JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 22
·17814-17827
·
IF 2.779
Liu Zhuofeng,Liang Wenxue,Zhang Weijun,Wang Fenglin,Xun Yan,Chen Tongting,Li Wei,Chen Xingyu,Mao Haijun
The co-firing compatibility between green tape and the Ag electrode is a crucial characteristic in low-temperature co-fired ceramic (LTCC) technology and plays a vital role in improving the performance and application status of LTCC device modules. In this work, we studied the effects of lead content on the glass viscosity, the microstructure, and co-firing compatibility of silver electrode film. It was found that the softening point and viscosity of the glass were decreased, and the wettability between the glass and silver was improved with the increase of the lead content, which promoted the co-firing densification and interfacial bonding between the silver electrode film and the ceramic layer. The film presented the best electrical properties co-firing at 875 °C for 15 min, with the resistivity of 1.21 mΩ/sq. And the film was densified. The sintering interface was clear and well bonded. The results showed that an appropriate lead content in glass could effectively improve the interfacial bonding and the electrical properties during co-fired process, providing a new control methodology for realizing co-fired matching of the silver electrode film with low-temperature co-fired ceramics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2011
·
IF 2.733
Ying Hua Xu,Hong Zhang,Cheng Pu Chu,Chun An Ma
Chloroacetic acids (CAAs, including trichloroacetic acid, dichloroacetic acid and monochloroacetic acid) are byproducts formed upon the addition of chlorine to water for disinfection purpose and they pose a potential human health risk. To catalyze the dechlorination of CAAs, an activated silver electrode was prepared by an oxidation–reduction cycle process. Surface structure and roughness factor of the activated silver electrode and its catalytic activity (including stability) towards the dechlorination of CAAs in aqueous solutions of different pH were studied by SEM, underpotential deposition (UPD) method, cyclic voltammetry (CV) and controlled-current electrolysis, respectively. Experimental evidence is presented that the activated silver electrode, having a porous surface with a roughness factor of approx. 63.9, is an excellent electrocatalytic material for direct dechlorination of CAAs and the complete dechlorination of trichloroacetic acid to safe acetic acid with excellent current efficiency (near 95%) can be successfully achieved by using this peculiar electrode in alkaline aqueous solutions. The reduction of trichloroacetic acid in a stepwise dechlorination fashion was suggested and trichloroacetic acid (TCAA) → dichloroacetic acid (DCAA) → monochloroacetic acid (MCAA) → acetic acid (AA) probably is the main reductive reaction route independent of pH.
研究领域:
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 16
·13496-13502
·
IF 2.22
Fang Weishuang,Ao Laiyuan,Tang Ying,Li Jie,Xiang Huaicheng,Zhang Zhiwei,Du Qianbiao,Fang Liang
Recently, there have been considerable interests in the Li-containing spinel oxides as promising microwave dielectric materials. Li loss at elevated temperatures, however, is known to be inevitable, resulting in deterioration on dielectric performances. Here the influence of Li nonstoichiometry on the microwave dielectric properties of Li 2 ZnGe 3 O 8 , a spinel oxide, was reported. An appropriate level of Li excess enhanced the densification of Li 2 ZnGe 3 O 8 and increased dielectric performances. In contrast, high level of Li excess induced the formation of the secondary phase of Li 2 ZnGeO 4 confirmed by XRD and Raman spectra, which in turn lowered the dielectric properties. Typically, a composition with x = 0.075, in the Li 2(1+ x ) ZnGe 3 O 8 ceramics exhibited the enhanced microwave dielectric properties with ε r = 10.68, Q × f = 77,300 GHz (at 13.3 GHz), and τ f = − 70.35 ppm/°C when sintered at 940 °C for 4 h. Moreover, these compounds have well chemical compatibility with the silver electrodes.
研究领域:
材料科学
·
陶瓷学
·
电子材料
✓ 已验证
DOI
高影响因子
Royal Society Open Science
·
2020
·Vol. 7
·期 1
·
IF 2.646
Tianrui Chen,Hui Yang,Shengchi Bai,Yan Zhang,Xingzhong Guo
With polyol-synthesized silver nanoparticles (AgNPs) as raw materials, the silver electrodes with high conductivity were fabricated via a dip-coating method followed by sintering process, and the effects of the dip-coating and sintering process on the conductivity and surface roughness of silver electrodes were investigated in detail. The silver film with a thickness of 1.97 µm and a roughness of about 2 nm can be prepared after dip-coating at a pulling rate of 500 µm s−1 for 40 coating times. The non-conductive dip-coated silver films are transformed into conductive silver electrodes after conventional sintering in a muffle oven, infrared sintering and microwave sintering, respectively. Compared with high sintering temperature and long sintering time of conventional sintering and infrared sintering, microwave sintering can achieve quick sintering of silver films to fabricate high conductive silver electrodes. The silver electrodes with a sheet resistance of 0.75 Ω sq−1 and a surface roughness of less than 1 nm can be obtained after microwave sintering at 500 W for 50 s. The adjustable dip-coating method followed by quick microware sintering is an appropriate approach to prepare high conductive AgNPs-based electrodes for organic light-emitting diodes or other devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Dong-Fang Li,Jin-Chuan Mao,De-Li Chen,Fang Chen,Hong Ze-Wen,Xiao-Yi Zhou,Ya-Hao Wang,Xiao-Shun Zhou,Zhen-Jiang Niu,Emmanuel Maisonhaute
The single-molecule conductance of 1,4-dicyanobenzene (DCB), 1,4-benzenediamine (BDA) and 4,4'-biphenyldicarbonitrile (BPDC) with Ag and/or Cu electrodes is measured by electrochemical jump-to-contact STM-break junction. All single-molecule junctions present three sets of conductance values revealing different contact geometries. We observe that the single-molecule conductance of Ag-BDA-Ag junction is larger that of Ag-DCB-Ag junction, and DCB with Ag contacts are more conductive than that with Cu ones. This is related to a different electronic coupling between the molecules and the electrodes. Tunneling decay constants of 1.70 and 1.68 per phenyl group were found for Ag and Cu electrodes, respectively. The present study therefore shows that nitrile and amino groups can also be used as effective anchors for other metals than gold.
