CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Sijie Xie,Yongbo Chen,Zhijie Bi,Shasha Jia,Xiangxin Guo,Xiangdong Gao,Xiaomin Li
A carefully designed energy storage smart window (ESSW) was successfully demonstrated with transparent-to-dark electrochromic behavior and improved pseudocapacitive performance that constructed by Mo-doped WO 3 film electrode and MnO 2 nanoflake film electrode. These two electrodes were all synthesized by facile electrodeposition method which is simple, economic and easy-to-production. The proposed ESSW could change its color between transparent and dark with over 60% optical modulations in all visible bands (420–800 nm), which is satisfactory to the applications toward energy saving. Also, the areal capacitance of the ESSW reaches 19.1 mF cm −2 with working voltage window of 2.0 V so that just one single ESSW could power an LED bulb for more than 90 s. The complementary electrochromic behavior of the two electrodes guarantees the commendable electrochromic performance of the proposed ESSW, and the well-matched working potentials and areal capacitances of the asymmetric electrodes improve the pseudocapacitive performance. Such ESSW could have widely future applications toward energy saving and storing fields.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Peishu Yang,Zhenyu Jiang,Yongzhi Shi,Xinyu Ren,Lisha Liang,Qingyi Shao,Kaigui Zhu
Due to the large number of defects and high entropy properties, high entropy alloy thin film electrodes prepared by magnetron sputtering are beneficial for electrocatalytic oxygen evolution reaction (OER). However, the electrocatalytic OER performance of high entropy alloy thin film electrodes without activation is limited. In this work, in-situ reconstruction (chloride corrosion) is applied to activate FeCoNiCrMn high entropy alloy thin film electrodes for promoting the electrocatalytic OER performance. The research reveals that high entropy hydroxides and high entropy (oxy)hydroxides, which are real active centers of OER electrocatalysts , are generated on the surface of FeCoNiCrMn high entropy film electrodes during in-situ reconstruction. Moreover, it is also proved that there is an obvious quantitative relationship among elements in the surface of the high entropy alloy thin film electrodes after complex chloride corrosion reaction: Ni>Mn>Fe>Co>Cr. In addition, the OER performance of FeCoNiCrMn high entropy film electrodes with in-situ reconstruction can achieve an overpotential of 263 mV and a Tafel slope of 50.9 mVdec −1 . Moreover, sponge-like structures created by in situ reconstitution can help to increase surface active areas and the increased contents of high-valence elements after in situ reconstruction contribute to enhance electrocatalytic OER activity.
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
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jing Wang,Jia-Wei Fang,Zhi-Yong Ji,Zhi-Yuan Guo,Xin-Wei Li,Jie Liu,Ying-Ying Zhao,Zhong Liu,Feng-Feng Gao,Yuan Zhong,Jun-Sheng Yuan
Lithium extraction from the solution in low Li + concentration by an energy-saving and high-efficiency method is still a challenge. Herein, a novel hollow porous LiMn 2 O 4 (H-LMO) with highly active site was proposed to enhance the extraction performance of Li + . Based on the established hollow porous structure, the H-LMO film electrode (H-LMOE) exhibits excellent lithium electrosorption performance and stability. Under the current density of 0.5 C, the electrosorption capacity of Li + could reach 31.52 mg/g, the separation coefficient of Li + /Mg 2+ was 581.67, and the energy consumption was as low as 0.49 Wh/mol Li. This unique structural strengthening mechanism made H-LMOE maintain a good Li + extraction performance even in a solution of low Li + concentration. The Li + electrosorption capacity of H-LMOE was 2.13 times that of T-LMOE in a 60 mg/L Li + solution, while the specific energy consumption of the H-LMOE was 15.78% lower than that of the traditional-LiMn 2 O 4 film electrode (T-LMOE). Even in a 10 mg/L Li + solution, the electrosorption capacity of H-LMOE was 21.48 mg/g, which was 10.0% higher than that of T-LMOE. Moreover, after 50 recycling processes, the final electrosorption capacity of the H-LMOE was about 25.0% higher than that of the T-LMOE.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2013
·
IF 5.437
Kai Yan,Rui Wang,Jingdong Zhang
A novel photoelectrochemical (PEC) biosensing platform was constructed by assembling CdSe quantum dots (QDs) and DNA on liquid phase deposited TiO 2 (DNA–CdSe/TiO 2 ) film electrode. The transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis indicated that CdSe QDs were homogeneously assembled on TiO 2 film. The UV–visible diffuse reflectance spectra (DRS) showed that CdSe and DNA could effectively enhance the absorption of TiO 2 film to visible light. The obtained electrode showed a sensitive PEC response to o -aminophenol (OAP) under visible light irradiation . Due to the interaction between DNA and OAP, the response of OAP was improved by DNA immobilized on the sensing film. Under optimized conditions, the photocurrent was linearly proportional to OAP in the concentration range from 4.0×10 −7 to 2.7×10 −5 mol L −1 , with a detection limit (3 S/N) of 8.0×10 −8 mol L −1 . The novel strategy could provide a fast and sensitive method for OAP determination.
