Surface reorganization engineering of the N-doped MoS2 heterostructures MoOx@N-doped MoS2−x by in situ electrochemical oxidation activation for efficient oxygen evolution reaction

Wang, Yuanzhe; LIu, ShanShan; Hao, Xianfeng; Luan, Sunrui; You, Huanhuan; Zhou, Jianqiu; Song, Dandan; Wang, Dong; Hou, Li; Gao, Faming

doi:10.1039/c9ta01049a

Cited by 48 publications

(24 citation statements)

References 40 publications

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“…Currently, there are some studies reporting about doped MoS 2 serving as an adsorbent and a sensor [19][20][21][22][23]. It is reported that Ni-MoS 2 shows strong adsorption to O 2 [24][25][26][27][28][29][30][31][32][33]. Ni-doped MoS 2 film sensors have been verified to be a suitable candidate to detect SO 2 , one typical decomposition product of SF 6 [34].…”

Section: Introductionmentioning

confidence: 99%

Platinum modified MoS ₂ monolayer for adsorption and gas sensing of SF ₆ decomposition products: a DFT study

et al. 2020

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In the long‐running of sulphur hexafluoride (SF6)‐insulated equipment, SF6 inevitably decomposes to various decomposition products under electric discharge, including SOF2 and SO2F2. In this work, single Pt modified molybdenum disulphide (Pt‐MoS2) monolayer, and double Pt modified molybdenum disulphide (Pt2‐MoS2) monolayer are proposed to analyse its adsorption and sensing properties to SOF2 and SO2F2 with single and double gas molecules adsorption based on density functional theory. The adsorption energy, density of states, and molecular orbit theory are employed to analyse the adsorption and sensing mechanism. It turns out that the Pt‐MoS2 and Pt2‐MoS2 present outstanding adsorption capacity to gas molecules. Specifically, double SOF2 adsorption on Pt2‐MoS2 shows the best adsorption performance, and the conductivity of the adsorption system changes the most in the adsorption process. Overall, both Pt‐MoS2 and Pt2‐MoS2 perform as an excellent gas sensor. This study provides a theoretical basis to develop Pt‐MoS2 and Pt2‐MoS2 based materials for SOF2 and SO2F2 detection in SF6‐insulated equipment.

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Section: Introductionmentioning

confidence: 99%

Platinum modified MoS ₂ monolayer for adsorption and gas sensing of SF ₆ decomposition products: a DFT study

et al. 2020

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“…Lately, many researchers have tried to develop TMDs as stable and highly active OER catalysts for overall water splitting. [ 22–39 ] To impart such bifunctional catalytic activity, first transition metals such as Co and Ni are frequently incorporated in various approaches, including doping in the ionic form. Yet, there have been only a few studies on the bifunctional catalytic activity of the 1T (or 1T′) phase MoS 2 .…”

Section: Introductionmentioning

confidence: 99%

Ruthenium Nanoparticles on Cobalt‐Doped 1T′ Phase MoS₂ Nanosheets for Overall Water Splitting

Kwon

Debela

Kwak

et al. 2020

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2D MoS2 nanostructures have recently attracted considerable attention because of their outstanding electrocatalytic properties. The synthesis of unique Co–Ru–MoS2 hybrid nanosheets with excellent catalytic activity toward overall water splitting in alkaline solution is reported. 1T′ phase MoS2 nanosheets are doped homogeneously with Co atoms and decorated with Ru nanoparticles. The catalytic performance of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is characterized by low overpotentials of 52 and 308 mV at 10 mA cm−2 and Tafel slopes of 55 and 50 mV decade−1 in 1.0 m KOH, respectively. Analysis of X‐ray photoelectron and absorption spectra of the catalysts show that the MoS2 well retained its metallic 1T′ phase, which guarantees good electrical conductivity during the reaction. The Gibbs free energy calculation for the reaction pathway in alkaline electrolyte confirms that the Ru nanoparticles on the Co‐doped MoS2 greatly enhance the HER activity. Water adsorption and dissociation take place favorably on the Ru, and the doped Co further catalyzes HER by making the reaction intermediates more favorable. The high OER performance is attributed to the catalytically active RuO2 nanoparticles that are produced via oxidation of Ru nanoparticles.

