Large-scale preparation of 2D VSe2 through a defect-engineering approach for efficient hydrogen evolution reaction

Fu, Jianan; Ali, Rashad; Mu, Chunlai; Liu, Yifan; Mahmood, Nasir; Lau, Woon‐Ming; Jian, Xian

doi:10.1016/j.cej.2021.128494

Cited by 38 publications

(24 citation statements)

References 59 publications

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“…DFTs have been extensively utilized to analyze the sensing properties of different materials and great successes have been achieved in various fields [ 5 , 53 , 54 ]. For example, Monrudee Liangruksa’s team applied DFT to study the sensing properties of palladium-modified ZnO nanofilms to target gases (i.e., hydrogen (H 2 ) and C 2 H 5 OH).…”

Section: Resultsmentioning

confidence: 99%

Ethanol Sensing Properties and First Principles Study of Au Supported on Mesoporous ZnO Derived from Metal Organic Framework ZIF-8

Kang

Zhang

Wang

et al. 2021

Sensors

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It is of great significance to develop ethanol sensors with high sensitivity and low detection temperature. Hence, we prepared Au-supported material on mesoporous ZnO composites derived from a metal-organic framework ZIF-8 for the detection of ethanol gas. The obtained Au/ZnO materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (SEM), field emission transmission electron microscopy (TEM) and nitrogen adsorption and desorption isotherms. The results showed that the Au/ZnO-1.0 sample maintains a three-dimensional (3D) dodecahedron structure with a larger specific surface area (22.79 m2 g−1) and has more oxygen vacancies. Because of the unique ZIF structure, abundant surface defects and the formation of Au-ZnO Schottky junctions, an Au/ZnO-1.0 sensor has a response factor of 37.74 for 100 ppm ethanol at 250 °C, which is about 6 times that of pure ZnO material. In addition, the Au/ZnO-1.0 sensor has good selectivity for ethanol. According to density functional theory (DFT) calculations, the adsorption energy of Au/ZnO for ethanol (−1.813 eV) is significantly greater than that of pure ZnO (−0.217 eV). Furthermore, the adsorption energy for ethanol is greater than that of other gases.

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Section: Resultsmentioning

confidence: 99%

Ethanol Sensing Properties and First Principles Study of Au Supported on Mesoporous ZnO Derived from Metal Organic Framework ZIF-8

Kang

Zhang

Wang

et al. 2021

Sensors

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“…Compared with the pristine monolayer MX 2 (M = Mo, W, or V and X = S, Se, or Te), MX 2 with defects shows an obviously lower |ΔG H |. For example, the |ΔG H | of the pristine VSe 2 is ~ 0.31 eV [30], whereas the |ΔG H | decreases to 0.15 eV when Se vacancies are introduced [27]. Given the relatively high catalytic activity of Pt and defective TMDs, it is an interesting question whether one can achieve better catalytic activity by combing the two materials.…”

Section: Introductionmentioning

confidence: 96%

“…TMDs are widely regarded as the ideal catalysts for hydrogen evolution reaction (HER) due to their large specific surface area and unique physicochemical properties [22][23][24][25][26]. However, catalytic activity of pristine TMDs is still lower than Pt and its alloys (the most efficient catalysts for HER so far) [27,28]. Defect engineering is one of the major strategies to enhance catalytic activity of TMDs for HER.…”

Section: Introductionmentioning

confidence: 99%

Line defects in monolayer TiSe2 with adsorption of Pt atoms potentially enable excellent catalytic activity

Song

et al. 2021

Nano Res.

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Two-dimensional (2D) materials with defects are desired for catalysis after the adsorption of monodispersed noble metal atoms. High-performance catalysts with the absolute value of Gibbs free energy (|ΔG H |) close to zero, is one of the ultimate goals in the catalytic field. Here, we report the formation of monolayer titanium selenide (TiSe 2 ) with line defects. The low-temperature scanning tunneling microscopy/spectroscopy (STM/S) measurements revealed the structure and electronic states of the line defect. Density functional theory (DFT) calculation results confirmed that the line defects were induced by selenium vacancies and the STM simulation was in good agreement with the experimental results. Further, DFT calculations show that monolayer TiSe 2 with line defects have good catalytic activity for hydrogen evolution reaction (HER). If the defects are decorated with single Pt atom, the HER catalytic activity will be enhanced dramatically (|ΔG H | = 0.006 eV), which is much better than Pt metal (|ΔG H | = 0.09 eV). Line defects in monolayer TiSe 2 /Au(111) provide a wonderful platform for the design of high-performance catalysts.

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“…However, their high cost, scarcity, and nondurability have limited the commercialization of renewable energy technologies . To achieve fast reaction kinetics and improved energy-transfer efficiency, highly efficient, cost-effective, and earth-abundant catalysts are required presenting lower overpotential values at higher current densities …”

Section: Introductionmentioning

confidence: 99%

“…12 To achieve fast reaction kinetics and improved energy-transfer efficiency, highly efficient, costeffective, and earth-abundant catalysts are required presenting lower overpotential values at higher current densities. 13 Newly emerging carbon nanomaterials are fascinating the researchers because of their abundance, adjustable molecular structures, exceptional electrical conductivities, and endurance to acidic/basic environments. 14,15 Despite the large carrier mobility (1.5 e 4 cm 2 V −1 s −1 ) of graphene-based carbon materials, the gapless nature (zero band gaps) limits its performance as a versatile electronic material.…”

Section: ■ Introductionmentioning

confidence: 99%

Graphene-Decorated Boron–Carbon–Nitride-Based Metal-Free Catalysts for an Enhanced Hydrogen Evolution Reaction

Liu

Ali

et al. 2021

ACS Appl. Energy Mater.

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The hydrogen evolution reaction (HER) is an emerging renewable energy source to derive clean, efficient, and high-energy-density hydrogen fuel from electrochemical water splitting mostly by using traditional noble-metal-based catalysts. However, their scarcity has led to the emergence of carbon-based materials which are exceptionally promising alternatives for the HER. Herein, graphene capsules-decorated boron–carbon–nitride sheets are developed by pyrolyzing a mixture of pyridine borane and custom-made GCs. The 3D hollow GCs effectively increase the surface area to supplement more exposed active sites for the hydrogen adsorption/desorption reaction. The carbon-rich ternary hybrid structure favors adjusting the electrical conductivity, which provides better HER catalytic performances (overpotential of 333 mV at 10 mA cm–2) in acidic conditions. The long-term stability for 24 h and the simplest designing technique propose an effective metal-free electrocatalyst for commercial applications in the renewable energy field.

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Large-scale preparation of 2D VSe2 through a defect-engineering approach for efficient hydrogen evolution reaction

Cited by 38 publications

References 59 publications

Ethanol Sensing Properties and First Principles Study of Au Supported on Mesoporous ZnO Derived from Metal Organic Framework ZIF-8

Ethanol Sensing Properties and First Principles Study of Au Supported on Mesoporous ZnO Derived from Metal Organic Framework ZIF-8

Line defects in monolayer TiSe2 with adsorption of Pt atoms potentially enable excellent catalytic activity

Graphene-Decorated Boron–Carbon–Nitride-Based Metal-Free Catalysts for an Enhanced Hydrogen Evolution Reaction

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