发布求助
文献互助 智能选刊 最新文献

Electrochemistry eJournal最新文献

筛选
英文 中文
Oxygen Vacancies in Zirconium Oxide as the Blue Luminescence Centers and Traps Responsible for Charge Transport 氧化锆中氧空位作为电荷输运的蓝色发光中心和陷阱
Electrochemistry eJournal Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3582138
D. Islamov, V. Gritsenko, T. Perevalov, V. Aliev, A. Yelisseyev, V. Pustovarov, V. Nadolinny, E. Lomonova, A. Chin
{"title":"Oxygen Vacancies in Zirconium Oxide as the Blue Luminescence Centers and Traps Responsible for Charge Transport","authors":"D. Islamov, V. Gritsenko, T. Perevalov, V. Aliev, A. Yelisseyev, V. Pustovarov, V. Nadolinny, E. Lomonova, A. Chin","doi":"10.2139/ssrn.3582138","DOIUrl":"https://doi.org/10.2139/ssrn.3582138","url":null,"abstract":"The origin of luminescence centres and traps of charge carriers in ZrO<sub>2</sub> was studied using Raman scattering, luminescence spectroscopy, charge transport and quantum-chemical calculation. After the X-ray irradiation of the ZrO<sub>2</sub> film, the EPR spectra from an interstitial oxygen and a negatively charged oxygen vacancy are observed. The 2.7 eV luminescence band and 5.2 eV absorption/luminescence excitation band are associated with an oxygen vacancy. Half of the Stokes shift in blue photoluminescence spectra is equal to the trap thermal activation energy 1.25 eV estimated from the charge transport experiment. Within quantum-chemical simulations and experiments on the extraction of minority carriers from silicon substrates, it was demonstrated that both electrons and holes can be trapped on oxygen vacancies in ZrO<sub>2</sub>. Hence, oxygen vacancies are supposed to operate as traps responsible for the blue luminescence band and charge transport in ZrO<sub>2</sub>.","PeriodicalId":412570,"journal":{"name":"Electrochemistry eJournal","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127883086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fabricating Nanostructured HoFeO 3 Perovskite for Lithium-Ion Battery Anodes via Co-Precipitation 共沉淀法制备锂离子电池负极用纳米hofeo3钙钛矿
Electrochemistry eJournal Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3882746
A. T. Nguyen, V. Phung, V. Mittova, H. Ngo, Thuan Ngoc Vo, My Linh Le Thi, V. Nguyen, I. Mittova, M. Le, Y. Ahn, I. Kim, Tuan Loi Nguyen
{"title":"Fabricating Nanostructured HoFeO 3 Perovskite for Lithium-Ion Battery Anodes via Co-Precipitation","authors":"A. T. Nguyen, V. Phung, V. Mittova, H. Ngo, Thuan Ngoc Vo, My Linh Le Thi, V. Nguyen, I. Mittova, M. Le, Y. Ahn, I. Kim, Tuan Loi Nguyen","doi":"10.2139/ssrn.3882746","DOIUrl":"https://doi.org/10.2139/ssrn.3882746","url":null,"abstract":"Nanostructured HoFeO3 perovskite was successfully prepared via co-precipitation of Fe3+ and Ho3+ ions in ethanol, followed by heat treatment. Analysis revealed the orthorhombic structure, uniaxial orientation, and nanograin size. This anode material exhibited excellent electrochemical properties in lithium-ion batteries including high capacity retention and Coulombic efficiency, good cyclability, low charge transfer, high Li+ diffusion coefficient, and excellent rate performance. They delivered reversible capacity of 437 mAh g-1 after 120 cycles at current density of 0.1 A g-1, a charge capacity of 299 mAh g-1 even at high current density of 10 A g-1. Outstanding performance can be ascribed to unique nanostructured perovskite. Nanosized materials offer a larger electrode/electrolyte interface, and reduce Li-ion diffusion length, improving reaction kinetics. Perovskite structure effectively prevented anode degradation during cycling, demonstrating excellent reversible storage. Kinetics of electrochemical reactions were also studied. All indicate the great potential of HoFeO3 perovskite as an anode material in LIBs.","PeriodicalId":412570,"journal":{"name":"Electrochemistry eJournal","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122822576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Sandwich−Based Immunosensor for Electrochemical and Fluorescent Detection of F17-Positive Escherichia Coli and its F17A Fimbrial Protein 基于三明治的电化学和荧光检测f17阳性大肠杆菌及其F17A边缘蛋白的免疫传感器
Electrochemistry eJournal Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3929281
Imed Salhi, Amal Rabti, Asma Dhehibi, N. Raouafi
{"title":"Sandwich−Based Immunosensor for Electrochemical and Fluorescent Detection of F17-Positive Escherichia Coli and its F17A Fimbrial Protein","authors":"Imed Salhi, Amal Rabti, Asma Dhehibi, N. Raouafi","doi":"10.2139/ssrn.3929281","DOIUrl":"https://doi.org/10.2139/ssrn.3929281","url":null,"abstract":"F17A protein, the major subunit of F17 fimbriae, is one of the most prevalent and crucial virulence factors among the pathogenic Escherichia coli ( E. coli ) isolated from diarrheic and septicemic animals of various species. Purification and detection of this protein is regarded as an interesting field of investigation due to its important role as a therapeutic target, such as vaccines, and as a diagnostic tool. In this context, polyclonal rabbit antibodies recognizing F17A protein were developed and validated by indirect enzyme-linked immunosorbent assay and Western blot. Moreover, sandwich biosensor using anti−F17A/gold nanoparticles conjugate as capture probe and anti−F17A antibody labelled with horseradish peroxidase (HRP) as signal amplification probe was developed for electrochemical and fluorescent detection of purified F17A protein and live E. coli bacteria positive for F17. Good specificity and sensitivity for detection of E. coli strains positive for F17 were obtained with a lower detection limit of 37 CFU/mL.","PeriodicalId":412570,"journal":{"name":"Electrochemistry eJournal","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121965254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrodeposition of Bulk Nanocrystalline Ni-Fe-P Alloys and Their Mechanical and Soft Magnetic Properties 大块纳米晶Ni-Fe-P合金的电沉积及其力学和软磁性能
