Materials
·
2023
·Vol. 16
·期 1
·415
·
IF 3.4
Xiaozhou Cao,Hao Wang,Tianrui Liu,Yuanyuan Shi,Xiangxin Xue
Deep eutectic solvent (DES) has been widely used in the field of metal electrodeposition as an economical and environmentally friendly green solvent. Metallic bismuth films were prepared by electrodeposition from choline chloride-malonic acid (ChCl-MA) deep eutectic solvent (DES) containing BiCl3. Fourier transform infrared (FTIR) spectroscopy and Raman spectroscopy were used to study the structure of ChCl-MA-BiCl3, and the results showed that Bi(III) was in the form of [BiCl6]3−ions. The viscosity of ChCl-MA-BiCl3ranges from 200 to 1200 mPa·s at temperatures from 363 K to 323 K. The conductivity of 0.01 M Bi(III) in ChCl–MA is 3.24 ms·cm−1at 363 K. The electrochemical behavior and electrodeposition of Bi(III) in DES were investigated by cyclic voltammetry (CV) and chronoamperometry. The results showed that the electrodeposition reaction was a quasi-reversible reaction controlled by the diffusion and the nucleation of bismuth was a three-dimensional instantaneous nucleation. The diffusion coefficient of Bi(III) in ChCl-MA was 1.84 × 10−9cm2·s−1. The electrodeposition product was observed by scanning electron microscopy (SEM), and the results showed that the deposition potential has a significant influence on the morphology of the bismuth film. X-ray photoelectron spectroscopy (XPS) shows that bismuth and bismuth oxides are present in the deposited film obtained by electrodeposition.Keywords:bismuth;deep eutectic solvent;electrodeposition;cyclic voltammetry
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 10
·2471-2478
·
IF 2.647
Song Qian,Li Hui,Liu Junji,Hu Shi
Cyclic voltammetry (CV) is a powerful and popular electrochemical technique widely used to study the surface structure of materials through the electrochemical behaviors. Herein CV is utilized to study the electrochemical deposition of selenium (Se) on carbon black-supported Pt nanostructures. We synthesized carbon-loaded platinum nanoparticles (Pt/C) by microwave method and studied the electrochemical behavior of selenium on them. Through the experiment of changing the reverse potential, the corresponding relationship between the Se deposition peak and stripping peak was clarified and the deposition and stripping process of Se was proposed. Meanwhile, we synthesized cubic and octahedral nanocrystals of Pt, and used CV to study the Se deposition on these nanosctructures supported by carbon. It was found that the relative intensity of UPD peaks on Pt is different, as Pt cube @C is dominated by (100) and Pt oct @C electrode is dominated by (111) while Pt@C falls in between.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Coatings
·
2020
·Vol. 10
·期 12
·1154
·
IF 2.436
Xiaozhou Cao,Lulu Xu,Chao Wang,Siyi Li,Dong Wu,Yuanyuan Shi,Fengguo Liu,Xiangxin Xue
The electrochemical behavior and electrodeposition of Sn were investigated in choline chloride (ChCl)–urea deep eutectic solvents (DESs) containing SnCl2by cyclic voltammetry (CV) and chronoamperometry techniques. The electrodeposition of Sn(II) was a quasi-reversible, single-step two-electron-transfer process. The average transfer coefficient and diffusion coefficient of 0.2 M Sn(II) in ChCl–urea at 323 K were 0.29 and 1.35 × 10−9cm2∙s−1. The nucleation overpotential decreased with the increase in temperature and SnCl2concentration. The results of the chronoamperometry indicated that the Sn deposition on tungsten electrode occurred by three-dimensional instantaneous nucleation and diffusion controlled growth using the Scharifker–Hills model. Scanning electron microscopy (SEM) showed that the morphology of the deposits is uniform, as a dense and compact film prepared by potentiostatic electrolysis on Cu substrate. X-ray diffraction (XRD) analysis revealed that the deposits were pure metallic Sn.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2017
·
IF 4.536
Qing Zheng,Ximing Huang,Yao Liu,Xiaotong Fang,Jie Zhang,Huibo Shao
Quantification of the amount of intermolecular hydrogen bonding between ferrocenemethanol and 3-mercaptopropanoic acid on gold was performed by cyclic voltammetry as well as by the finite element simulation, displaying a proof-of-concept that the slight changes of cyclic voltammetry features are used potentially for interpreting the weak molecular interactions. Ferrocenemethanol at a bulk concentration level of 0.5 mM adsorbs on the 3-mercaptopropanoic acid surface by hydrogen bonding, with the fractional surface coverage ranging from 0% to 14% of a monolayer in accordance with the surface coverage of 3-mercaptopropanoic acid which was explored by electrochemical quartz crystal microbalance. The intermolecular hydrogen bonding between ferrocenemethanol and the mercaptopropanoic acid was found to exhibit a Langmuir-type adsorption with the average value of K being 0.24 mM–1. The intermolecular hydrogen bonding between FcCH2OH and the artificial self-assembled monolayer (3-mercaptopropanoic acid) is evident, and the study on quantification of intermolecular hydrogen bonding with this artificial model is meaningful for understanding the molecular recognition events involved in the cell membrane.
