Journal of Sustainable Metallurgy
·
2021
·Vol. 7
·期 4
·1910-1916
·
IF 2.347
Li You-gang,Liu Shan-shan,Wang Chang-hong,Luo Tao,Xiang Chang-liu,Li Shuai,Chang Cong,Yang Sheng-hai,Wang Heng-hui,Chen Yong-ming
The lead (Pb) electro-refining in the green methanesulfonic acid (MSA) system presents an alternative route to the conventional fluosilicic-acid-based Pb electro-refining. Herein, we investigated the electro-deposition behavior of the MSA-based Pb electro-refining by electrochemical measurement and apparent characterization techniques. The operational principle of the Pb deposition was preliminarily understood by performing cyclic voltammetry (CV) complemented with SEM–EDS detection. The results indicated the thermodynamic priority of the efficient Pb 2+ /Pb reduction reaction over the H + /H 2 one. The impact of various factors such as MSA concentration, scanning rate, and temperature on the effectiveness of Pb electro-deposition were investigated by linear sweep voltammetry and electrochemical impedance spectroscopy. Further numeric calculation and model analysis helped acquire in-depth kinetics and mechanism knowledge, such as the discharge form of divalent Pb(II), reversibility of the electrode process, apparent activation energy, reaction order and deposition reaction kinetics. Overall, this work revealed important electrochemical mechanism, principle, and kinetics of the Pb deposition in the MSA-based electro-refining process and would offer a significant guidance in condition optimization of its practice. Graphical Abstract
研究领域:
电化学
·
冶金工程
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材料科学
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绿色化学
·
应用化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Wenxia Hou,Yi Li,Shuting Xu,Qian Wang,Kuntong Song,Junhong Liu,Nan Wang,Qing Zhou,Dongxia Yan,Xingmei Lu
The usage of zinc-containing catalysts in glycolysis causes the residue of Zn 2+ in the polyethylene terephthalate (PET) degradation monomer bis-hydroxyethyl (BHET), which limits the high-value utilization of BHET. This work first used electrodeposition combined with one-time recrystallization to purify BHET. Electrodeposition was suitable for dealing the Zn 2+ concentrations of degradation solutions within 50–100 ppm, and decreased the content of Zn 2+ in BHET from 141.30 to 2.41 ppm, which reached the standard of repolymerization into PET bottles. The removal rate of Zn 2+ was 90 % for the degradation solutions, which decreased the concentration of Zn 2+ in wastewater from 100 to 8.97 ppm. Meanwhile, the Zn 2+ removed from the degradation solutions was deposited on cathode, which obtained metal Zn materials and realized the recycling of Zn resources from Zn(OAc) 2 . Therefore, electrodeposition could realize the purification of BHET, recycling of Zn(OAc) 2 , reducing the environmental pollution caused by the emission of Zn 2+ and the protection of human health, simultaneously. Electrodeposition had less water consumption, lower loss rate of BHET (from 60 % to 10 %) and shorter processing time, compared with six-times recrystallizations. This study first proposed the formation of quadridentate between BHET and Zn 2+ , and put forward a new three-steps electrodeposition mechanism of Zn 2+ : the addition of electric field destroyed the dissociation equilibrium of quadridentate and made it shift to release free Zn 2+ ; the free Zn 2+ gathered to form ionic groups and they migrated to copper; Zn 2+ reduced on copper, of which the first step was the speed limited step.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Peicheng Wei,Yan Wen,Kaifeng Lin,Xin Li
Developing novel photoanodes with high efficiency for photoelectrochemical (PEC) water splitting has become the key to solar energy conversion and storage realm. Herein, 3D worm-like bismuth vanadate (BiVO 4 ) is grafted on 2D thin tungsten trioxide (WO 3 ) underlayer by electrodeposition to form mixed–dimensional structured photoanode, resulting in significant improvement of the photocatalytic performance and the charge separation efficiency. Characterization results prove that the mixed–dimensional structured can boost the photocatalytic activity by suppressing back reaction and charge recombination of the bulk BiVO 4 . Simultaneously, the electrical conductivity of photoanode can be increased by W 6+ doping. Furthermore, a robust catalyst NiCo 2 O x is coated onto the surface of WO 3 /BiVO 4 photoanode, exhibiting a desirable photocurrent of 3.85 mA cm −2 at 1.23 V vs . RHE and an excellent stability over 3 h. Both the excellent photocurrent density and great operational stability of this 2D/3D WO 3 /BiVO 4 photoanode make it a promising material for practical applications.
