CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hao Jiang,Lizhang Wang,Bai Gao,Yiran Li,Yadan Guo,Mengning Zhuo,Kaixuan Sun,Binyu Lu,Meiyu Jia,Xiaoxia Yu,Huidong Wang,Yongge Li
In order to achieve high energy-conversion efficiency during CO 2 electro-conversion, OH − oxidation was employed as a counter reaction vs . CO 2 electroreduction for formate production on a Tin cathode. The formate faradic efficiency (FE) and production rate were 80.54% and 0.1549 mmol h −1 cm −2 using KOH anolyte at −1.80 V vs . SCE in 8 h operation, which were about 13.71% and 53.03% higher than that for KHSO 4 anolyte, respectively. This is mainly due to alkaline anolyte is beneficial to stabilize the catholyte pH, thus avoiding the competitive hydrogen evolution reaction, while maintaining fast electron transfer rate for the formation of CO 2* − . Moreover, KOH anolyte achieved the lowest power consumption (4.81 kWh kg −1 formate) compared with KHCO 3 and KHSO 4 . Polarization and electrochemical impedance spectroscopy measurements indicated that such energy-saving performance enhancement originated from low equilibrium potential and fast oxidation kinetics associated with the conversion of OH − to H 2 O, which reduced the anode potential and cell voltage. This study puts forward another insight for cost-effective CO 2 reduction, which is of great value to improve the balance of energy input and output during CO 2 conversion, thus having implication in enriching strategy in the field of electroreduction.
研究领域:
化学工程
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 23
·7894
·
IF 4.6
Jia-Bin Xiong,Yong-Juan Zhou,Shi-Hui Wang,Zhang-Qi Xiong,Zi-Kun Zhang,Shan-Shan Zhang,Chen-Kunlun Zhang,Chao-Fan Xu,Guo-Qun Liu
MOF (metal organic framework) materials have been used as functional materials in a number of fields due to their diverse spatial tunability, which produces rich porous structures with stable and continuous pores and a high specific surface area. A triboelectric nanogenerator can convert trace mechanical energy into electrical energy, and the application of MOF materials to triboelectric nanogenerators has been intensively studied. In this work, we report on two MOFs with similar spatial structures, and the modulation of the end microstructures was achieved using the difference in F content. The output performance of friction power generation increases with the increase in F content, and the obtained polyacidic ligand materials can be used to construct self-powered corrosion protection systems, which can effectively protect metallic materials from corrosion.Keywords:TENG;MOF;corrosion protection;cathodic protection
研究领域:
材料科学
·
能量转换
·
腐蚀工程
✓ 已验证
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 44
·2202253
·
IF 29.698
Zhenjie Cheng,Longfei Guo,Qingyu Dong,Chunting Wang,Qian Yao,Xin Gu,Jian Yang,Yitai Qian
Dual-ion batteries have shown promising prospect in energy storage, owing to their low material costs, high power capability, and environmental friendliness. However, graphite as the cathode always suffers from structural damage and electrode/electrolyte interface instability, which greatly deteriorate their electrochemical performance. Here, tris(trimethyl-silyl) phosphite (TMSP) is added as an electrolyte additive to improve the electrochemical performance. TMSP not only scavenges the deleterious species generated by electrolytes, but also produces a thin and uniform cathode–electrolyte interphase layer on graphite. Hence, the electrochemical performance is greatly promoted. In graphite||graphite, the capacity retention is ≈96.8% at 30 °C or 92.5% after 3000 cycles in the presence of TMSP, much better than those without TMSP (62% at 30 °C or 27% after 200 cycles).
研究领域:
电化学
·
能源材料
·
储能技术
·
先进电池
·
界面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Shaolong Li,Zepeng Lv,Jilin He,Jianxun Song
ZrC x O y with composition ZrC 0.79 O 0.21 were synthesized through the carboreduction of ZrO 2 in this paper. Subsequently, these ZrC x O y blocks obtained through reaction sintering were directly subjected in a graphite crucible as an anode for electrolysis preparation of metallic zirconium in NaCl-KCl melt. The effects of applied voltage, fluoride ions, and initial zirconium ion content on anodic dissolution were studied, as well as the cathodic deposition. The results indicate that the valence state of zirconium ions dissolved into the molten salt from the anode will rise with the voltage increasing from 2.7 V to 3.1 V. In addition to voltage, both fluoride ions and initial zirconium ions have significant effects on the anodic dissolution of ZrC x O y and cathodic deposition of zirconium. The microstructure of cathodic deposition products also exhibits diversity with changes in electrolysis conditions. The experimental results supply evidence for the electrolysis of ZrC x O y obtained through reaction sintering as a consuming anode for the preparation of metallic zirconium, while also providing support for the optimization of electrolysis parameters.
