JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Wenlan Ji,Yuanjie Xiong,Yuan Wang,Tian C. Zhang,Shaojun Yuan
Dealing with arsenic pollution has been of great concern owing to inherent toxicity of As(III) to environments and human health. Herein, a novel multilayered SnO 2 /PPy/ β -PbO 2 structure on TiO 2 nanotube arrays (TNAs/SnO 2 /PPy/ β -PbO 2 ) was synthesized by a multi-step electrodeposition process as an efficient electrocatalyst for As(III) oxidation in aqueous solution. Such TNAs/SnO 2 /PPy/ β -PbO 2 electrode exhibited a higher charge transfer, tolerable stability, and high oxygen evolution potential (OEP). The intriguing structure with a SnO 2 , PPy , and β -PbO 2 active layers provided a larger electrochemical active area for electrocatalytic As(III) oxidation. The as-synthesized TNAs/SnO 2 /PPy/ β -PbO 2 anode achieved drastically enhanced As(Ⅲ) conversion efficiency of 90.72% compared to that of TNAs/ β -PbO 2 at circa 45.4%. The active species involved in the electrocatalytic oxidation process included superoxide radical (•O 2 − ), sulfuric acid root radicals (•SO 4 − ), and hydroxyl radicals (•OH). This work offers a new strategy to construct a high-efficiency electrode to meet the requirements of favorable electrocatalytic oxidation properties, good stability, and high electrocatalytic activity for As(III) transformation to As(V).
研究领域:
环境科学
·
材料科学
·
电化学
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DOI
PubMed
高影响因子
Materials
·
2026
·Vol. 19
·期 7
·1370
·
IF 3.7
Yi Luo,Nan Li,Lingjing Yang,Jinlong Wei,Yuantao Yang,Wentao Wang,Yang Zhao,Ruidong Xu,Xuanbing Wang
The high energy consumption of lead anodes in zinc production is caused by the slow oxygen evolution reaction (OER). We made a La-Mn co-doped β-PbO2anode using electrodeposition to solve this issue. The XRD and XPS results show that adding La shrinks the lattice and changes the electron structure. This helps Mn4+change into active Mn3+and creates more active oxygen on the surface, making the reaction easier. EIS tests show that the charge transfer resistance (Rct) decreased by 4.2 times, decreasing from 147.6 Ω to 34.72 Ω at 1.0 V. The Bode phase peak also moved to a lower frequency (from 122 Hz to 0.215 Hz), proving that the electrochemically active surface area (ECSA) increased significantly. At the industrial current of 50 mA cm−2, the anode shows a low overpotential of 840 mV and a Tafel slope of 265 mV dec−1. This improved performance saves 187.10 kWh of energy per ton of zinc. Therefore, the LaMn-β-PbO2anode is a promising and energy-saving option for industrial zinc production.
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2017
·
IF 4.208
Yapeng He,Xue Wang,Weimin Huang,Rongling Chen,Wenli Zhang,Hongdong Li,Haibo Lin
A hydrophobic networked PbO 2 electrode was deposited on mesh titanium substrate and utilized for the electrochemical elimination towards paracetamol drug. Three dimensional growth mechanism of PbO 2 layer provided more loading capacity of active materials and network structure greatly reduced the mass transfer for the electrochemical degradation. The active electrochemical surface area based on voltammetric charge quantity of networked PbO 2 electrode is about 2.1 times for traditional PbO 2 electrode while lower charge transfer resistance (6.78 Ω cm 2 ) could be achieved on networked PbO 2 electrode. The electrochemical incineration kinetics of paracetamol drug followed a pseudo first-order behavior and the corresponding rate constant were 0.354, 0.658 and 0.880 h −1 for traditional, networked PbO 2 and boron doped diamond electrode. Higher electrochemical elimination kinetics could be achieved on networked PbO 2 electrode and the performance can be equal to boron doped diamond electrode in result. Based on the quantification of reactive oxidants (hydroxyl radicals), the utilization rate of hydroxyl radicals could reach as high as 90% on networked PbO 2 electrode. The enhancement of excellent electrochemical oxidation capacity towards paracetamol drug was related to the properties of higher loading capacity, enhanced mass transfer and hydrophobic surface . The possible degradation mechanism and pathway of paracetamol on networked PbO 2 electrode were proposed in details accordingly based on the intermediate products.