研究领域:
材料科学
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能源转换与存储
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DOI
高影响因子
ELECTROANALYSIS
·
2014
·Vol. 26
·期 4
·856-863
·
IF 2.502
Jiuyang Wu,Yuqing Miao,Xiaocai Liang,Zhuoyuan Yang,Yang Yang,Ruizhuo Ouyang
Metallic Bi and Ni were co-deposited onto the surface of glass carbon electrode (GCE) from the electrolyte solution containing their respective nitrate to fabricate a Bi/Ni alloy modified GCE (Bi/Ni-GCE). The purpose is to study the influence of Bi 3+ on the deposition of Ni and that of deposited Bi on the electrocatalytic performance of Ni to glucose in alkali solution. The results show that both redox signal of Ni(OH) 2 /NiOOH and Ni(OH) 2 /NiOOH mediated electrocatalysis to glucose is remarkably increased in the presence of Bi. It seems that there is a synergistic effect between Bi and Ni on each other’s redox electrochemistry. It’s possible that the firstly deposited Bi on GCE surface helps to the following nucleation and growth of Ni, leading to the deposition of more metallic Ni on GCE surface. An extremely attractive feature of Bi/Ni-GCE is reflected by the fast response time to the electrocatalytic oxidation of glucose. The electrode nearly responses immediately after glucose is added and it reaches a steady-state level within only 2 seconds, demonstrating a good electrocatalytic property of Bi/Ni-GCE. The calibration plot is linear over the wide concentration range of 0–5.8 mM with a sensitivity of 33.96 µA/mM and a correlation coefficient of 0.9985. The detection limit of the glucose was found to be 0.59 µM at a signal-to-noise ratio of 3. The fabricated Bi/Ni-GCE was successfully employed to analyze the glucose level in blood samples, exhibiting high accuracy, strong resistance against inference and good reliability in the practical applications.
研究领域:
电化学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 15
·D882
·
IF 3.12
Da-Wei Yang,Ke-Ke Chang,Xiao-Fei Hu,Ya-Lan Liu,Tai-Qi Yin,Shi-Lin Jiang,Mei Li,Wei Han,Zhi-Fang Chai,Wei-Qun Shi
The objective of this work is to explore the electrochemical and electrodeposition behaviors of Eu (III) cation at the liquid binary Al-Ga alloy cathode. In addition, the co-reduction behaviors of Eu (III), Al (III) and Ga (III) were also systematically studied on a W electrode. The results indicated that Eu (III) can be reduced on the binary Al-Ga alloy cathode, and Eu (III), Al (III) and Ga (III) also can be co-reduced on the W electrode to form Al-Eu/Ga-Eu intermetallic compounds. At the same time, the isothermal section phase diagram of the Al-Ga-Eu ternary system at 773 K was also calculated. In addition, Al-Eu and Ga-Eu alloys were prepared by potentiostatic and galvanostatic electrolyses in the LiCl-KCl-EuCl3 melt. Finally, the electrodeposition products were characterized by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS).
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2018
·Vol. 22
·期 8
·2569-2577
·
IF 2.509
Li Liu-Ping,Liu Min,Zhang Wei-De
In this study, CdS/BiVO 4 heterojunction was successfully synthesized on the FTO-coated glass substrate through electrodeposition annealing followed by the second electrodeposition. First, the BiVO 4 films were prepared by electrodepositing nanoporous BiOI, and then, it was converted to BiVO 4 via annealing. Then, CdS was electrodeposited onto the BiVO 4 /FTO electrode. The obtained CdS/BiVO 4 heterojunction shows higher photoelectrochemical (PEC) performance and higher stability for PEC water splitting than the blank BiVO 4 films. The maximum photocurrent density of 6.6 mA cm −2 at 0.4 V vs Ag/AgCl was obtained for CdS/BiVO 4 /FTO, which is 4.2 times of that of the blank BiVO 4 /FTO (1.6 mA cm −2 ). The enhancement mechanism of the CdS/BiVO 4 /FTO heterojunction was investigated. The CdS achieves the efficient visible light absorption and forms heterostructure with BiVO 4 , which promotes the separation efficiency of photogenerated electron-hole pairs in BiVO 4 to enhance PEC performance of CdS/BiVO 4 heterojunction.
