Microstructure and electrochemical hydrogenation/dehydrogenation performance of melt-spun La-doped Mg2Ni alloys

Hou, Xiaojiang; Hu, Rui; Zhang, Tiebang; Kou, Hongchao; Song, Wenjie; Li, Jinshan

doi:10.1016/j.matchar.2015.05.033

Cited by 30 publications

(5 citation statements)

References 56 publications

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“…Obviously, the value of E was related to the surface characteristics of the alloy electrode and the hydrogen diffusion rate. 53,54 Corrosion performance.-In alkaline solutions, the surfaces of the Mg-based alloys easily form oxide layers which affects charge transfer and reduces the dynamic performance. 55 To explain the effects of Zn doping and the melt-spinning process on the surface characteristics of the Mg 2 Ni 0.75 Zn 0.25 alloy particles, electrochemical impedance spectra (EIS) were generated.…”

Section: Desorption Kinetics-dehydrogenation Activation Energy-mentioning

confidence: 99%

Electrochemical Hydrogen Storage Kinetics and Microstructure of the Rapidly Quenched Alloy Mg₂Ni_0.75Zn_0.25

Hai

Liu

et al. 2023

J. Electrochem. Soc.

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Mg2Ni0.75Zn0.25 alloys are prepared from Mg2Ni as master alloy and pure Zinc ingot by remelting process. The microstructures, electrochemical properties, and desorption kinetics of the as-cast and melt-spun alloys are investigated. The phase compositions and microstructures of the alloys are investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and electron backscattering diffraction. The results show that the segregation atoms rich in Zn can inhibit the growth of Mg2Ni grains, especially the nanocrystalline grains formed in Mg2Ni0.75Zn0.25 alloy after melt-spinning. The rapidly quenched Mg2Ni0.75Zn0.25 alloy exhibits the largest discharge performance (102.1 mAh/g) and dehydrogenation activation energy (14.68 kJ/mol). The improvement of the kinetic properties is related to the hydrogen diffusion rate (D) in the alloys and the charge transfer reaction on the surface. The rapidly quenched Mg2Ni0.75Zn0.25 alloy has the largest D, 6.187×10-11 cm2/s. The doping of Zn aggravates the corrosion of alloy electrodes, which destroys the oxide layer on the alloy surface, provides a channel for the diffusion of hydrogen atoms.

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Section: Desorption Kinetics-dehydrogenation Activation Energy-mentioning

confidence: 99%

Electrochemical Hydrogen Storage Kinetics and Microstructure of the Rapidly Quenched Alloy Mg₂Ni_0.75Zn_0.25

Hai

Liu

et al. 2023

J. Electrochem. Soc.

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“…36 Zhang et al showed the preferable z E-mail: zyz1289@126.com; zhouyuanzhen@xauat.edu.cn discharge capacities and superior cycle stabilities of Mg 2 Ni alloys because of the incorporation of La result in the promotion of charge transfer. 37 La-doped ZnWO 4 nanocrystals improved the optical activity of ZnWO 4 . 38 These studies confirmed that La doping was able to enhance the catalytic and electrochemical properties of nanomaterials.…”

mentioning

confidence: 91%

Hydrothermal Method Prepared La-Doped ZnWO₄Nanospheres as Electrocatalytic Sensing Materials for Selective and Sensitive Determination of Dopamine and Uric Acid

Zhou

Yang

Zhu

et al. 2016

J. Electrochem. Soc.

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La-doped ZnWO 4 nanospheres were successfully synthesized by a hydrothermal synthesis method and further investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). A novel electrochemical sensor has been fabricated by carbon paste electrode (CPE) coated with the prepared La-doped ZnWO 4 nanospheres. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were applied to characterize the electrochemical properties of the sensor. By using DPV method, low detection limits of DA and UA were obtained to be 0.04 μmol • L −1 and 0.03 μmol • L −1 (S/N = 3), with the linear calibration curves over the concentration ranges of 0.10∼43.03 μmol • L −1 and 0.08∼106.65 μmol • L −1 , respectively. Furthermore, the sensor was employed to detect DA and UA with good selectivity and sensitivity, and the interference experiment as well as the practical sample analysis was also well performed.