研究领域:
环境化学
·
电化学
·
水处理技术
·
材料科学
·
污染物降解
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 10
·2593-2606
·
IF 2.5
Li Er-Mei,Zhu Li,Li Chao-Xiong,Shi Ling-Jun,Li Bing,Li Fang,Deng Ning,He Jian-Bo
Stannous sulfate is commonly used as an additive in the positive lead pastes of lead-acid batteries, but its real function and mechanism are still vague and need further study. The present work investigates the intrinsic effects of tin additives on the positive electrode performance under well-controlled experimental conditions. The tin additives are added in three ways: the SnSO 4 dissolved in 4.5 M H 2 SO 4 electrolyte, the metal Sn melted in metal Pb substrate, and the SnSO 4 mixed in homemade industrial lead pastes. A series of evolutions are clearly revealed in structure, composition, and redox activity of the positive active materials with the content of Sn. Both the SnSO 4 in the electrolyte and in the positive lead pastes have a significant inhibiting effect on the transformation between PbSO 4 and PbO 2 , leading to a decrease in the charge/discharge capacities with increasing content of SnSO 4 . A similar but weaker inhibiting effect was also found for the Sn melted in the Pb-Sn alloys. The SnSO 4 has a significant enhancement effect on the grain size of PbSO 4 /PbO 2 , which increases the resistance of the solid-phase transformation deep inside the grains during the charge/discharge. All these results do not support the use of SnSO 4 in the positive pastes of lead-acid batteries. Graphical abstract
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 ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Xu Yang,Hu Changyi,Zhou Shenggang,Han Zhaohui,Chen Binbin,Xiao Bei
Anode material is critical for zinc electrowinning, and the selection and preparation of electrode materials are a focal point in hydrometallurgical research. In the present work, an Al/TiB 2 -Ti 4 O 7 /PbO 2 composite anode was fabricated through a combination of plasma spraying and electrodeposition. The morphology and structure of the TiB 2 -Ti 4 O 7 middle layer and PbO 2 active layer were investigated by scanning electron microscopy and x-ray diffraction. Linear sweep voltammetry, Tafel polarization curves, and electrochemical impedance spectroscopy were used to analyze the catalytic activity and corrosion resistance of the composite anode. COMSOL Multiphysics software was used to simulate the electric field distribution of each element in the electrowinning cell. The results demonstrated that a dense and uniform layered structure, along with robust interfacial bonding, was essential for minimizing the interface resistivity and enhancing the corrosion resistance of the Al/TiB 2 -Ti 4 O 7 matrix. The coating optimized at a current of 630 A exhibited superior conductivity and corrosion resistance, with excellent conductivity and current uniformity reducing the internal transmission resistance. In addition, it was observed that a low current density was not favorable for grain nucleation and deposition, whereas a high current density led to structural looseness and high inner stress. The electrochemical behavior of the Al/TiB 2 -Ti 4 O 7 /PbO 2 composite anode was better than that of the Pb-Ag anode, offering lower cell voltage, higher current efficiency, and lower power consumption under identical zinc electrowinning conditions. The electric field analysis indicated that the composite anode provided a more uniform distribution of electric flux line and current density, more negative cathodic overpotential, and a higher zinc deposition rate than the Pb-Ag anode. Graphical
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DOI
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Qiuyang Yu,Ziyi Jiang,Jinlong Yin,Shengli Chen,Xiaohong Hu
Because of its metal-like conductivity, excellent catalytic activity, and acid resistance, lead dioxide (PbO2) is the most used electrocatalyst for the practical electrochemical ozone production (EOP) technique. Introducing fluorine (F) into PbO2 electrodes or electrolytes can significantly improve EOP activity. However, there is still lack of valid evidence on understanding the role of doping F in the PbO2 electrode. In this work, we report a comprehensive study on the effect of F on EOP activity on electrochemically prepared PbO2 electrodes. F doping suppresses the side reaction of dioxygen (O2) evolution by inhibiting the formation of an α phase impurity of PbO2 electrodes. The more hydrophobic surfaces by doping F promote O2 adsorption as evidenced by low-temperature O2-temperature-programmed desorption experiments and thus are more favorable for ozone (O3) generation. The in situ isotope labeling oxygen (18O2) experiment proves that at room temperature, O2 can adsorb and dissociate on the operando PbO2 electrode surface and participate in the formation of O3 molecules. This work provides a comprehensive understanding of doping F for enhanced EOP.