Electrochemistry eJournal Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3563938
I. Matsui, N. Omura
{"title":"Electrodeposition of Bulk Nanocrystalline Ni-Fe-P Alloys and Their Mechanical and Soft Magnetic Properties","authors":"I. Matsui, N. Omura","doi":"10.2139/ssrn.3563938","DOIUrl":"https://doi.org/10.2139/ssrn.3563938","url":null,"abstract":"Electrodeposited Ni-Fe alloys are expected to have an improved mechanical strength because of their nanocrystalline structure. However, unsatisfactory grain refinement yields a higher coercivity compared with conventional permalloys, which is undesirable in soft magnetic materials. We report electrodeposited Ni-Fe-P alloys that combine the mechanical properties of nanocrystalline materials with soft magnetism that is achievable in coarse-grained permalloys. Up to 2.0 at% P, the resultant Ni-Fe-P alloys achieved a tensile strength of 2.1 GPa, along with a plastic deformability. The electrodeposited alloys exhibited a saturation magnetic flux density of 1.1 T and a coercivity of 8.4 A/m. Our approach indicates that graine refinement by the P alloying can result in a lower coercivity, according to the law of the grain size and coercivity.","PeriodicalId":412570,"journal":{"name":"Electrochemistry eJournal","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115007251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Pathways of N-Doped Carbon Materials Active Sites During Oxygen Reduction Reaction 氧还原反应中n掺杂碳材料活性位点的路径研究
Electrochemistry eJournal Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3926130
J. Quílez‐Bermejo, E. Morallón, D. Cazorla-Amorós
{"title":"On the Pathways of N-Doped Carbon Materials Active Sites During Oxygen Reduction Reaction","authors":"J. Quílez‐Bermejo, E. Morallón, D. Cazorla-Amorós","doi":"10.2139/ssrn.3926130","DOIUrl":"https://doi.org/10.2139/ssrn.3926130","url":null,"abstract":"N-doped carbon materials have been considered as one of the most promising options for the replacement of platinum-based electrocatalysts towards the oxygen reduction reaction. However, what is known about this kind of catalysts and the identification of the active sites is still contradictory. Most of the scientific literature focuses on experimental characterization before ORR testing, leading to a consistent lack of knowledge about the surface chemistry at operando conditions. The development of operando techniques is, up to now, not enough to unravel with accuracy the reasons why these catalysts are as active as platinum-based electrodes and to understand the deactivation with time of use. In this work, the changes occurring in the active sites of N-doped carbon catalysts have been analysed in detail through pre- and post-ORR extended characterization of selectively N-doped carbon materials, along with sophisticated computational modelling.","PeriodicalId":412570,"journal":{"name":"Electrochemistry eJournal","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132023794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical Oxidation Assisted with the 1,3-Dipolar Cycloaddition for the Synthesis of the New Substituted Triazole 电化学氧化辅助1,3-偶极环加成合成新取代三唑
Electrochemistry eJournal Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3932110
Sadegh Khazalpour, Maryam Mehrdadian, A. Amani
{"title":"Electrochemical Oxidation Assisted with the 1,3-Dipolar Cycloaddition for the Synthesis of the New Substituted Triazole","authors":"Sadegh Khazalpour, Maryam Mehrdadian, A. Amani","doi":"10.2139/ssrn.3932110","DOIUrl":"https://doi.org/10.2139/ssrn.3932110","url":null,"abstract":"The electrochemical reaction of 4-ethynylaniline ( 4-EA ) in the present of sodium azide in buffered solutions with the various pHs (buffer solution /acetonitrile (80/20 v/v)) was investigated for the first time. Our electrochemical data assert that the product of oxidation of 4-ethynylaniline enter in the chemical reaction with azide ion. In continues, after the 1,3 dipolar cycloaddition, electrochemical oxidation, dimerization and third step electrochemical oxidation a triazole ring was produced as a desired product in a simple undivided cell and using carbon anode. The critical aim in this study was applying a non-catalytic procedure for the synthesis of triazole ring in the room temperature that successfully achieved.","PeriodicalId":412570,"journal":{"name":"Electrochemistry eJournal","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132347531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信