and also cause the addition of some unwanted species that can adversely affect the catalytic activity.…”

Section: Carbon Nanotubesmentioning

confidence: 99%

A comprehensive and critical review on recent progress in anode catalyst for methanol oxidation reaction

2020

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The synthesis of anode electrocatalyst with high activity and durability for methanol oxidation reaction has been one of the main focuses of researchers in recent years. Several works are reviewed in this paper to summarize and compare the performance of electrocatalysts comprising of noble and non-noble metals. The effect of manipulating catalysts by introducing nanostructured morphology, metal alloys, support materials, acidic or basic electrolyte, and synthesis methods are also examined. The paper finally concludes with details of challenges that are generally faced in making direct methanol fuel cell (DMFC) a reliable source of energy for future prospects, and the approach to be taken to reduce the complexity in synthesizing new generations of anode electrocatalysts.

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“…Yang et al [124] synthesized a new composite of multi-walled carbon nanotubes (MWCNTs) modified by MoS 2 quantum dots and Ti 3 C 2 T x quantum dots (denoted as MoS 2 QDs@ Ti 3 C 2 T x QDs@MWCNTs) and used it as a new type of electrocatalyst for MOR in alkaline solution. The results showed that the MoS 2 QDs@Ti 3 C 2 T x QDs@MWCNTs-2 could efficiently electro-oxidize methanol in KOH solution, presenting a high maximum current density of 160 A g −1 at the potential of 2.2 V. Encouragingly, the MoS 2 QDs@Ti 3 C 2 T x QDs@MWCNTs-2 exhibited the good electrocatalytic activity for MOR in alkaline media.…”

Section: Methanol Oxidation Reactionmentioning

confidence: 99%

Recent Progress in MXene‐Based Materials: Potential High‐Performance Electrocatalysts

Liu

Liang

Ren

et al. 2020

Adv Funct Materials

222

144

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The family of transition metal carbides, nitrides, and carbonitrides (collectively called MXenes) has been a thriving field since the first invention of Ti3C2Tx (MXene) in 2011. MXene is a new type of nanometer 2D sheet material, which exhibits great application potentials in various fields due to its multiple advantages such as high specific surface area, good electrical conductivity, and high mechanical strength. Electrocatalysis is regarded as the core of future clean energy conversion technologies, and MXene‐based materials provide inspiration for the design and preparation of electrocatalysts with high activity, high selectivity, and long loading life time. The applications of MXene‐based materials in electrocatalysis, including hydrogen evolution reaction, nitrogen reduction reaction, oxygen evolution reaction, oxygen reduction reaction, carbon dioxide reduction reaction, and methanol oxidation reaction are summarized in this review. As a crucial session regarding experiments, the current safer and more environmentally friendly preparation methods of MXene are also discussed. Focusing on the materials design and enhancement methods, the key challenges and opportunities for MXene‐based materials as a next‐generation platform in both fundamental research and practical electrocatalysis applications are presented. This account serves to promote future efforts toward the development of MXenes and related materials in the electrocatalysis applications.

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Multiwall carbon nanotubes loaded with MoS2 quantum dots and MXene quantum dots: Non–Pt bifunctional catalyst for the methanol oxidation and oxygen reduction reactions in alkaline solution

Cited by 131 publications

References 72 publications

Anchoring Metallic MoS₂ Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines

Anchoring Metallic MoS₂ Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines

A comprehensive and critical review on recent progress in anode catalyst for methanol oxidation reaction

Recent Progress in MXene‐Based Materials: Potential High‐Performance Electrocatalysts

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Multiwall carbon nanotubes loaded with MoS2 quantum dots and MXene quantum dots: Non–Pt bifunctional catalyst for the methanol oxidation and oxygen reduction reactions in alkaline solution

Cited by 131 publications

References 72 publications

Anchoring Metallic MoS2 Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines

Anchoring Metallic MoS2 Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines

A comprehensive and critical review on recent progress in anode catalyst for methanol oxidation reaction

Recent Progress in MXene‐Based Materials: Potential High‐Performance Electrocatalysts

Contact Info

Product

Resources

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Anchoring Metallic MoS₂ Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines

Anchoring Metallic MoS₂ Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines