INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2021
·Vol. 45
·期 6
·8577-8592
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IF 5.164
Wei Han,Wei Wang,Yongqiang Zhang,Yijie Wang,Mei Li,Yang Sun
Summary To recover Pr from molten chlorides, the electrode reactions of Pr 3+ on Sn-coated W and liquid Sn electrodes were studied by a group of electrochemical techniques. CV and SWV results exhibited that the electrochemical signals pertaining to the formation of Pr-Sn alloy compounds and solid solution appeared at less negative potentials than that of Pr 3+ on W electrode. The thermodynamic data of Pr-Sn alloy compounds and the kinetic parameters for PrSn 3 /Pr 3+ pair were determined employing OCP, LP, and Tafel methods, separately. The measured diffusion coefficient ( D ) of Pr in liquid Sn metal was 9.40 × 10 −6 cm 2 s −1 . Furthermore, the electrochemical recovering Pr from molten salt was performed using liquid Sn as a working electrode, and the formed Pr-Sn samples characterized by XRD and SEM-EDS were composed of Sn and PrSn 3 phases.
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 ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Mei Li,Zhixiang Shan,Rugeng Liu,Meng Zhang,Wei Han
The electrochemical investigation of Ce(III) was carried out on W, Sn film and liquid Sn electrodes in LiF-LiCl eutectic by a variety of electrochemical methods. It was determined that Ce(III) was reduced to metallic Ce on W electrode via a one-step three-electron transfer, which was a reversible process controlled by diffusion. The diffusion coefficient of Ce(Ⅲ) in LiF-LiCl eutectic was estimated by CV and CP, while the diffusion activation energy was calculated to be 20.86 kJ mol −1 and 20.95 kJ mol −1 , respectively. The electrochemical behavior of Ce(Ⅲ) was studied on Sn film electrode by CV and OCP. Eight alloy compounds Ce x Sn were obtained due to the underpotential deposition of Ce on the pre-deposited Sn film electrode. The activities of Ce in Ce x Sn and standard Gibbs formation energies of Ce x Sn were evaluated, respectively. Moreover, on Sn film electrode, the electrochemical extraction of Ce was performed at −1.5 V. XRD, SEM and EDS results exhibited the formation of CeSn 3 and Ce 2 Sn 5 . On liquid Sn electrode, the reduction current of Ce appeared at about −1.2 V and reached a peak at about −1.4 V. The electrochemical extracting Ce was also conducted on liquid Sn electrode at −1.3 V and CeSn 3 was obtained. The extraction rates and efficiencies of Ce on liquid Sn electrode were estimated using ICP-AES at different durations. It was found that as the extraction proceeded, the extraction rate decreased, while the extraction efficiency increased. The extraction efficiency reached over 98 % after electrolysis for 10 h.
研究领域:
冶金学
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电化学
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DOI
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 15
·2008095
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IF 30.849
Yanxin Yao,Zengyue Wang,Zhejun Li,Yi-Chun Lu
Metal-based aqueous redox flow batteries (ARFBs) such as zinc-based ARFBs have attracted remarkable attention owing to their intrinsic high energy density. However, severe dendrite issues limit their efficiency and lifespan. Here an aqueous metal anode operating between Sn(OH) 6 2− (stannate) and metal Sn is presented, providing a reversible four-electron transfer at −0.921 V vs standard hydrogen electrode. In strong contrast to severe Zn dendrites, the Sn(OH) 6 2− /Sn electrode shows smooth and dendrite-free morphology, which can be attributed to its intrinsic low-surface-energy anisotropy which facilitates isotropic crystal growth of Sn metal. By coupling with iodide/tri-iodide (I − /I 3 − ), the static Sn–I cell demonstrates a stable cycling for 500 cycles (more than 2 months). In contrast, the state-of-the-art Zn anode suffers from serious dendrites and lasts less than 45 cycles (190 h) in Zn–I cells. A stable continuous flow cycling of Sn–I cell achieves a Sn areal capacity of 73.07 mAh cm −2 at an average discharge voltage of 1.3 V for 350 h. The alkaline Sn electrode demonstrates dendrite-free morphology and superior performance in cycle life and areal capacity compared to state-of-the-art Zn metal anodes, offering a promising metal anode for high-energy ARFBs and other metal-based rechargeable aqueous batteries.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 10