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhangfa Huang,Zhijun Liu,Hua Hu,Jianxin Wang,Ming Chen,Baohua Cao,Qin Wang,Jun Yang,Wanbing Guan,Tongxiang Liang
Aiming to lower the operating temperature of solid oxide fuel cells down to 500–700 °C, a Co-containing composite cathode La 0.6 Sr 0.4 CoO 3-δ -Ce 0.85 Sm 0.075 Nd 0.075 O 2-δ (LSC-SNDC) is prepared by the solid-liquid method. The crystallinity, grain size and microstructure of LSC powders are analyzed by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The LSC-SNDC cathodes with different mass ratios (LSC: SNDC = 100:0, 90:10, 70:30, 60:40 and 50:50) are implemented into symmetrical cells and full cells using screen printing. The effect of cathode sintering temperatures (900, 950, 1000, 1050 °C) is investigated at the symmetrical cell level. The lowest cathode polarization resistance ( R p ) is obtained with the 50:50 sample sintered at 950 °C, demonstrating a R p (symmetrical cell) of 0.0248, 0.0319, 0.0597, 0.1107 and 0.2304 Ω cm 2 and a maximum power density (full cell) of 1963, 1535, 1013, 585, and 302 mW cm −2 at 800, 750, 700, 650 and 600 °C, respectively. The LSC-SNDC (50:50) cathode exhibits a low thermal expansion coefficient of 12.3 × 10 −6 K −1 and good compatibility with other cell components, as confirmed from SEM observations. The current work demonstrates that LSC-SNDC is a promising cathode material for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 12
·122503
·
IF 3.1
Yanhong Jia,Hong Zhang,Ahmet Burak Çubuk,Biao Wu,Shaoqiang Guo
A mesh-type assembly and stirrer assembly were developed to improve the performance of liquid cadmium cathodes for the electrodeposition of U and Ce from LiCl-KCl molten salt at 773 K. The thermodynamic basis for electrodepositing U and Ce was established through the calculation of equilibrium potentials and cyclic voltammograms, while also examining the co-deposition of Li. Thereafter, U and Ce electrodeposition was performed by galvanostatic electrolysis, and the current efficiency was determined. It was found that both assemblies effectively hampered the growth of U dendrites and Ce-Cd dendritic alloys. However, the utilization of the mesh-type assembly resulted in a greater current efficiency for U, with the maximum deposited amount attaining 7.7 wt% U/Cd without causing U dendrites formation. In contrast, the current efficiency for Ce was enhanced after using the stirrer assembly due to an improved diffusion flux of Ce ions. Finally, cathode deposits were characterized by scanning electron microscopy, energy-dispersive spectroscopy, and X-ray diffraction, which revealed that disrupted fine U dendrites were randomly scattered in the Cd bulk, and that the CeCd11 dendritic alloys were also damaged, leading to an increased atomic ratio of Ce to Cd at the Cd bottom.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2024
·
IF 2.9
Chenning Wang,Xiaoyu Zhou,Tianqi Jiang,Zhenrui Xu,Esmond A. Balfour,Hao Fu
The high content of Ba and Sc in Ba
$_{\text{3}}$
ScGa
$_{\text{2}}$
O
$_{\text{7.5}}$
and its suitable melting point suggest that it is a candidate for thermionic emission in vacuum electron devices. To study its electron emission capacity, this compound was synthesized at 1300
$^{\circ}$
C by a high-temperature solid-phase method with the stoichiometric mole ratio of BaCO
$_{\text{3}}$
:Sc
$_{\text{2}}$
O
$_{\text{3}}$
:Ga
$_{\text{2}}$
O
$_{\text{3}}$
$=$
6:1:2. The test cathode impregnated with this material had a high emission capacity with the full-space charge current density of 10.2 A/cm
$^{\text{2}}$
at 850
$^{\circ}$
C in the dc mode. The sintered mixture of the compound and tungsten powder reveals that the formation of Ba
$_{\text{3}}$
Sc
$_{\text{2}}$
WO
$_{\text{9}}$
on the cathode surface leads to reduced work function and thus enhanced emission performance. The titled compound is environmentally stable with a low weight gain percentage (4.51%) and a steady phase in the air for 288 h. Coupled with the high emission current density at low temperatures, the cathode impregnated with Ba
$_{\text{3}}$
ScGa
$_{\text{2}}$
O
$_{\text{7.5}}$
compound has superior thermionic cathode properties and promising applications in vacuum electron devices.
研究领域:
材料科学
·
真空电子学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 74
·39312-39315
·
IF 3.708
Yanqing Lai,Fuhua Yang,Zhian Zhang,Shaofeng Jiang,Jie Li
Porous hollow carbon spheres (PHCSs) with high surface area and large pore volume were synthesised using a facile template method. After selenium (Se) encapsulation, Se/PHCS composite was formed. The obtained Se/PHCS composite was demonstrated as a suitable cathode material for lithium–selenium batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jin Li,Xin Zhou,Congcong Wu,Li Zhao,Binghai Dong,Shimin Wang,Bo Chi
Challenged by the surface strontium (Sr) enrichment, long-term stability of the La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) cathode remains to be the most intractable problem hindering its further development and application in solid oxide fuel cells (SOFCs). To enhance the durability and performance of LSCF-based electrodes, we propose a novel approach by introducing a highly active A-site deficient La 0.95 CoO 3-δ (LC95) thin film onto the surface of the porous LSCF scaffold, simultaneously working as the accepter for Sr diffusion and conformal collector for electrons conduction. Besides the inhibiting effect from the dense coating, the A-site deficiencies reserved in coating lattice enable promising stabilization for Sr diffusion and segregation. At 700 °C, the La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ @La 0.95 CoO 3-δ (LSCF@LC95) hybrid cathode shows a polarization resistance of 0.28 Ωcm 2 , much lower than that for pristine LSCF cathode (0.36 Ωcm 2 ). In addition to the higher electrochemical activity, single cell with LSCF@LC95 cathode exhibits remarkable long-term stability without detectable degradation over 120 h.
