ELECTROCHEMISTRY
·
2019
·Vol. 87
·期 4
·214-219
·
IF 1.293
Jianhong LU,Mingyong WANG,Xiaomei DENG,Jianhei YAN,Jimmy YUN,Shuqiang JIAO
Potassium ferricyanide (K3Fe(CN)6) as a stabilizer was used for electroless copper plating in EDTA/THPED dual-ligands system. The deposition behavior and surface structure of copper layer were studied systematically. The results indicated that the overall deposition process was divided into three regions designated as induction, transitional and stable regions. It was confirmed that K3Fe(CN)6 can delay the fall-off trend of electrode potential, which may be related to the competitive adsorption between Fe(CN)63− with large radius and OH− with small radius on the electrode surface. The addition of K3Fe(CN)6 led to a decrease of 70% in redox current density, which reduced obviously Cu deposition rate. Meanwhile, the decomposition time of electroless solution sharply increased and the reoxidation of Cu(I) ion was effectively inhibited in the presence of K3Fe(CN)6. Metallographic studies of copper layers with and without K3Fe(CN)6 stabilizer revealed that surface structures and fine particle distribution were uniform. The resultant product was high-purity without detectable iron impurities. Moreover, the addition of K3Fe(CN)6 was favorable to the formation of the preferred orientation on (220) crystal plane, and the grain size decreased from 61.5 nm to 40.4 nm with the addition of 50 mg L−1 K3Fe(CN)6.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 5
·1-9
·
IF 2.8
Zhang Xiaochen,Zhang Zijian,Zhang Xueqi,Sun Haiquan,Hu Quan,Wang Haibao
Shuttle-like vanadium selenide was prepared via carbonizing the vanadium-based metal organic frameworks for supercapacitors. Its morphology and structure were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and N 2 adsorption–desorption isotherm. Its electrochemical performance was investigated by cyclic voltammetry and galvanostatic charge–discharge test in three electrode configurations for supercapacitor. Compared with those in pure KOH electrolyte, the supercapacitive performances can be greatly enhanced when adding a certain amount of K 3 Fe(CN) 6 in KOH. A high specific capacitance of 512 F g −1 can be achieved at a scan rate of 0.2 mV −1 in 1 M KOH + 0.02 M K 3 Fe(CN) 6 , while only 164 F g −1 can be obtained in pure 1 KOH electrolyte. Furthermore, the VSe 2 also exhibits stable long-term cycling, 84.7% capacitance retention after 6500 cycles at a current density of 2 A g −1 . Those results provide a facile yet effective method for high performance energy storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2018
·
IF 0
De Gao,Rui Du,Chenggang Zhou,Bo Han,Kaisheng Xia,Qiang Gao,Jinping Wu
Transition metal cyanides are considered as a promising cathode candidate of sodium-ion batteries. Herein, we reported a direct implementation of commercial K 3 Fe(CN) 6 (KFC) as active cathode material of SIBs by a simple recrystallization method. Our results suggest that by integrating conductive carbons (SuperP, abbreviated as SP) and multi-walled carbon nanotubes (CNTs) with KFC, an efficient conducting network could be well established for the utilization of KFC active components, thereby endows excellent cyclic and rate performances. Specifically, the KFC/SP/CNTs composite delivers its theoretical capacity of 81 mAh g −1 at 0.1C, and a reversible capacity of 75.6 mAh g −1 at 1C which maintains 62.6 mAh g −1 after 500 cycles. At ultrahigh rate of 12C, the capacity retention can reach 68% of initial. Our effort suggests that direct implementing industrial KFC as cathode materials for SIBs is highly feasible, which may provide a low-cost cathode candidate of sodium-ion batteries for large-scale energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Yasin Orooji,Mahsa Haddad Irani-nezhad,Ramin Hassandoost,Alireza Khataee,Shima Rahim Pouran,Sang Woo Joo
Cerium doped magnetite nanoparticle (CDM) was synthesized via a co-precipitation method and used as the co-reactant of luminol-K 3 Fe(CN) 6 chemiluminescent system. The physical-chemical features of CDM were studied by XPS , XRD, HRTEM , FESEM , VSM, BET, and FTIR analyses. This simple and highly sensitive nanoprobe enabled the determination of minor concentrations of metronidazole (MNZ). Owing to the quenching efficacy of MNZ in the studied chemiluminescence system, a linear range of 3.47 × 10 −6 -9.37 × 10 −5 mol/L was obtained with a limit of detection of 3.91 × 10 −7 mol/L. This biosensor was used for MNZ detection in human serum samples, which was highly efficient. The outcomes of this study give credit to the proposed biosensor to be applied for detection of MNZ in biological samples.
研究领域:
分析化学
·
生物传感
·
药物检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shouze Li,Zhou Li,Dongyan Xu,Run Hu
Emerging thermocells exhibit a significant potential in low-grade heat harvesting owe to their high mV-scale thermopower, low cost, and high robustness. Fundamentally, three effects contribute to the thermopower enhancement of liquid thermocells, i.e. original concentration effect, solvation effect, and normalized concentration gradient effect. Yet, the contribution of the solvation effects and the normalized concentration gradient in organic solvents remains a subject of debate. In this paper, we integrate experiments, spectral analysis, and electrochemical theory to demonstrate that the normalized concentration gradient dominates the enhancement of thermopower in the investigated organic solvents, whereas the solvation effect is weak. Further, the introduction of ethanol results in a thermosensitive solubility of K 4 Fe(CN) 6 and a minimal concentration at the cold end, which establishes a huge substantial normalized Fe(CN) 6 4- concentration gradient and increases the Seebeck coefficient to 3.4 mV/K. Simultaneously, the precipitation resulting from the introduction of an organic solvent notably diminishes the heat convection within the system. As a result, the optimized TC-35EtOH system yields a ZT value (0.094) and Carnot-relative efficiency (2.52 %) that are 7 times greater than those of its initial counterpart. Additionally, the system’s high power density of 3.64 W/m 2 suggests its potential for harnessing low-grade heat waste energy.
研究领域:
物理化学
·
能源材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）