JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Yuncong Ding,Xiaorui Xu,Xinyu Zhang,Chengyu Wang,Wentao Zhou,Yafei Wang
In the present study, cyclic voltammetry was performed to investigate CeCl 3 in a LiCl-KCl eutectic molten salt at various concentrations. The results indicate that the overlap degree of cyclic voltammograms at different cycles deteriorates with the increasing CeCl 3 concentration in the molten salt. This phenomenon was attributed to higher concentrations of CeCl 3 , which led to a non-uniform film on the electrode surface. This was evidenced by material characterization of the working electrode after cyclic voltammetry (CV) testing and the simulated cyclic voltammograms of a reversible electrochemical reaction. This study will provide new insights that enhance our understanding of the electrochemistry of the CeCl 3 -LiCl-KCl system and offer valuable reference for other soluble-insoluble electrochemical systems.
研究领域:
物理化学
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材料科学
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产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Xin Du,Shaoqiang Guo,Sheng Wang
Fission product tellurium causes severe embrittlement of nickel alloys in nuclear molten fuel salt systems. This paper investigates the tellurium chemistry in molten LiCl-KCl-Li 2 Te salts and the tellurium reactions at the alloy interface. The reactions for the two-step reduction of Te 0 and the electrochemical formation of nickel tellurides have been identified from cyclic voltammograms. The corrosion of UNS N10003 alloy with different tellurium salt chemistries and applied potentials found that tellurium corrosion attack is only present at potentials more positive than the Ni 1.43 Te / Te 2 − potential. The critical potential is thus suggested for mitigating tellurium embrittlement using the redox control technique.
研究领域:
材料科学
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核工程
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电化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Zongxu Wang,Zixin Li,Amado Velázquez-Palenzuela,Yinge Bai,Haifeng Dong,Lu Bai,Xiangping Zhang
Bubbles generated on the electrode surface have been considered one of important factors limiting the efficiency of hydrogen evolution reaction (HER). However, the bubble formation behaviors have not been clearly defined, especially nanobubbles in ionic liquid system. In this work, single H 2 nanobubbles generation characters are well investigated using platinum nanoelectrodes in ionic liquid (IL) during HER. The crucial factors ( i . e ., critical condition, geometry, and nucleation rapid of the H 2 nanobubbles) are quantitatively conducted from the voltammograms. The results reveal that the H 2 nanobubbles have a small contact angle (from 152° to 160°) and large bubble height (0.5–1.1 nm), which are favorable for subsequent detachment from nanoelectrode surface. Moreover, higher nucleation energy (7.5–15.3 kT) indicates that IL can suppress bubble formation. This work has gained a fundamental insight into the dynamic formation behaviors of H 2 nanobubble in IL, which can guide us to study H 2 bubbles in the HER influenced by various factors.
研究领域:
化学
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电化学
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材料科学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Xinyu Lu,Peng Liu,Krishna Bisetty,Yue Cai,Xuemin Duan,Yangping Wen,Yifu Zhu,Liangmei Rao,Quan Xu,Jingkun Xu
Machine learning (ML) plays an important role in the electrochemical application of electrode materials. In this work, an emerging machine learning strategy for both electrochemical sensor and supercapacitor using carbonized metal–organic framework (C-ZIF-67) is proposed. The morphology and element analysis of C-ZIF-67 are characterized and further demonstrate the presence of C, N, O, Co elements. The ML model based on artificial neural network (ANN) algorithm as a powerful tool to realize intelligent analysis of niclosamide (NA), the derivative technique as an auxiliary means of voltammogram treatment to reduce personal error from data-reading and improve the sensitivity of electrochemical responses at very low concentrations, and the theoretical calculation is employed for both adsorption and binding energy, optimized structure of the prepared sensing material. The developed sensor displays excellent electrochemical response about 196.6-fold improvement compared with the bare GCE for NA, wider linear ranges of intelligent analysis from 1 nM to 9 μM with low limit of detection of 0.3 nM, and satisfactory practicability. ML model with ANN algorithm is also employed for predicting the performance of supercapacitor. The supercapacitor shows good performance with capacitance of 336.67 F/g at the current density of 2 A/g and excellent prediction with acceptable errors. This work will provide a new strategy for the development and electrochemical application of bifunctional electrode materials using the ML technique combined with theoretical calculation.
研究领域:
电化学
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材料科学
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机器学习
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分析化学
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能量存储
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Liman Chen,Bo Liang,Meng Cao,Yang Yang,Di Wang,Qian Yang,Zhenyu Han,Guixiang Wang,Yanli Wang,Meng Zhang,Mingjian He,Caishan Jiao
It is necessary to improve the current efficiency and thickness distribution of the electrodeposition of Al coatings on a Mg alloy from ionic liquids. To accomplish this, finite element method is presented here to help experimental processes to refine various electrodeposition conditions for improving efficiency and economy. However, the simulation of Al deposition from ionic liquids is hindered by the lack of initial parameters in existing works. In this paper, the initial kinetic parameters used in the model were obtained precisely using Tafel plots and cyclic voltammograms. The cathodic and anodic transfer coefficients were calculated to be 0.136 and 0.864 at 318.15 K. The exchange current density for A l 2 C l 7 − / A l C l 4 − redox process was calculated as 4.6A/m 2 at 318.15 K. Subsequently, the multiphysics model in this work combined secondary current distribution, laminar flow, and transport of diluted species. The results of the Al coating thicknesses from finite element method agree well with the experimental method. Hence, the finite element model can precisely predict the Al coating thickness, which provides a positive outlook to analyze the thickness of Al coating and promotes its utilization in industry.
研究领域:
材料科学
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电化学
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计算建模
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表面工程
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产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2011
·Vol. 60
·期 4
·703-710
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IF 2.056
Zhihong Zhang,Yan Liang,Ping Liang,Chao Li,Shaoming Fang
In order to fabricate a new polymer matrix for application in biochips and to understand the mechanism of adsorption of proteins on conducting polymers, we prepared polypyrrole (PPy) functionalized with ω-( N -pyrrolyl)-octylthiol moieties. The chemical structure of the polymer could be controlled by varying the concentration of pyrrole added as the monomer. Initially, ω-( N -pyrrolyl)-octylthiol was self-assembled into a monolayer on a gold surface. Thereafter, a layer of uniform and smooth PPy was obtained by the chemical copolymerization of pyrrole and the ω-( N -pyrrolyl)-octylthiol. Bovine serum albumin (BSA) adsorption on the polymer was investigated using surface plasmon resonance spectroscopy and cyclic voltammograms. The chemical structure and monomer components of the as-prepared films were characterized using Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Water contact angle measurements were used to assess the surface wettability of the films throughout the preparative procedure. The kinetics of BSA adsorption onto the polymer could be controlled by varying the copolymer thickness and the pH value of the buffer solutions used. Moreover, the electroactivity was changed upon BSA binding. The results suggest that the new conducting polymer may potentially be applied as a more sensitive and reliable matrix in protein sensors. Copyright © 2011 Society of Chemical Industry
研究领域:
材料科学
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生物技术
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分析化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）