研究领域:
生物传感技术
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材料科学
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分析化学
✓ 已验证
DOI
高影响因子
POLYMER
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2023
·
IF 4.6
Jiani Gao,Yilong Chu,Yuyang Yan,Shuangshuang Zhou,Xiaowei Li,Cheng-Bo Li
Here, poly(1,3,5-tri(thiophene-2-yl)benzene) (PTTB) membrane electrodes with porous surface structures were prepared by using an electropolymerization method. Firstly, a series of PTTB film electrodes with different morphologies are obtained, including open nanotubes , stacked flocs, dispersed cauliflower-like, and aggregated spheres, by separately depositing the PTTB films on different conductive substrates (GCE, silicon wafers, ITO , FTO). Secondly, this study explored the factors affecting the photoelectric properties and stability of PTTB film electrodes by varying the solvent, electrochemical method, scan rate, and number of scan cycles. Finally, the CV method and DCM/ACN mixed solvent were used in this experiment, and the best photoelectric effect of 3.2 μA was obtained under 3 scan cycles. In this study, the factors influencing the properties of PTTB by electrochemical polymerization methods are obtained through the exploration of PTTB film electrodes, providing a reference value for further combining PTTB films with other materials to prepare composite photoelectrodes .
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2013
·Vol. 25
·期 6
·1446-1452
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IF 2.817
Chen Chen,Xiangheng Niu,Yan Chai,Hongli Zhao,Minbo Lan,Yonggang Zhu,Gang Wei
This work presents a disposable bismuth-antimony film electrode fabricated on screen-printed electrode (SPE) substrates for lead(II) determination. This bismuth-antimony film screen-printed electrode (Bi-SbSPE) is simply prepared by simultaneously in situ depositing bismuth(III) and antimony(III) with analytes on the homemade SPE. The Bi-SbSPE can provide an enhanced electrochemical stripping signal for lead(II) compared to bismuth film screen-printed electrodes (BiSPE), antimony film screen-printed electrodes (SbSPE) and bismuth-antimony film glassy carbon electrodes (Bi-SbGC). Under optimized conditions, the Bi-SbSPE exhibits attractive linear responses towards lead(II) with a detection limit of 0.07 µg/L. The Bi-SbSPE has been demonstrated successfully to detect lead in river water sample.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Ziying Ji,Ying Feng,Lu Liu,Wei Zheng,Meng Wu,Yuexia Li,Zhengming Sun,Guobing Ying
Energy storage devices are progressively advancing in the light-weight, flexible, and wearable direction. Ti 3 C 2 T x flexible film electrodes fabricated via a non-contact, cost-effective, high-efficiency, and large-scale inkjet printing technology were capable of satisfying these demands in our previous report. However, other MXenes that can be employed in flexible energy storage devices remain undiscovered. Herein, flexible V 2 CT x film electrodes (with the low formula weight vs Ti 3 C 2 T x film electrodes) with both high capacities and excellent photoelectric properties were first fabricated. The area capacitances of V 2 CT x film electrodes reached 531.3–5787.0 μF⋅cm −2 at 5 mV⋅s −1 , corresponding to the figure of merits (FoMs) of 0.07–0.15. Noteworthy, V 2 CT x film electrode exhibited excellent cyclic stability with the capacitance retention of 83 % after 7,000 consecutive charge–discharge cycles. Furthermore, flexible all solid-state symmetric V 2 CT x supercapacitor was assembled with the area capacitance of 23.4 μF⋅cm −2 at 5 mV⋅s −1 . Inkjet printing technology reaches the combination of excellent photoelectric properties and high capacities of flexible V 2 CT x film electrodes, which provides a new strategy for manufacturing MXene film electrodes, broadening the application prospect of flexible energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Qixing Wu,Yunhui Lv,Liyu Lin,Xiangyang Zhang,Yao Liu,Xuelong Zhou