研究领域:
电化学
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生物物理学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2019
·
IF 2.547
Shilin Jiang,Kui Liu,Yalan Liu,Taiqi Yin,Zhifang Chai,Weiqun Shi
The electrochemical behavior of Th(IV) on a bismuth electrode in LiCl–KCl eutectic was investigated by various electrochemical techniques , aiming at in-depth elucidation of basic electrochemical and thermodynamic properties of Th in molten salt . The results of cyclic voltammetry and coulometric titration indicated that the reduction of Th(IV) on a liquid Bi electrode occurred at −0.92 V (vs. Ag/AgCl) and was a one-step process with four electrons transferred. In addition, thermodynamic properties of Th in liquid Bi medium were evaluated by coulometric titration method in the temperature range from 723 to 798 K. The redox peaks of Bi 2 Th intermetallic compound were detected at −1.13 and −1.05 V, and the corresponding Gibbs free energy of formation was measured by open circuit chronopotentiometry (OCP). Finally, galvanostatic electrolysis (GE) was conducted on a liquid Bi electrode to extract Th from molten salt at 773 K. X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectrometry (SEM-EDS) were applied to characterize the composition and morphology of the products, and revealed the formation of Bi 2 Th intermetallic compound.
研究领域:
电化学
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材料科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
Metals
·
2016
·Vol. 6
·期 7
·162
·
IF 1.574
Qian Zhao,Tiantian Tang,Peilin Dang,Zhiyi Zhang,Fang Wang
A single electrodeposited film of 6-(3-triethoxysilylpropyl)amino-1,3,5-triazine-2,4-dithiol monosodium (TES) on a copper alloy surface was prepared by the galvanostatic method, then octyl-triethoxysilane (OTES) or hexadecyl-trimethoxysilane (HDTMS) was used to modify the electrodeposited film by the self-assembled technique to fabricate the complex film. The electrodeposition process was inferred by cyclic voltammetry. The single and complex films were characterized by means of contact angle, cyclic voltammetry, Fourier transform infrared spectroscopy (FT-IR), potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). The results showed that the contact angle of the complex film covering the copper alloy surface was up to 118.1° compared with 89.4° of the bare copper alloy. The cyclic voltammogram, polarization curves and EIS indicated that the anti-corrosion performance of complex film was better than that of single electrodeposited TES film, and the protection efficiency was up to 90.2%.Keywords:complex film;cyclic voltammetry;potentiodynamic polarization;anti-corrosion
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
ANALYTICAL BIOCHEMISTRY
·
2024
·
IF 2.6
Shimeng Duan,Haiou Chen,Anyun Xu,Ying He,Meng Li,Ru Zhang,Ruilin Zhang,Huiping Bai
In this study, a simple electrochemical sensor based on l -arginine membrane (P-L-arg/GCE) was developed for rapid and sensitive detection of MDMA and MDA. A polyarginine membrane was obtained through one-step direct electropolymerization, which provides more reaction sites for the analyte and improves the sensitivity of the sensor. Following the optimized selection parameters, the MDMA detection range was established at 1.0 × 10 −7 ∼3.5 × 10 −5 mol L −1 , with a detection limit of 3.3 × 10 −8 mol L −1 . Similarly, the detection range for MDA was established at 1.0 × 10 −7 ∼5.3 × 10 −5 mol L −1 with a detection limit of 3.3 × 10 −8 mol L −1 . Additionally, the potential oxidation mechanism of MDMA and MDA during the REDOX process was analyzed by cyclic voltammetry . Furthermore, the proposed sensor exhibited superior selectivity, excellent reproducibility, and satisfactory stability. The proposed sensors can be used for reliable monitoring of MDMA or MDA in human urine and hair samples, respectively, and it has acceptable analytical reliability and enormous potential for practical applications.
研究领域:
分析化学
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毒理学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2016
·
IF 2.822
Wenbin Zhang,Zhixing Xiong,Yingying Gao,Hang Gao,Ya Zhang
2,2,6,6-Tetramethyl-1-piperidine N -oxyl (TEMPO) and nickel hydroxide (Ni(OH) 2 ) mediated electrooxidation of glycine were performed and roles of bases in these two reactions were investigated by cyclic voltammetry . Trends of 2,4,6-collidine > 2,6-lutidine > 3-picoline > pyridine and KOH > NaOH > LiOH were observed in the studies of bases dependent activities on TEMPO and Ni(OH) 2 mediated glycine electrooxidation, respectively. Base effects can be rationalized by acid neutralization, base assisted deprotonation and the interaction between bases and catalysts.