研究领域:
物理化学
·
纳米科技
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Qiu Jianping,Tang Juntao,Shen Jie,Wu Cuiwei,Qian Mengqian,He Zhiqiao,Chen Jianmeng,Shuang Song
An Ag electrode was surface-modified by ozonation and subsequent electroreduction. The modified electrode was more active and selective than its smooth-surfaced counterpart in reducing CO 2 to CO. Surface modification facilitated the formation of a three-dimensional structure on the Ag surface, thereby enlarging the number of reactive species available for CO 2 electroreduction. Moreover, the modified Ag electrode retained durable activity using potentiostatic pulse electrolysis. The main carbon-containing substances produced were large amounts of CO accompanied with relatively low quantities of formic acid, methanol, methane and formaldehyde. On the basis of Tafel plots and the addition of known products, it is proposed that the electroreduction of CO 2 on the Ag electrode proceeds via a mechanism involving generation of CO and HCOOH. The Ag electrode deactivation was caused by CHO ads and/or COH ads absorbed species on the Ag surface.
研究领域:
材料科学
·
环境科学
·
电化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 9
·096505
·
IF 3.1
Zhefei Zhao,Linlin Zhang,Minghao Chen,Ruopeng Yu,Xuyao Yao,Yinghua Xu,Youqun Chu,Xinbiao Mao,Huajun Zheng
Electrochemical selective dechlorination can be regarded as one of the most promising strategies for generating high-valued chemicals. In the electrochemical dechlorination process of 2-chloro-5-trichloromethylpyridine (TCMP), except the anticipated dechlorination products involving 2-chloro-5-dichloromethylpyridine (DCMP), 2-chloro-5-chloromethylpyridine (CCMP), and 2-chloro-5-methylpyridine (CMP), some unexpected oxygen-incorporated products (6-chloronicotinic acid (CNA) and 6-chloronicotinoyl methyl ester (MCN)) can be obtained. Consequently, understanding the electrochemical dechlorination behavior of TCMP is crucial. Our research revealed that the activated Ag electrodes in halide ion solution exhibit enhanced electrochemical activities for electrochemical dechlorination of TCMP, compared with the pure Ag owing to the increased active specific surface areas and charge transfer. Second, oxygen participation in the reaction is a necessary condition for the formation of oxygen-incorporated products. A 100% selectivity of oxygen-incorporated products can be obtained at the potential of −0.6 V vs Ag/AgCl. Conversely, insufficient oxygen may lead to the potential becoming the determining condition that affects the reaction pathways. A more negative potential (−1.2 V vs Ag/AgCl) is conducive to the formation of dechlorination products with 94.2% conversion and 100% selectivity. This study, for the first time, elucidates the electrocatalyst, atmosphere, and potential-dependent activity and selectivity for the two dechlorination pathways of TCMP.
研究领域:
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2022
·
IF 8.634
Naveed Ahmad,Ying Chen,Xiaoxiao Wang,Peixu Sun,Yuting Bao,Xia Xu
Electrochemical CO 2 reduction reaction (ECO 2 RR) offers an eco-friendly way to produce value-added products by utilizing the waste CO 2 from the environment. Recently, amines have been utilized as electrolytes for direct conversion of CO 2 but processes were energy-intensive and lack selectivity due to the formation of highly stable carbamate. 2-amino-2-methyl-1-propanol (AMP) is a sterically hindered amine , produces less stable carbamate, and generates more HCO 3 − . Herein, ECO 2 RR performance using AMP aqueous solution as electrolyte was investigated over Ag, Cu, and Zn metal electrodes. Ultimately, 91 ± 7% CO selectivity on HCl modified polycrystalline Ag electrode at −0.91 V vs RHE in 1 M AMP aqueous solution in the presence of CTAB was achieved, 1.7 times greater than in 1 M aqueous ethanolamine (MEA) solution. Synergetic effects of unstable AMP-carbamate, generation of nano-agglomerates on pitted/porous Ag surface arising from HCl treatment, and a compact electrical double layer due to CTAB present are responsible for the high selectivity of CO. Our findings provide the understanding of electrode-electrolyte interactions and offer a facile strategy to directly convert CO 2 to CO from CO 2 capture solutions.