研究领域:
材料科学
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能源科学
·
光催化
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DOI
高影响因子
Energies
·
2024
·Vol. 17
·期 2
·406
·
IF 3
Musa Abubakar Bilya,Aleksey Nabok,Yashodhan P. Purandare,Ashfaque E. Alam,I. M. Dharmadasa
In this study, a two-electrode electrodeposition technique was employed to grow thin films of antimony selenide (Sb2Se3) on glass/fluorine-doped tin oxide (FTO) substrates. The highest quality thin films were consistently obtained within the range of 1600 mV to 1950 mV. Subsequent electrodeposition experiments were conducted at discrete voltages to produce various layers of thin films. Photoelectrochemical cell (PEC) measurements were performed to characterize the semiconductor material layers, leading to the identification of both p-Type and n-Type conductivity types. Optical absorption spectroscopic analysis revealed energy bandgap values ranging from 1.10 eV to 1.90 eV for AD-deposited Sb2Se3samples and 1.08 eV to 1.68 eV for heat-treated Sb2Se3samples, confirming the semiconducting nature of the Sb2Se3material. Additionally, other characterization techniques, including X-ray diffraction analysis, reveal that the AD-deposited layers are almost amorphous, and heat treatment shows that the material is within the orthorhombic crystalline system. Heat-treated layers grown at ~1740 mV showed highly crystalline material with a bandgap nearing the bulk bandgap of Sb2Se3. Raman spectroscopy identified vibrational modes specific to the Sb2Se3phase, further confirming its crystallinity. To explore the thin-film morphology, Scanning Electron Microscopy (SEM) was employed, revealing uniformly deposited material composed of grains of varying sizes at different voltages. Energy Dispersive X-ray analysis (EDX) confirmed the presence of antimony and selenium in the material layers.
研究领域:
材料科学
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半导体物理
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太阳能电池
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 12
·122503
·
IF 3.1
Yanhong Jia,Hong Zhang,Ahmet Burak Çubuk,Biao Wu,Shaoqiang Guo
A mesh-type assembly and stirrer assembly were developed to improve the performance of liquid cadmium cathodes for the electrodeposition of U and Ce from LiCl-KCl molten salt at 773 K. The thermodynamic basis for electrodepositing U and Ce was established through the calculation of equilibrium potentials and cyclic voltammograms, while also examining the co-deposition of Li. Thereafter, U and Ce electrodeposition was performed by galvanostatic electrolysis, and the current efficiency was determined. It was found that both assemblies effectively hampered the growth of U dendrites and Ce-Cd dendritic alloys. However, the utilization of the mesh-type assembly resulted in a greater current efficiency for U, with the maximum deposited amount attaining 7.7 wt% U/Cd without causing U dendrites formation. In contrast, the current efficiency for Ce was enhanced after using the stirrer assembly due to an improved diffusion flux of Ce ions. Finally, cathode deposits were characterized by scanning electron microscopy, energy-dispersive spectroscopy, and X-ray diffraction, which revealed that disrupted fine U dendrites were randomly scattered in the Cd bulk, and that the CeCd11 dendritic alloys were also damaged, leading to an increased atomic ratio of Ce to Cd at the Cd bottom.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 10
·7031-7039
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IF 3.9
Pei Wu,Liqin Wang,Jinrui Wang,Junhan Luo,Yuexiang Lu,Xiaopeng Song,Jilian Liu,Yongquan Qin,Liudong Hou,Jing Ma
This study focuses on the recovery of UO2 from oxide spent fuel using electrodeposition. U3O8 was used as the initial material and dissolved in NaCl–2CsCl using NH4Cl at high temperatures by means of chlorination reaction. The electrolysis process was conducted using a three-electrode system to investigate the effects of cathode material and diameter, electrolysis temperature, electrolysis time, electrolysis voltage, and uranium concentration in the molten salt on the electrolysis reaction. By optimizing the electrolysis conditions, pure UO2 with a recovery efficiency of 97% was obtained, and the products were characterized using XRD, SEM-EDS, ICP-AES and XPS. It was found that within the scope of this experiment, increasing the cathode diameter, extending the electrolysis time, and increasing the reduction voltage appropriately all led to an improvement in the recovery efficiency of the electrolysis reaction, while other conditions had minimal effect on the reaction. Furthermore, doping of the electrolyte system was performed by adding La, Ce and Nd elements, while the removal of La showed good purification effects, with a maximum decontamination factor of 119. Furthermore, the system showed good purification effects for Nd, with a decontamination factor of 57.