研究领域:
电化学
·
催化反应
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 9
·1083
·
IF 4.146
Hsiang-Ning Luk,Tsong-Yung Chou,Bai-Hao Huang,Yu-Syuan Lin,Hui Li,Ren-Jang Wu
In this study, the Pd/BiVO4composite was prepared by hydrothermal method as an electrochemical sensing material for epinephrine. X-ray diffraction, scanning electron microscopy, and a transmission electron microscope were used to characterize the samples. In the electrochemical detection system, cyclic voltammetry and differential pulse voltammetry were applied to measure the concentration of the epinephrine solution (0.9–27.5 µM) with the Pd/BiVO4-coated glassy carbon electrode. As a result, the oxidation peak current of Pd/BiVO4/GCE demonstrated good linearity with the epinephrine concentration. The detection limit of the epinephrine concentration by cyclic voltammetry and differential pulse voltammetry were 0.262 µM and 0.154 µM, respectively. Additionally, the proposed sensing material exhibited good reproducibility, stability, and selectivity. A plausible sensing mechanism was proposed.Keywords:epinephrine;cyclic voltammetry;differential pulse voltammetry;Pd/BiVO4
研究领域:
生物医学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Yuting Li,Haiping Qi,Meiqi Fan,Zixing Zhu,Shijie Zhan,Lin Li,Bing Li,Xia Zhang,Xianglong Zhao,Jingjing Ma,Lifeng Wang
The reaction efficiency of o -benzoquinones with amines (L-lysine, Nα-acetyl-L-lysine, glycine, L-methionine and L-arginine), thiols (L-cysteine and Nα-acetyl-L-cysteine) and protein (bovine serum albumin) were determined at pH 5.0, 7.0 and 8.0 and scan rate of 10, 50 and 100 mV/s by cyclic voltammetry. Nucleophiles containing multiple nucleophilic groups and nucleophilic group possessing low pKa value would enhance the reactivity of nucleophiles towards o -benzoquinones. The reactivity of different o -benzoquinones with L-lysine/L-cysteine followed the order: protocatechuic acid quinone ≈ catechol quinone > 4-methylbenzoquinone ≈ caffeic acid quinone > rosmarinic acid quinone > chlorogenic acid quinone. The reactivity of quinones would be decreased by the steric hindrance of substituents on quinone ring, and it would also be weakened by enhancing electron cloud density of quinone ring. Adducts generated by the interaction of 4-methylbenzoquinone with amines and thiols were tentatively identified as amine-quinone adduct and thiol-phenol adduct respectively by UPLC-QTOF-MS/MS and cyclic voltammetry.
研究领域:
生物化学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2020
·
IF 2.615
Ai-min LIU,Meng-xia GUO,Zi-yang LÜ,Bao-guo ZHANG,Feng-guo LIU,Wen-ju TAO,You-jian YANG,Xian-wei HU,Zhao-wen WANG,Yu-bao LIU,Zhong-ning SHI
To investigate the electrochemical reduction mechanism of Ta(V) in ethylene carbonate and aluminum chloride (EC−AlCl 3 ) solvate ionic liquid, cyclic voltammetry experiments were conducted on a tungsten working electrode. Four reduction peaks were observed in the cyclic voltammogram of the EC−AlCl 3 −TaCl 5 ionic liquid. The reduction peaks at −0.55, −0.72, and −1.12 V (vs Al) were related to the reduction of Ta(V) to tantalum metal by three stages including the formation of Ta(IV) and Ta(III) complex ions. The reduction of Ta(III) to tantalum metal was an irreversible diffusion-controlled reaction with a diffusion coefficient of 3.7×10 −7 cm 2 /s at 323 K, and the diffusion activation energy was 77 kJ/mol. Moreover, the cathode products at 323 K were characterized by scanning electron microscopy, energy-dispersive spectroscopy, and X-ray photoelectron spectroscopy. The results showed that tantalum metal and tantalum oxides were obtained by potentiostatic electrodeposition at −0.8 V for 2 h.
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
·
2017
·
IF 3.012
Shucheng Wu,Lili Xiao,Zhenzhen Du,Haoqiang Wang,Qunhui Yuan,Hengxing Ji
In this study, an activated porous graphite oxide (PG) with a superior surface area of ~ 3010 m 2 g − 1 was applied as electrode component for discrimination of dopamine (DA) and uric acid (UA) via cyclic voltammetry (CV), in the presence of high content of ascorbic acid (AA). Contributable to microwave exfoliation and KOH assisted activation, the as-prepared PG remarkably improves the signal at glassy carbon electrode (GCE) for analyte. The electrochemical performance of PG/GCE was studied with CV and electrochemical impedance spectroscopy (EIS) measurements. The CV data implied that the PG film effectively enlarges the electro-active area of the working electrode while the EIS data revealed that the PG modification enhances the electron transfer kinetics between analyte and electrode. The peak separations between DA, UA and AA were remarkably enlarged and their redox peak currents were enhanced. This makes the proposed sensor feasible for simultaneous determination of DA and UA in the presence of AA. Under optimum conditions, the oxidation peak currents for DA and UA increased linearly over concentration ranges of 0.5–60 μM and of 0.5–100 μM, with detection limits of 0.04 μM and 0.02 μM (at a signal-to-noise ratio of 3, S/N = 3), respectively. Applications of the PG/GCE for urine and serum analyses were investigated. The results with good recoveries indicate the feasibility of the developed electrode in clinic sensing application.
研究领域:
分析化学
·
材料科学
·
生物医学
✓ 已验证
DOI
高影响因子
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