JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Xuanbing Wang,Junli Wang,Bohao Yu,Wenhao Jiang,Jinlong Wei,Buming Chen,Ruidong Xu,Linjing Yang
The oxygen evolution reaction kinetics in industrial zinc electrowinning is sluggish, resulting in low electrocatalytic activity and substantial energy expenditure (about one-third of energy was wasted due to the strong polarization effect). Herein, the paper described a core-shell structured MnCo 2 O 4.5 @C modified PbO 2 electrode through the pyrolysis and co-electrodeposition as a promising candidate for zinc electrowinning. As a result, the obtained Pb-0.2%Ag/ α -PbO 2 / β -PbO 2 -MnCo 2 O 4.5 @C composite electrode showed a sandwich-like structure, where Pb-0.2%Ag as a core, α -PbO 2 as a mid-layer, and β -PbO 2 -MnCo 2 O 4.5 @C served as an electrocatalytic layer. It also possessed improved OER catalytic activity , only required 680 mV to achieve a current density of 50 mA cm −2 and a Tafel slope of 216.04 mV dec −1 in an acidic solution containing 50 g L −1 Zn 2+ and 150 g L −1 H 2 SO 4 . The current efficiency increased by 0.7% and the cell voltage reduced by 360 mV as compared to a conventional Pb-0.76%Ag alloy electrode, leading to a remarkable energy-consumption reduction of 283.5 kW h for producing per ton metallic zinc. Furthermore, Pb-0.2%Ag/ α -PbO 2 / β -PbO 2 -MnCo 2 O 4.5 @C exhibited a prolonged service life, which worked about 44 h under an ultra-high current density of 2 A cm −2 . Hence, this paper provides the strategy to design and construct non-precious, high-performance catalyst for electrolysis and other applications.
研究领域:
材料科学
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电化学
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能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Yaoshan Li,Yuan Liu,Yuwei Cao,Huatai Wang,Kaitao Li,Yanjun Lin
In this study, the solubility of anhydrous magnesium sulfate (MgSO 4 ) in ethanol solutions with concentrations ranging from 10 % to 50 % was determined at 15–50 °C. Next, the results were correlated by using the Apelblat model, polynomial empirical equation, ideal solution equation of state model, and Van’t Hoff–Jouyban–Acree model. The results indicated that all four models exhibited correlation coefficients greater than 97 %, and average relative deviations of 3.82 %, 4.24 %, 3.96 %, and 3.96 %, respectively. Notably, the Apelblat model was found to be more accurate and reliable in correlating the solubility of MgSO 4 in ethanol solutions with different concentrations. Further, the Van’t Hoff equation was applied to determine the enthalpy and entropy of dissolution. Herein, a certain amount of anhydrous ethanol was added to the zinc (Zn) electrolytic waste solution (ZEWS) to crystallize Zn 2+ and Mg 2+ through the solvent crystallization method, with the precipitation rates reaching 20.13 % and 39.38 %, respectively. The concentration of Mg 2+ reduced to below 15 g⋅L −1 , meeting the quality standard of ZEWS. The XRD, TG, and SEM analyses of the output salt mix crystallization confirmed the primary components to be MgSO 4 ·7H 2 O and ZnSO 4 ·7H 2 O, with the morphological features primarily consisting of short rods and some crystal agglomerates. This study shows that the removal of Mg 2+ from Zn smelting process can be effectively achieved by the proposed solvent crystallization method.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Jianqiang Ye,Buming Chen,Jun Guo,Hui Huang,Yapeng He,Shixing Wang
High oxygen evolution overpotential and low corrosion resistance are regarded as the main drawbacks of anode materials in zinc electrowinning . To improve the electrocatalytic activity of oxygen evolution reactions (OER) and reduce energy consumption in zinc electrowinning, a Co 3 O 4 nanoparticle-modified PbO 2 anode was prepared on a Ti substrate with Sn-SbO X as an interlayer through pulse electrodeposition . The surface morphology, phase composition, and electrochemical properties of the as-prepared anode were systematically investigated. The introduction of Co 3 O 4 nanoparticles refined the crystal size of PbO 2 and increased the surface roughness of the anode. Electrochemical tests suggested the excellent electrocatalytic activity of the Co 3 O 4 nanoparticle-modified PbO 2 anode. Density functional theory (DFT) calculations revealed that Co 3 O 4 nanoparticles reduced the OER free energy (1.58 eV) and that pulse electrodeposition reduced the PbO 2 crystal size and increased the active surface area of the anode. In the simulated zinc electrowinning test, an improved current efficiency (90.6 %) was achieved, and the low energy consumption (2,508.29 kW·h) for zinc production per ton was significantly reduced as compared with that for the conventional Pb-0.75 %Ag anode. The lifetime of the modified electrode is increased by approximately 36.8 %. This provides a reference for the design and development of anode materials with high oxygen evolution activity and strong corrosion resistance in zinc electrowinning systems.