研究领域:
材料科学
·
核能工程
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产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2021
·Vol. 8
·期 11
·2101-2107
·
IF 4.59
Ying Wang,Ran Du,Jinjie Qian,Yue Hu
Graphical Standing tall : Herein, a type of hierarchically ultra-fine CoP attached onto nanostructured CuO nanowire flowers (CuO NWF-CoP/CF) has been conveniently obtained by electrodeposition method, which exhibits outstanding oxygen evolution reaction activity with a small overpotential of 230 mV to achieve a current density of 50 mA cm −2 in 1.0 M KOH together with a satisfying long-term stability. The facile fabrication of high-performance and low-cost photo-/electro-catalysts for oxygen evolution reaction (OER) still presents a tough challenge. Herein, a type of hierarchically ultra-fine CoP attached to CuO nanowire flowers (CuO NWF-CoP/CF) has been obtained by a simple electrodeposition method. Due to the merits of the 3D hierarchical structure with large surface areas, rich active sites, and open-channels for effective gas diffusion, as-achieved CuO NWF-CoP/CF catalysts exhibit outstanding OER activity with an overpotential of 230 mV for OER to achieve a current density of 50 mA cm −2 in alkaline media. This work provides a novel method to prepare hierarchical self-supported electrocatalyst towards efficient water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Xianli Huang,Dongmei Zhuang,Zhihui Chen,Hao Gong,Tao Wang,Jianping He,Xiaogang Zhang
It is so far an efficient way for depressing dendrite growth to adjust the electrolyte composition . Therefore, we study the electrochemical behavior of lithium metal electrodeposited in a LiPF 6 -propylene carbonate (PC) electrolyte by adding two kinds of crown ether . The effect of crown ether concentration on the Coulombic efficiency of lithium electrodes has be evaluated, and the electrodeposition behavior of lithium metal on negative electrode has be analyzed by cyclic voltammetric curve, electrodeposition curve and lithium metal deposition morphology. The results show that a certain amount of crown ether (15-crown-5 and 12-crown-4) can preferentially coordinate with lithium ion in the electrolyte and form complex compounds, which reduce the lithium ions concentration in the “hot spot” and level the lithium electrode greatly by inhibiting the preferential growth of lithium dendrite . A uniform and dense nano-columnar lithium layer could be obtained at the current density of 2.0 mA cm −2 when the deposition amount is 1.0 mAh cm −2 , and the concentration of 15-crown-5 and 12-crown-4 ether are 0.3 M and 0.2 M, respectively. Gaussian calculation results show that the lithium-crown complex has a relatively lower lowest unoccupied molecular orbit (LUMO), where electrons could be injected during the charging process, leading to decreased Coulumbic efficiency.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2022
·Vol. 12
·期 3
·366
·
IF 3.236
Shengping Zhang,Chen Yu,Jingyi Tan,Yuxin Wang,Zhen He
In this study, Ti/SnO2-Sb2Ox-TiO2electrodes were produced using a sol-enhanced electrodeposition technique from methanesulfonate electrolytes. The surface microstructures of Ti/SnO2-Sb2Ox-TiO2were observed, and their phase constituents were determined. The surface features were analyzed by X-ray photoelectron spectroscopy. Linear sweep voltammetry and degradation tests were also conducted to determine the degradation performance. The results show that the addition of TiO2sol affects the microstructures of Ti/SnO2-Sb2Ox-TiO2electrodes, while a uniform coating surface can be obtained at a proper sol concentration in electrolytes. Adding TiO2sol also causes deep oxidation of Sb and generates more adsorbed oxygen on the electrode surface. The favorable surface features and the well-dispersed TiO2in the coatings of 10 mL/L TiO2modified Ti/SnO2-Sb2Ox-TiO2electrodes award them the best electrocatalytic performance, and their uniform coating surface prolongs the electrode service life.Keywords:SnO2-Sb2Ox;sol-enhanced electrodeposition;organic degradation
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）