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“…Nitrogen doping in MoS 2 was carried out via in situ electrochemical oxidation process and it was coupled to MoOx to form the hybrids. These electrodes were tested for OER, which exhibited an excellent electrocatalytic activity with a low overpotential of 270 mV at 10 mA cm −2 , a small Tafel slope of 61 mV dec −1 , and satisfactory stability . Edge contact geometry is adopted in the formation of well‐deﬁned and mixed dimensional W 17 O 47 –MoS 2 heterostructures.…”

Section: Applications Of Mos2 For Energy Conversion and Storagementioning

confidence: 99%

Molybdenum Disulphide Heterointerfaces as Potential Materials for Solar Cells, Energy Storage, and Hydrogen Evolution

Naik

Rabinal

2020

Energy Tech

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Molybdenum disulphide (MoS2), an ideal semiconductor, belongs to the group of 40 well‐identified transition metal dichalcogenides. These have unique chemical bonding; in an ideal case they do not feature dangling bonds and hence possess a layered‐like atomic structure, such that strong intraplane and weak interplane bondings exist. Hence, MoS2 can be peeled into a precisely controlled number of layers; the bulk with Eg = 1.2 eV can be reduced to a unit cell‐thick layer (monolayer) with Eg = 1.89 eV. However, in reality, both bulk and monolayers possess many types of atomic defects associated with in‐plane, edge, grain boundaries, etc. As a result, MoS2 exhibits many interesting and tunable optoelectronic properties suitable for a wide range of applications. Interestingly, its basic polyhedral form (MoS6) undergoes a structural change that leads to many polymorphic phases, the three in bulk and the five in monolayer. Theoretical predictions and experimental observations clearly confirm that MoS2 and its interfaces with other materials can be significantly important for energy conversion and storage applications, which are emerging and critically important topics of modern science and society. This Review provides an overview of the past few years of research and developments on these topics.

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Surface reorganization engineering of the N-doped MoS₂ heterostructures MoO_x@N-doped MoS_2−x by in situ electrochemical oxidation activation for efficient oxygen evolution reaction

Abstract: The unique heterostructure MoOx@N-doped MoS2−x was performed in situ by electrochemical oxidation, which showed remarkable OER activity.

Cited by 48 publications

References 40 publications

Platinum modified MoS ₂ monolayer for adsorption and gas sensing of SF ₆ decomposition products: a DFT study

Platinum modified MoS ₂ monolayer for adsorption and gas sensing of SF ₆ decomposition products: a DFT study

Ruthenium Nanoparticles on Cobalt‐Doped 1T′ Phase MoS₂ Nanosheets for Overall Water Splitting

Molybdenum Disulphide Heterointerfaces as Potential Materials for Solar Cells, Energy Storage, and Hydrogen Evolution

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Surface reorganization engineering of the N-doped MoS2 heterostructures MoOx@N-doped MoS2−x by in situ electrochemical oxidation activation for efficient oxygen evolution reaction

Abstract: The unique heterostructure MoOx@N-doped MoS2−x was performed in situ by electrochemical oxidation, which showed remarkable OER activity.

Cited by 48 publications

References 40 publications

Platinum modified MoS 2 monolayer for adsorption and gas sensing of SF 6 decomposition products: a DFT study

Platinum modified MoS 2 monolayer for adsorption and gas sensing of SF 6 decomposition products: a DFT study

Ruthenium Nanoparticles on Cobalt‐Doped 1T′ Phase MoS2 Nanosheets for Overall Water Splitting

Molybdenum Disulphide Heterointerfaces as Potential Materials for Solar Cells, Energy Storage, and Hydrogen Evolution

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Product

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Surface reorganization engineering of the N-doped MoS₂ heterostructures MoO_x@N-doped MoS_2−x by in situ electrochemical oxidation activation for efficient oxygen evolution reaction

Platinum modified MoS ₂ monolayer for adsorption and gas sensing of SF ₆ decomposition products: a DFT study

Platinum modified MoS ₂ monolayer for adsorption and gas sensing of SF ₆ decomposition products: a DFT study

Ruthenium Nanoparticles on Cobalt‐Doped 1T′ Phase MoS₂ Nanosheets for Overall Water Splitting