研究领域:
材料科学
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电化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
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IF 3.9
Huilong Jian,Xue Yi,Lu Yang,Shengtao Zhang,Hongru Li,Fang Gao
In this study, a low-cost and friendly compound diazolidinylurea carrying a number of heteroatoms and inter/intra hydrogen bonding, a derivative of urea (DU), efficiently strengthened aqueous zinc ions batteries (AZIBs) in ZnSO4 electrolyte. The influence of DU on the zinc anode in the 2 M ZnSO4 electrolyte was fully studied by various surface chemistry and electrochemistry means. It is demonstrated that the super low concentration of DU (2 mM, 0.00556 wt %) could inhibit the formation of zinc dendrites, zinc corrosion, and the hydrogen evolution reaction during the constant current cycling of water system ZIBs, which thus enabled symmetric zinc–zinc batteries to reach a cycle life of 7336 h (nearly 306 days) under 1 mA·cm–2, 1 mA h·cm–2 at 25 °C and 426 h (nearly 18 days) at 55 °C, and inspired zinc–manganese full battery to maintain a capacity retention rate of more than 52% after cycling for 1000 cycles under a current of 2 A·g–1. These results are much superior over zinc ion cells based on the blank ZnSO4 batteries. Even if the Zn–Cu half cells including the DU/2 M ZnSO4 electrolyte were also more pronounced than those with the bare ZnSO4 electrolyte. The maximum corrosion inhibition efficiency of the DU for the zinc electrode in ZnSO4 solution exceeded 82%. Hence, the suppression of zinc corrosion and parasitic side reactions, as well as the formation and growth of zinc dendritic crystals by the addition of DU in zinc sulfate electrolyte, played a central role in intensifying aqueous zinc ion batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 17
·10634-10645
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IF 4.036
Wenhao Jiang,Junli Wang,Xuanbing Wang,Jiang Liao,Jinlong Wei,Ruidong Xu,Linjing Yang
The conventional Pb–Ag alloy possesses a high oxygen evolution reaction overpotential, poor stability, and short service life in acidic solutions, making it an unsuitable sort of anode material for the zinc electrowinning process. Therefore, a layered carbon-covered cobalt tetroxide (Co3O4@C)-reinforced PbO2-coated electrode is fabricated via a facile two-step pyrolysis-oxidation and subsequent electrodeposition process. As a result, the reinforced PbO2-coated electrode exhibits a low OER overpotential of 517 mV at 500 A m−2 and a Tafel slope of 0.152 V per decade in a zinc electrowinning simulation solution (0.3 M ZnSO4 and 1.53 M H2SO4). The reduced overpotential of 431 mV at 500 A m−2 compared to traditional Pb–0.76%Ag alloy leads to improved energy savings, which is attributable to the presence of Co3O4@C to refine the grain size and thus increase the effective contact area. Moreover, the reinforced PbO2-coated electrode has a prolonged service life of 93 h at 20 000 A m−2 in 1.53 M H2SO4. Therefore, an accessible and efficient strategy for preparing a coated electrode to improve OER performance for zinc electrowinning is presented in this research.
研究领域:
材料科学
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电化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2023
·Vol. 170
·期 9
·097506
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IF 3.9
Ni Xiao,Yinan Chen,Wen Tan,Jiangang Ku,Qiang Wang,Hang Chen,Wei Weng,Shuiping Zhong
Real-time and rapid determination of trace copper ion (Cu2+) in the electrolyte of zinc smelting process is urgently needed. However, the complicated composition of the electrolyte, especially the extremely high-concentration of zinc ion (Zn2+) may cause severe interference to the detection of Cu2+. This work describes a facile electrochemical sensor for Cu2+ determination in the electrolyte of zinc smelting plants based on a fluorine-doped tin oxide (FTO) electrode with silver nanowires (AgNWs) and Nafion modification. The AgNWs/Nafion-FTO electrode showed good detection ability with the linear detection range of 0.2−2 mg l−1 Cu2+ in 45 g l−1 Zn2+ solution using differential pulse anodic stripping voltammetry (DPASV) technique. With DPASV technique, Cu2+ can be first reduced and pre-concentrated on the working electrode surface at −0.6 V vs Ag/AgCl for 500 s, after which the deposited Cu metal is oxidized around 0 V vs Ag/AgCl during the stripping step. It has been proved by transmission electron microscopy (TEM) and X-ray photoelectron spectra (XPS) that trace Cu2+ can be adsorbed and reduced on AgNWs in solutions with Zn/Cu ratio up to (2.25−22.5) × 104. The results extend AgNWs modified electrode to the industrial solution, providing a new strategy for detection of trace metal ions in industrial solutions.