研究领域:
环境科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 8
·期 1
·69-76
·
IF 10.733
Xueshi Jiang,Lulu Sun,Wen Wang,Fei Qin,Cong Xie,Lin Hu,Yinhua Zhou
In this study, we report 10 cm2 nonfullerene solar cells with power conversion efficiency of 10.24%. The demonstration of the large-area cells is based on the HxMoO3-assisted growth of two silver electrodes, namely, the ultrathin-transparent electrode (on the top) and opaque electrode (at the bottom). The device structure has the configuration glass/HxMoO3/opaque Ag (70 nm)/active layer/HxMoO3/ultrathin Ag (8 nm)/MoO3. The chemically reactive HxMoO3 could react with silver oxide during the growth of the initial few nanometers of silver, as inferred from X-ray spectroscopy measurements. The reaction increases the nucleus sites that assist the continuous and uniform growth of the silver films. The percolation threshold thickness of conductive ultrathin Ag films on HxMoO3 can be as low as 4 nm. The root-mean-square surface roughness of opaque silver (70 nm) grown on the HxMoO3 surface is as low as 1.06 nm. HxMoO3 facilitates the growth of uniform, continuous and smooth silver films that enable the efficient large-area nonfullerene organic solar cells.
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
高影响因子
Flexible and Printed Electronics
·
2021
·Vol. 6
·期 4
·045007
·
IF 3.588
Feng-Jie Yan,Wan-Qing Huang,Xu-Hui Sang,Jun-Ge Liang,Xi Wan,Feng Shao,Xiao-Feng Gu
To practice the development of printed electronics, researchers need to have the access to dedicated printer of electronic materials. However, commercial printing machines require large capital investment. Direct ink write (DIW) printing on the other hand operates with single printing head and less complex system therefore is promising for tight budget projects. Herein, a DIW printing system was home-built by making modifications to a 3D printer with ready to use components. Direct pattering and minimal printing line width of 230 ± 10 µm are demonstrated using an all solution-based Ag ink. Resistive-type humidity sensors were fabricated with DIW printed Ag electrodes and poly (diallyl dimethyl ammonium chloride) (PDDA) sensing layer. Humidity sensing performance of the sensors were examined and by taking advantage the flexibility of printing deposition, DIW printing was used to make quick modification toward a partially covered sensor structure for improved performance. Sensing response of more than 99% was obtained from 10% RH to 90% RH. Smaller hysteresis of ±4.4% RH and faster response of 7 s for adsorption and 213 s for desorption were obtained with the partially covered sensor. DIW printing is found to be a useful tool for device prototyping and ink development of printed electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2017
·Vol. 33
·期 5
·799-803
·
IF 1.024
Cui Wenyu,Fan Lishuang,Geng Lin,An Maozhong,Zhang Fujun
The use of a digital versatile disc(DVD)-based Ag electrode for the square-wave anodic stripping voltammetric determination of Pb 2+ and Cd 2+ was described. The effect of I – on the stripping analysis of Pb 2+ and Cd 2+ at Ag electrodes was first studied. I – significantly improved the stripping peaks of both Pb 2+ and Cd 2+ . The square-wave voltammetric stripping response was linear over 5―50 μg/L for Pb 2+ and Cd 2+ with a deposition time of 118 s. The detection limits were 0.2 and 2.6 μg/L for Pb 2+ and Cd 2+ , respectively. The high sensitivity, selectivity, and stability of this DVD-based Ag electrode enabled its practical application for simple, rapid and economical determination of trace levels of Cd 2+ and Pb 2+ in tap water samples. In addition, detection can be achieved without sample deoxygenation and the electrode can be easily manufactured.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Youqun Chu,Xinhang Wang,Lingqiao Wang,Zhaoyang Chen,Yinghong Zhu,Fengming Zhao
A novel approach has been designed using trichloroacetic acid as etching molecule to prepare a highly activated self-supporting porous silver electrode for electrochemical detection of trichloroacetic acid. By analyzing the molecular structure, it contains three carbon-chlorine bonds, which can be controlled to form and break the silver-chlorine bonds. It is speculated that trichloroacetic acid molecules can be embed into micro-nano structures through Ag-Cl 3 CCOOH bonding, thus blocking the interface contact failure caused by excessive dissolution of AgCl and displaying the gate effect of imprinted trichloroacetic acid molecules. The performance of the electrochemical sensor constructed by trichloroacetic acid etching are significantly improved. Under the optimal conditions, the determination of TCA was performed with a linear range of 0.05 – 313.20 μmol·L −1 and a detection limit of 0.035 μmol·L −1 . The electrochemical sensor has good reproducibility and stability with relative standard deviations of 4.5% and 3%, respectively, and still achieve 95% of the initial current value after two weeks.
研究领域:
分析化学
·
电化学
✓ 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）