·102505
·
IF 4.316
Chenteng Sun,Qian Xu,Yongxiang Yang,Xingli Zou,Hongwei Cheng,Xionggang Lu
The electrochemical behaviors of Li+ and Nd3+ were investigated on W, liquid Sn pool and Sn film electrodes in LiCl-KCl-NdCl3 melt at 673 K. Various electrochemical techniques, such as cyclic voltammogram, square wave voltammogram, and open circuit chronopotentiometry, were conducted to evaluate the electrochemical behaviors of Li+ and Nd3+. The reduction of Nd3+ was found to be a two-step process in the W electrode and a one-step process in the liquid Sn electrode. During the formation of the Nd-Sn intermetallic compounds, only the NdSn3 would be formed without the reduction of the Li+ in the liquid Sn electrode. When the reduction potential moves over −2.77 V vs Cl2/Cl−, the Li+ in the electrolyte would inevitable be reduced into the liquid Sn electrode. The Nd-Sn intermetallic compounds were deposited on the liquid Sn pool electrode at −2.74 V vs Cl2/Cl− in the LiCl-KCl-NdCl3 melts for 5 h. The products were characterized by SEM-EDS and XRD. The loose product on the surface of the deposition displayed the existence of NdSn3 in Nd-Sn intermetallic compounds. The high content of Nd inclusion formed by segregation was detected in the solidified Sn electrode.
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 HAZARDOUS MATERIALS
·
2015
·
IF 4.529
Bo Yang,Chaojin Jiang,Gang Yu,Qiongfang Zhuo,Shubo Deng,Jinhua Wu,Hong Zhang
The novel F-doped Ti/SnO 2 electrode prepared by SnF 4 as the single-source precursor was used for electrochemical degradation of aqueous perfluorooctanoic acid (PFOA). Higher oxidation reactivity and significantly longer service life were achieved for Ti/SnO 2 –F electrode than Ti/SnO 2 – X ( X = Cl, Br, I, or Sb) electrode, which could decomposed over 99% of PFOA (50 mL of 100 mg L −1 ) within 30-min electrolysis. The property of Ti/SnO 2 –F electrode and its electrooxidation mechanism were investigated by XRD, SEM–EDX, EIS, LSV, and interfacial resistance measurements. We propose that the similar ionic radii of F and O as well as strong electronegativity of F caused its electrochemical stability with high oxygen evolution potential (OEP) and smooth surface to generate weakly adsorbed OH. The preparation conditions of electrode were also optimized including F doping amount, calcination temperature, and dip coating times, which revealed the formation process of electrode. Additionally, the major mineralization product, F − , and low concentration of shorter chain perfluorocarboxylic acids (PFCAs) were detected in solution. So the reaction pathway of PFOA electrooxidation was proposed by intermediate analysis. These results demonstrate that Ti/SnO 2 –F electrode is promising for highly efficient treatment of PFOA in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2020
·
IF 1.467
Ling Cao,Zheng Li,Rui Jia,Li Chen,Ying Wu,Junwei Di
A highly sensitive photoelectrochemical sensor for the determination of ciprofloxacin has been fabricated using a small gold nanoparticles (AuNPs) modified indium tin oxide (ITO) electrode. It operates on the size-dependent enhancement behavior of AuNPs which efficiently increase the photocurrent intensity of the ITO/AuNPs photoelectrode due to plasmonic-excitation. The ITO/AuNPs photoelectrode self-assembled with two layers of approximately 5 nm gold nanoparticles showed the highest photocurrent response. Moreover, the adsorption of ciprofloxacin on the Au surface resulted in a decrease of photocurrent intensity at the ITO/AuNPs photoelectrode. This deceased photocurrent had a linear relationship with the ciprofloxacin concentration across a wide range from 0.1 nM to 10 µM with a low detection limit of 0.08 nM. This photoelectrochemical sensor is simple, cost-effective, highly sensitive, and very selective. This device may potential applications for the determination of ciprofloxacin in environmental waters. The proposed method was compared with other analytical methods reported in the literatures.