研究领域:
分析化学
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材料科学
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2020
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IF 4.473
Yang Dong,Ming Jia,Yuanyuan Wang,Jianzhong Xu,Yongchang Liu,Lifang Jiao,Ning Zhang
Rechargeable aqueous zinc/vanadium pentoxide (Zn/V2O5) battery chemistry has recently attracted a great attention due to its high safety, material abundance, cost effectiveness, and desirable energy density. However, the reaction mechanism of V2O5 in an aqueous electrolyte remains a topic of discussion, and the limited life span resulting from the active materials dissolution hinders the further development of the Zn/V2O5 battery. Here, we report a long-life aqueous Zn/V2O5 battery using a simply ball-milled V2O5 cathode, a concentrated aqueous ZnSO4 electrolyte, and a metallic Zn anode. Electrochemical, structural, and spectroscopic analyses reveal that the V2O5 electrode experiences a highly reversible proton (H+) and Zn2+ co-intercalation mechanism in aqueous media, which differs from the conventional cognition that Zn2+ ion as the only charge carrier inserts into the V2O5 host. The electrolyte-involved (dis)appearance of zinc sulfate hydroxide on the electrodes’ surface caused by H+ (de)intercalation has also been clarified. In addition, the optimized 3 M ZnSO4 electrolyte can not only suppress the dissolution of the V2O5 cathode but also enhance the stability of the Zn anode, thereby enabling the stable operation of the Zn/V2O5 battery with a reversible capacity of 357 mAh g–1 after 2000 cycles without obvious decay at 2.0 A g–1. This work opens up frontiers in the mechanism insight and electrolyte formulation for aqueous Zn batteries.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2947-2958
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IF 2.8
Guan Pingping,Li Haobo,Zhang Xin,Shi Zhongning,Liu Aimin
Zinc is a commonly used corrosion-resistant coating for steel surface protection. In this study, the ethylene carbonate-zinc chloride (EC-ZnCl 2 ) electrolyte systems are selected for zinc electrodeposition, and their ionic structure and properties were studied. The corrosion resistance of the electrodeposited zinc coatings obtained from 4EC-ZnCl 2 , 3EC-ZnCl 2 , and 2EC-ZnCl 2 systems was analyzed. Raman spectroscopic analysis shows that these EC-ZnCl 2 systems contain [Zn 2 Cl 6 ] 2− species. The relationship between conductivity, viscosity, and density with the temperature of EC-ZnCl 2 systems was provided. Scanning electron microscopy (SEM) and potentiodynamic polarization curve (Tafel) tests showed that when the deposition was carried out at –1.0 V and –1.2 V (vs. Ag/AgCl) for two hours, a uniform zinc coating with good corrosion resistance could be obtained.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2024
·
IF 7.1
Guochao Wan,Wenhao Sun,Lei Liu,Changming Mao,Zhonghua Zhang,Xiaosong Guo,Guicun Li
Reducing the free radicals associated with electrochemical reactions and the activity of H2O is an effective measure to inhibit side reactions and improve stability for rechargeable aqueous Zn-ion batteries. Herein, methylsulfonylmethane (MSM), a popular dietary supplement for humans, is used as an innoxious and low-cost additive to scavenge free radicals and optimize the coordination condition for aqueous ZnSO4 electrolyte. Profiting from the double effects of MSM, the Zn∥Ti asymmetric cells exhibit excellent stability and display a high Coulombic efficiency (CE) of 99.5% in the aqueous MSM/ZnSO4 electrolyte for 1000 h, and the Zn∥Zn cells achieve a long cycle life of over 2000 h. In addition, MSM can effectively suppress the dissolution of an ammonium vanadate (NVO) cathode. The positive role of MSM is further exhibited in the Zn∥NVO and Zn∥PANI full cells, exhibiting outstanding charge/discharge performance and capacity retention. This work provides a type of innoxious additive for an aqueous electrolyte for aqueous rechargeable zinc-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Zhao Ruirui,Wang Haifeng,Du Haoran,Yang Ying,Gao Zhonghui,Qie Long,Huang Yunhui
Aqueous zinc batteries are appealing devices for cost-effective and environmentally sustainable energy storage. However, the zinc metal deposition at the anode strongly influences the battery cycle life and performance. To circumvent this issue, here we propose the use of lanthanum nitrate (La(NO 3 ) 3 ) as supporting salt for aqueous zinc sulfate (ZnSO 4 ) electrolyte solutions. Via physicochemical and electrochemical characterizations, we demonstrate that this peculiar electrolyte formulation weakens the electric double layer repulsive force, thus, favouring dense metallic zinc deposits and regulating the charge distribution at the zinc metal|electrolyte interface. When tested in Zn||VS 2 full coin cell configuration (with cathode mass loading of 16 mg cm −2 ), the electrolyte solution containing the lanthanum ions enables almost 1000 cycles at 1 A g −1 (after 5 activation cycles at 0.05 A g −1 ) with a stable discharge capacity of about 90 mAh g −1 and an average cell discharge voltage of ∼ 0.54 V.
研究领域:
电化学
·
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）