The thin-film electrode has been regarded as one of the desirable options for the vanadium redox flow battery . However, most of the thin-film electrodes developed to date suffer from high mass transport resistance and deliver unsatisfactory performance. In this work, we proposed a dual-layer thin-film electrode, consisting of a backing layer and a catalyst layer , for flow batteries . The backing layer with larger pores is adapted to improve the concentration distribution as well as to provide mechanical support while the catalyst layer with smaller pores provides sufficient active sites. The electrospun fiber mat is adopted as catalyst layer and backing layers in the study include carbon paper , carbon cloth and graphite felt. It is showed that carbon cloth supported electrospun fiber mat electrode demonstrates an energy efficiency of 76.1% at the current density of 240 mA cm −2 , which is much higher that achieved by conventional electrospun fiber mat electrodes (61.9%). After optimizations of flow field designs and key operational parameters, the energy efficiency of battery with dual-layer structured electrodes can reach as high as 80.2% at a current density of 240 mA cm −2 . In addition, the present battery can stably operate for more than 800 cycles without obvious decay.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Ziying Ji,Lu Liu,Quanguo Jiang,Wei Zheng,Meng Wu,Yuexia Li,Zhengming Sun,Guobing Ying
Two-dimensional nanolayered Mo 2 CT x is an excellent electrode material due to its large surface area and high conductivity. In this paper, Mo 2 C powders and metal Ga with the molar ratio of 1:3 as raw materials were used to prepare phase-pure Mo 2 Ga 2 C ceramic materials by non-pressure sintering at 750 °C, and two-dimensional nano-layered Mo 2 CT x materials were etched successfully using a facile oil bath method by HF. Capacitive behaviors of flexible and freestanding Mo 2 CT x film electrode prepared by the facile vacuum filtration in 1 M H 2 SO 4 , 1 M Na 2 SO 4 and 1 M NaOH electrolytes were systematically investigated for the first time. Mo 2 CT x film electrode exhibits the pseudo-capacitive behavior in H 2 SO 4 electrolyte, while double layer capacitance is presented in Na 2 SO 4 and NaOH electrolytes. The maximum volumetric specific capacitance of 563.05 F/cm 3 at 2 mV/s is in H 2 SO 4 electrolyte, corresponding to the mass specific capacitance of 154.26 F/g. This is due to the obvious redox reaction in sulfuric acid solution Notably, density functional theory (DFT) calculation was executed to investigate the capacitive behavior and mechanism of the Mo 2 CT x film electrode in the three different electrolytes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2013
·
IF 3.498
Xinjian Song,Bing Wang,Yina Huang,Liqing Li,Ting Li,Chunya Li,Shenghui Zhang
A polymeric film modified glassy carbon electrode was electrochemically fabricated with potential step technique using 1-butyl-3-[3-(N-pyrrole)propyl] imidazolium tetrafluoroborate ionic liquid as a monomer . Followed by being treated with sodium dodecyl sulfonate solution, a hydrophobic film bearing poly{1-butyl-3-[3-(N-pyrrolyl)propyl]imidazolium dodecyl sulfonate} moiety was modified onto electrode surface. The substitution was confirmed by X-ray photoelectron spectroscopy. The morphology of the polymeric film electrode surface was characterized with scanning electron microscopy. Electrochemical behaviors of magnolol at the hydrophobic polymeric film electrode were systematically investigated with voltammetry . Compared with the unmodified glassy carbon electrode, the oxidation peak shift slightly towards positive potential and the oxidation peak current significantly increased. Under optimal conditions, the oxidation peak current was linearly related to the magnolol concentration in the range of 1.0×10 –8 to 1.0×10 –6 mol L –1 and 1.0×10 –6 to 5.0×10 –5 mol L –1 . The detection limit was estimated to be 4.55×10 –9 mol L –1 (S/N=3). The polymerized ionic liquid film electrode was successfully used to analysis magnolol in M. officinalis . The result was consistent with that obtained by high performance liquid chromatography.