研究领域:
分析化学
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环境科学
·
纳米技术
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DOI
高影响因子
ANALYST
·
2021
·Vol. 146
·期 17
·5403-5412
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IF 4.616
Shiying Zhou,Xianfeng Wang,Liuyi Jiang,Human Sun,Danqun Huo,Changjun Hou
Two different electrochemical sensors (Hemin-G4/Au/GCE and Hemin-G4/Au/ITO) were developed and applied to explore the electrocatalytic capacity of H2O2 reduction. Due to the excellent catalytic activity of Hemin-G4 and high conductivity of gold nanoparticles, both electrodes show excellent electrochemical performances towards H2O2 with a low LOD (0.67 μM for Hemin-G4/Au/GCE and 0.65 μM for Hemin-G4/Au/ITO), rapid response (<4 s), and high selectivity and sensitivity (314.33 μA mM−1 cm−2 for Hemin-G4/Au/GCE and 322.22 μA mM−1 cm−2 for Hemin-G4/Au/ITO). The two electrodes allow sensitive capture of H2O2 produced by A549 cells. Compared with the conventional method of detection in cell suspensions, an ITO electrode with a large specific surface area and good biocompatibility can provide a promising platform for cell adhesion, so as to realize real-time and in situ detection of extracellular H2O2. The experimental results show that A549 cells can adhere to the surface of the Hemin-G4/Au/ITO electrode and grow well. This is benefitted from the three-dimensional structure of the Hemin-G4/Au hydrogel, which provides a suitable microenvironment for cell adhesion and growth. Furthermore, the in situ detection shows a faster response time than that of in-solution detection. This is because the H2O2 generated by the cells can be directly captured by the ITO electrode, which avoids diffusion from the solution to the electrode. These results indicate that the self-supporting hydrogel modified ITO electrode has great application prospects in basic biomedical research and continuous dynamic surveillance of diseases.
研究领域:
电化学
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生物传感器
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生物医学工程
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Helei Dong,Hao Zhang,Feng He,Zhen Jia,Kailong Wei,Qiulin Tan
To achieve an economic advantage, nanocrystalline Ba 0.5 Sr 0.5 TiO 3 (BST) thin films were prepared on FTO-coated glass substrates using an aqueous sol–gel process. The crystal structures and chemical states of the obtained thin films were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The XRD patterns confirmed the perovskite structure of the BST samples, while XPS analysis demonstrated that Ba element was in its single oxidation state in the film with annealing temperature of 600 °C. In contrast, Ba was present in a mixed oxidation state upon increasing the annealing temperature. It was found that the BST thin film prepared at a relatively low annealing temperature of 600 °C exhibited optimal crystallinity and superior dielectric properties , along with excellent optical transparency. More specifically, this film exhibited a dielectric tunability of 44.81% (1.33 MV/cm), a figure of merit of 56.01, and an average transmittance of 87.2% in the visible region.