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“…Alloying and high energy ball milling (HEBM) strategies are good choices to ameliorate the kinetics and conversion yields of hydrolysis H 2 generation for Mg-based alloys [28,29]. A small amount of favorable alloying elements such as Ni can modify the micromass transfer and electrochemical activity of the matrix alloy, thereby distinctly promoting the H 2 generation characteristics of Mg-based alloys [30,31]. The presence of the second phase (Mg 2 Ni) in the Mg-Ni alloy causes fast hydrogen generation rate from the hydrolysis of Mg in seawater [32].…”

Section: Graphic Abstract Introductionmentioning

confidence: 99%

Outstanding hydrogen production properties of surface catalysts promoted Mg–Ni–Ce composites at room temperature in simulated seawater

et al. 2020

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The as-cast magnesium-nickel-cerium (Mg-Ni-Ce) alloys with nominal component (Mg-10 wt% Ni) 1-x Ce x (x = 0, 5, 10, 15 wt%) are optimized by highenergy ball milling (HEBM). Expandable graphite (EG) and molybdenum disulfide (MoS 2 ) have been introduced as surface catalysis to form (Mg10Ni) 95 Ce 5 -5 wt% EG-5 wt% MoS 2 composite. The synergetic effects of HEBM and catalysts on H 2 production of (Mg10Ni) 95 Ce 5 are comprehensively studied. The thermodynamics are studied by H 2 generation curves fitting. The HEBM 0Ce, 5Ce, 10Ce and 15Ce alloys at 291 K can generate 530, 747, 720 and 487 mL g -1 H 2 with conversion yields of 59%, 87%, 89% and 64% in initial 15 min, respectively. The addition of surface catalysts EG-MoS 2 can further enhance the initial hydrogen generation rate and the final conversion yield within short period at room temperature. 773 mL g -1 H 2 corresponding to 95% conversion yield can be obtained by HEBM (Mg10Ni) 95 Ce 5 -EG-MoS 2 within 1 min at 291 K. The synergetic effects of HEBM and EG-MoS 2 can promote rapid initial generation rate and high conversion yield of hydrolysis hydrogen generation of (Mg10Ni) 95 Ce 5 -EG-MoS 2 composite. This work indicates a promising way to synthesize Mg-based alloys with rapid initial hydrolysis H 2 generation kinetics and high conversion yield within a short period.

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Microstructure and electrochemical hydrogenation/dehydrogenation performance of melt-spun La-doped Mg2Ni alloys

Cited by 30 publications

References 56 publications

Electrochemical Hydrogen Storage Kinetics and Microstructure of the Rapidly Quenched Alloy Mg₂Ni_0.75Zn_0.25

Electrochemical Hydrogen Storage Kinetics and Microstructure of the Rapidly Quenched Alloy Mg₂Ni_0.75Zn_0.25

Hydrothermal Method Prepared La-Doped ZnWO₄Nanospheres as Electrocatalytic Sensing Materials for Selective and Sensitive Determination of Dopamine and Uric Acid

Outstanding hydrogen production properties of surface catalysts promoted Mg–Ni–Ce composites at room temperature in simulated seawater

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Microstructure and electrochemical hydrogenation/dehydrogenation performance of melt-spun La-doped Mg2Ni alloys

Cited by 30 publications

References 56 publications

Electrochemical Hydrogen Storage Kinetics and Microstructure of the Rapidly Quenched Alloy Mg2Ni0.75Zn0.25

Electrochemical Hydrogen Storage Kinetics and Microstructure of the Rapidly Quenched Alloy Mg2Ni0.75Zn0.25

Hydrothermal Method Prepared La-Doped ZnWO4Nanospheres as Electrocatalytic Sensing Materials for Selective and Sensitive Determination of Dopamine and Uric Acid

Outstanding hydrogen production properties of surface catalysts promoted Mg–Ni–Ce composites at room temperature in simulated seawater

Contact Info

Product

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Electrochemical Hydrogen Storage Kinetics and Microstructure of the Rapidly Quenched Alloy Mg₂Ni_0.75Zn_0.25

Electrochemical Hydrogen Storage Kinetics and Microstructure of the Rapidly Quenched Alloy Mg₂Ni_0.75Zn_0.25

Hydrothermal Method Prepared La-Doped ZnWO₄Nanospheres as Electrocatalytic Sensing Materials for Selective and Sensitive Determination of Dopamine and Uric Acid