研究领域:
分析化学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2015
·Vol. 21
·期 9
·2567-2574
·
IF 1.754
Liu Guishen,Ma Yanhui,Hou Xiaodong,huang Yina,Chen Jianpeng,Zhan Guoqing,Li Chunya
1-[3-(N-Pyrrole)propyl]-3-[1-tert-butoxy-carbonylamino-propyl]imidazolium tetrafluoroborate ionic liquid was successfully synthesized and characterized. The ionic liquid was electrochemically polymerized onto a glassy carbon electrode surface using a multi-potential step technique. Morphology and electrochemical properties of the polymerized ionic liquid film electrode were studied with scanning electronic microscopy and electrochemical impedance spectroscopy. Using the polymerized ionic liquid film as a sensing platform, electrochemical behaviors of magnolol were investigated by voltammetry. Under optimal experimental conditions, the oxidation peak currents were linearly related to magnolol concentrations in the range from 5.0 × 10 −8 to 1.0 × 10 −5 mol L −1 . The detection limit calculated from the standard deviation of the intercept was 2.3 × 10 −7 mol L −1 . Practical application of the polymerized ionic liquid film electrode was demonstrated by determining magnolol in the traditional Chinese medicine. The result is consistent with that obtained using high performance liquid chromatography.
Polymerized ionic liquid film electrode fabricated with potential step technique and application in voltammetric sensing of magnolol
研究领域:
分析化学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Xuheng Li,Chunli Wang,Feng Liu,Zhihao Zhang,Jafar Ali,Qingwen Long,Jing Zhang
Electrochemical reduction and treatment of Cr(VI)-contaminated wastewater normally suffer from a high overpotential, due to the extravagant consumption of electrons by the adverse reactions of hydrogen evolution and oxygen reduction. In this work, the MoS 2 film electrode prepared by electrochemical deposition-annealing method was applied into the electrochemical reduction of Cr(VI), with the aim to suppress the over-potential of the reduction and improve the utilization of electrons. Results demonstrated that the 2H/1T′ heterostructure of MoS 2 enhanced the reduction efficiency of Cr(VI) up to 99% at a lower potential of −1.0 V vs. Ag/AgCl. The in-situ electrochemically generated hydrogen peroxide was found to play a critical role in accelerating the reduction of Cr(VI). Selective oxygen reduction reaction (ORR) via a two-electron pathway on the MoS 2 cathode was responsible for the formation of hydrogen peroxide, where the MoS 2 film electrode annealed at 700 °C can obtain a high productivity of 360 μM hydrogen peroxide within 60 min. The plenty of preserved interfaces between 2H and 1 T′ in the heterophase MoS 2 were crucial to the selective electrocatalytic activity. In addition, this electrode also presented an excellent electrocatalytic activity in hydrogen evolution reaction (HER), which could form atomic hydrogen on the surface of cathode to facilitate the reduction of Cr(VI) under the anoxic condition. This study paves a novel pathway to in-situ deposit the MoS 2 film electrode for the sustainable electrochemical reduction and treatment of Cr(VI)-containing wastewater.
研究领域:
环境科学
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电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）