研究领域:
材料科学
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物理学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xiangli Zheng,Shan Liu,Xiaoxia Hua,Fangquan Xia,Dong Tian,Changli Zhou
ABSTRACT A new electrochemical sensor for determination of 2,4,6-trichlorophenol (2,4,6-TCP) was fabricated. The characterization of the sensor was studied by scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry techniques. The electrochemical behavior of 2,4,6-TCP was investigated using cyclic voltammetry and differential pulse voltammetry at the HS-β-cyclodextrin (HS-β-CD)/gold nanoparticles (AuNPs) composite modified indium tin oxide (ITO) electrode. The results showed that the current responses of 2,4,6-TCP greatly enhanced due to the high catalytic activity and enrichment capability of composites. The peak current of 2,4,6-TCP increases linearly with the increase of the 2,4,6-TCP concentration from 3.0 × 10 −9 to 2.8 × 10 −8 M, with the limit of detection of 1.0 × 10 −9 . Further more, the modified electrode was successfully applied to detect the level of 2,4,6-TCP in tap water samples with excellent sensitivity.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 60
·48811-48815
·
IF 3.84
Maochao Wei,Shuo Duan,Shan Liu,Xiangli Zheng,Fangquan Xia,Changli Zhou
In this paper, specific electrochemical interaction between phenanthrene (Phe) and anthraquinone sulfonate (AQS) was first investigated by Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV). Poly diallyldimethylammonium chloride (PDDA) and AQS were modified onto indium–tin oxide (AQS/PDDA/ITO) by self-assembling. Owing to the specific interaction between AQS and Phe, the amount of Phe could be quantified by the electrochemical oxidation peak current difference of AQS at AQS/PDDA/ITO in the range from 1.0 × 10−12 to 1.0 × 10−9 mol L−1 with a linearity (r = 0.9942) and a low detection limit of 5.0 × 10−13 mol L−1 (S/N = 3). As an example of its practical application, the new sensor was used for quantitative determination of Phe in a standard sample and cloud-rain water samples of Mount Taishan with satisfactory results.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
IEEE ELECTRON DEVICE LETTERS
·
2024
·Vol. 45
·期 3
·396-399
·
IF 4.1
Yilun Zhong,Jiwei Zou,Taoming Guo,Lei Han,Ye Zou,Wei Tang,Yongpan Liu,Huazhong Yang,Yunlong Guo,Chen Jiang
Transparent organic thin-film transistors (OTFTs) are promising for bioelectronics applications, by allowing simultaneous optical imaging with electrical sensing and modulation. However, the state-of-the-art transparent OTFTs have limited device performance, in terms of low mobility and high threshold voltage. This is mainly attributed to the large contact resistance induced by the energy level mismatch between the transparent electrodes and organic semiconductors. He re, we report transparent OTFTs with indium tin oxide electrodes modified by fluorinated silanes to improve device performance. It is found that the OTFTs with electrode modified by fluorinated silanes exhibit increased mobility from 0.12 cm2/ $\text{V}\cdot \text{s}$ to 1.58 cm2/ $\text{V}\cdot \text{s}$ and lower threshold voltage from–12.45 V to–2.21 V. The contact resistance of the OTFT characterized by a transmission line method, shows a reduction from over 1 $\text{M}\Omega $ to below 100 $\text{k}\Omega $ .
研究领域:
材料科学
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电子工程
·
生物电子学
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产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2023
·Vol. 55
·期 1
·128-143
·
IF 3
Guo Lei,Yin Huayi,Gao Shuaibo,Wang Shiyu,Du Kaifa,Shi Hao,Wang Dihua
Potassium (K) cannot be produced by molten-salt electrolysis due to its high vapor pressure and erosion of the graphite anode by K. To overcome this problem, a liquid tin (Sn) electrode was employed to enable the electrolysis by accommodating K in the form of K-Sn alloy that can be separated into K gas and Sn by a following distillation approach. The so-called electrolysis-distillation (ED) approach was conducted in molten K 2 CO 3 -KCl along with a nickel (Ni)-based inert oxygen-evolution anode at 150 to 700 mA/cm 2 at 700 °C. The K-Sn alloys were obtained with a current efficiency of >70 pct at 350 mA/cm 2 without harmful chlorine gas (Cl 2 ) generation, and the chemical diffusion coefficient of K in liquid Sn is ~ 5.21×10 −5 cm 2 /s. Moreover, the Ni-based alloy inert anode was stably served for over 100 hours. The vacuum distillation was conducted at 650 °C for 90 minutes to obtain K metal with a purity of 99.99 pct and a recovery rate of 93.5 pct. Therefore, the ED approach developed here is an efficient and clean route to produce K metal.
研究领域:
无机化学
·
材料科学
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冶金工程
·
电化学
·
能源化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）