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 Water Process Engineering
·
2023
·
IF 7
Jiaqi Wei,Yuanyuan Zhang,Jinxing Ma,Shanshan Wang,Minmin Jiang,Qiaoyan Wei,Mei Chen,Xiaowu Huang,Haixiang Li,Xuehong Zhang,Junjian Zheng
Degradation of refractory organics has been limited by their low mass-transport rates in conventional flow-by operated electrochemical reactors. This study explores for the first time the development of porous titanium (Ti)-based metal oxide anodic membrane for efficient flow-through degradation of recalcitrant tetrabromobisphenol A (TBBPA). For this purpose, a duplexed Ti/SnO 2 -Sb/PbO 2 -Ce anodic membrane was successfully prepared by sol-gel and electrodeposition methods. Ti/SnO 2 -Sb/PbO 2 -Ce exhibited improved mechanical and electrochemical stability, larger electrochemical surface area, higher oxygen evolution potential and lower charge transfer resistance, as compared to its mono-layered rival (Ti/SnO 2 -Sb). The switching from flow-by to flow-through operation resulted in an increased mass transfer rate constant and narrowed diffusion layer thickness of Ti/SnO 2 -Sb/PbO 2 -Ce. In the flow-through mode, Ti/SnO 2 -Sb/PbO 2 -Ce enabled the complete TBBPA removal at a relatively low electric energy (0.11 kWh m −3 ). The TBBPA removal was ascribed to the direct anodic oxidation and indirect anodic oxidation incurred by absorbed HO , free HO and 1 O 2 . The intermediate products, which were arisen from the attack of TBBPA by these reactive species, were identified. We further estimated their acute toxicities and bioaccumulation factors. This research proposed a robust electrochemical filtration approach for detoxification of TBBPA-contaminated water.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Boxuan Yang,Yuxin Zeng,Tao Guo,Yuanzhong Lin,Lifeng Yin,Qingsong Hua
Hexafluoropropylene oxide dimer acid (HFPO-DA), an emerging persistent pollutant, has been prevalently utilized as an alternative to perfluorooctanoic acid (PFOA). Analogous to PFOA, HFPO − DA presents remarkable resistance against degradation by conventional technologies. In this study, we prepared Ce doped PbO 2 anode (Ce-PbO 2 ) and paired it with cathode to form redox system for the degradation of HFPO-DA in water. The results showed that the degradation rate of HFPO-DA over Ce-PbO 2 was as high as 1.67 × 10 −2 min −1 , much higher than that of Boron-doped diamond electrode (BDD, 6.84 × 10 –3 min −1 ). The Ce-PbO 2 anode also has the theoretical lifetime as high as 82.7 years. Free radical quenching experiments indicated that both reactive oxygen species (ROS) and reductive radicals contributed to the degradation of HFPO-DA. These degradation reactions start from a direct electron transfer, followed by electroreduction and a series of free radical reactions including decarboxylation, ether bond cleavage, and the “4A” processes (generation of Alkyl radicals, Alcohols, Acyl fluorides, and Acids in sequence) until it is decomposed into small molecules. Meanwhile, new intermediates (CF 3 CF 2 CF 2 OCF 3 CH•) generated by cathodic H• are dominating the reductive reaction during the electrochemical process. This “buttering bread on both sides” redox mechanism deepens the understanding of the degradation process of HFPO-DA and provides an efficient treatment strategy.
研究领域:
环境科学
·
电化学
·
污染治理
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2020
·
IF 4.608
Pin Lv,Putao Zhang,Zeng Chen,Shaokang Dong,Meiyue Liu,Jiping Ma,Junhao Cai,Fuhao Sun,Shengjun Li
All-inorganic perovskites have attracted intense interest as light-absorbing materials, due to their large absorption coefficient, long charge carrier and diffusion length. However, it is a challenge to obtain the large-area synthesis of high-quality uniform perovskites layers. Here we demonstrate the applicability of the electrodeposition technique for the large-area fabricating of all-inorganic perovskite layers. PbO 2 films were firstly electrodeposited on c-TiO 2 /m-TiO 2 /FTO substrate, which is then converted to PbI 2 and CsPbI 2−x Br 1+x sequentially. By optimizing the preparation process, we have obtained a large area and high-quality CsPbI 2−x Br 1+x perovskite thin film, which exhibited strong UV–visible light absorption. Moreover, adding an appropriate amount of DMF solution to the CsBr-methanol solution can promote the reaction between CsBr and PbI 2 , could increase the grain size of the perovskite grain and could improve the density of the perovskite film. A power conversion efficiency of 6.87% is obtained for small cells (0.25 cm 2 ) and 2.84% for large size cells (1.5 cm 2 ) using the c-TiO 2 /m-TiO 2 /CsPbI 2−x Br 1+x /Carbon structure.