研究领域:
材料科学
·
电化学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Xinbo Mao,Tian Yu,Guilin Ma
A novel series of cobalt-free cathode materials, NdBaFe 2− x Mn x O 5+ δ (0.0 ⩽ x ⩽ 0.3), are prepared by a citric acid–nitrate process. X-ray diffraction (XRD) analysis indicates that all the samples are double-perovskite phases with cubic structure. The conductivity dependence of the cathode materials on temperature (300–800 °C) and oxygen partial pressure (1–10 −10 atm) is investigated. Among the tested samples, NdBaFe 1.9 Mn 0.1 O 5+ δ (NBFM10) exhibits the highest conductivity of 114 S cm −1 in air at 550 °C. The H 2 /air fuel cell with the NBFM10–BZCY composite cathode and NiO–BZCY composite anode as well as BaZr 0.1 Ce 0.7 Y 0.2 O 3 − α (BZCY) electrolyte membrane (ca. 30 μm thickness) was assembled and tested at 500–700 °C. The peak power density of the cell reaches 453 mW cm −2 , and the interfacial polarization resistance R p is only 0.06 Ω cm 2 under open circuit conditions, at 700 °C.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Yuhua Dong,Xueyan Du,Yutong Xie,Kexin Wu,Qiong Zhou
A quaternary composite of Ti 3 C 2 /TiO 2 /TiN/polyaniline was synthesized by doping TiN nanoparticles on the calcined Ti 3 C 2 MXene nanosheets , and then polyaniline was deposited through chemical oxidation . The bandgap and flat band potential of composite were determined by X-ray diffraction and ultraviolet–visible spectroscopy. In order to prepare photoanode and photocathodic protective coating, the quaternary composite was added to the polyvinyl alcohol solution and epoxy resin to. Photoelectrochemical results indicated that photoanode and relevant photocathodic protective coating had similar photocurrent with about 5 μA cm −2 , but open circuit potential of the photocathodic protective coating was more negative than that of photoanode. The R ct of photoanode with illumination was 5.5 kΩ, while that of photocathodic coating was 136 kΩ. The 304 stainless steel could be well protected by the photoanode and photocathodic protective coating whether illumination or not, due to synergistic effect of local surface plasmonic resonance of TiN, “electron pool” of polyaniline and non-interfacial contact of TiO 2 and MXene. Moreover, the epoxy resin in the photocathodic coating could act as a kind of physical barrier in the dark environment. Additionally, results of long-term protection test indicated that the photocathodic protective coating under intermittent illumination had better protection property than that of the coating without illumination.
研究领域:
材料科学
·
电化学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiyang Li,Ziyuan Wang,Xia Qin,Cuicui Xu,Fanbin Zhang
In this study, Cu was embedded within a carbonaceous layer via a sol-gel method, and the cathode’s conductivity was optimized at different carbonization temperatures. A hydrophilic cathode (Cu 4 -Fe@CTS/Ni foam) was fabricated using a tablet compression method. This cathode was employed in a heterogeneous electro-Fenton system to degrade 200 mg/L of fulvic acid (FA), enabling an assessment of its electro-Fenton performance. After 3.5 hours of operation, the cathode achieved an 82% of Chemical oxygen demand (COD) removal and a 73% of Total organic carbon (TOC) removal with an exceptionally low energy consumption of 21.34 kWh/kg COD. This high efficiency was attributed to the absence of excessive Polytetrafluoroethylene (PTFE) in the electrode fabrication, which significantly enhanced direct contact between the electrode, reactants, and electrolyte. Water contact angle measurements confirmed that the electrode remained hydrophilic during electrolysis. Mechanistic insights into organic pollutant degradation under hydrophilic conditions were elucidated through multiple characterization techniques. Unlike conventional electro-Fenton cathodes that require substantial PTFE incorporation to form a hydrophobic layer and forced aeration to supply oxygen for H₂O₂ generation, this cathode directly utilized dissolved oxygen in water to produce H₂O₂ under non-aerated conditions. The hydroxyl radicals responsible for organic pollutant degradation were catalytically generated by low-valence transition metals immobilized on the cathode surface. After five consecutive cycles, the degradation efficiency exhibited only a slight decline to 72%. These findings highlight the potential of this approach in advancing the practical application of heterogeneous electro-Fenton technology.
研究领域:
环境工程
·
电化学
·
水处理
·
材料科学
·
化学技术
✓ 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）