研究领域:
材料科学
·
光伏技术
·
电化学
·
薄膜技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Tianyang Liu,Junli Wang,Xuanbing Wang,Jinlong Wei,Xiaoning Tong,Shengyou Su,Ju Zhang,Yuantao Yang,Ruidong Xu,Linjing Yang
The traditional Pb-Ag anodes used in zinc electrowinning exhibit high overpotential for oxygen evolution reaction (OER) and poor mechanical strength, leading to high energy consumption. To overcome the shortcomings, Ti/SnO 2 -Sb 2 O 4 /PbO 2 -La-doped MnCo 2 O 4.5 composite anode was prepared by this work. It demonstrated enhanced electrochemical performance, requiring 565 mV to reach the benchmark current density of 50 mA cm −2 , and the Tafel slop of 179.79 mV dec –1 in the acidic media containing 50 g L –1 Zn 2+ and 150 g L –1 H 2 SO 4 . According to the results of XPS, the content of Mn 4+ and Co 3+ increased, which was beneficial to promote the OER catalytic activity of the electrode. The current efficiency was improved by 1.7 % compared with traditional Pb-0.76 % Ag anode, resulting in a significant reduction in energy consumption of 477.46 kW∙h for producing one ton of zinc. Moreover, the Ti/SnO 2 -Sb 2 O 4 /PbO 2 -La-doped MnCo 2 O 4.5 anode showed excellent corrosion resistance, and the accelerated service time was extended to 50 h at 2 A cm −2 . The service life of the electrode was extended thanks to the introduction of the intermediate layer and La-doped MnCo 2 O 4.5 powder. Therefore, this work provided a novel strategy to prepare the anodes with enhanced electrochemical performance applied in zinc electrowinning and other aspects.
研究领域:
材料科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 17
·期 11
·221121
·
IF 1.5
Hao Li,Yiqi Du,Xiaolan Shen,Xinmou Kuang,Jiayi Zhu,Hairong Wang
The comparative electrochemical oxidation efficiency of bisphenol A (BPA) was explored using boron doped diamond (BDD), PbO 2 , and IrO 2 anodes. Several parameters were optimized using the BDD anode. The optimal conditions were a current density of 60 mA·cm −2 , Na 2 SO 4 concentration of 4 g·L −1 , agitation rate of 600 rpm, and BPA concentration of 50 mg·L −1 . The BPA removal efficiencies for the BDD, PbO 2 , and IrO 2 anodes were 100%, 79.9%, and 19.5%, respectively; only the BDD anode showed complete BPA removal. Similarly, the COD removal efficiencies with the BDD, PbO 2 , and IrO 2 anodes were 81.8%, 37.0%, and 6.73%, respectively. Oxidation with the BDD anode was realized mainly by •OH, accounting for approximately 85.6%. In addition, SO 4 · – oxidation and direct oxidation accounted for approximately 7.7% and 6.7%, respectively. In the PbO 2 anode, •OH oxidation, SO4· – oxidation, and direct oxidation accounted for approximately 51.0%, 8.2%, and 40.8%, respectively. In the IrO 2 anode, oxidation was dependent mainly on direct oxidation, and no •OH and SO 4 · – were generated.
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Jiaxin Li,Mo Li,Da Li,Qinxue Wen,Zhiqiang Chen
Coal gasification wastewater (CGW) contains a large amount of toxic pollutants , which seriously affects the subsequent biochemical treatment. In order to investigate the efficiency of electrocatalytic oxidation on pretreatment of CGW, lead dioxide electrodes doped with PEG and Bi were successfully prepared. Scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction were comprehensively used to characterize the lead dioxide electrode and the electrochemical performance was also tested by linear sweep voltammetry curve, cyclic voltammetry curve and AC impedance. Biodegradability and toxicity of CGW were evaluated by dehydrogenase activity and acute toxicity, respectively. Results showed that the doping of PEG and Bi significantly improved the electrochemical performance and catalytic oxidation performance of lead dioxide electrodes. The degradation rate of phenol by Sn–Sb/PbO 2 (PEG + Bi) electrode were 1.57 times of that by pure lead dioxide electrode. The removal of TOC and total phenols were 53.2% and 82.7%, respectively at 120 min under 40 mA cm −2 by Sn–Sb/PbO 2 (PEG + Bi) electrode. The changes of biodegradability, biological toxicity and by-products were analyzed. Furthermore, 3,5-dimethylphenol was used as characteristic pollutant to study the degradation mechanism of phenolic pollutants in electrocatalytic system. According to the intermediate products detected by GC-MS, possible degradation pathways in electrocatalytic system were proposed.
研究领域:
环境科学
·
电化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）