ECS Electrochemistry Letters最新文献

{"title":"An Approach to Measure the Water Breakthrough in Porous Carbon Materials","authors":"M. Schwager, S. Dhanushkodi, W. Mérida","doi":"10.1149/2.0071504EEL","DOIUrl":"https://doi.org/10.1149/2.0071504EEL","url":null,"abstract":"We report a new characterization method that detects liquid water breakthrough in porous materials by measuring changes in relative humidity and electrochemical impedance simultaneously. Unlike previous work based on capillary pressure, a four-chamber tool was developed to monitor the pressure and dew point temperature across porous transport layer materials. This approach can characterize the structure and water transport behavior of carbonaceous materials for polymer electrolyte fuel cells and electrolyzers. The changes in the dew point, impedance, and pressure provide a reliable and fast indicator to predict the liquid water breakthrough.","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0071504EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64328024","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}

{"title":"Mediator-Less Electrocatalytic Oxidation of NADH at Oxygen Plasma Treated Screen Printed Carbon Electrodes","authors":"S. Mutyala, J. Mathiyarasu","doi":"10.1149/2.0021512EEL","DOIUrl":"https://doi.org/10.1149/2.0021512EEL","url":null,"abstract":"","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0021512EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64308613","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}

{"title":"Impedance Biosensor Utilizing a Si Substrate Deposited by Wet Methods","authors":"B. Falola, R. Radhakrishnan, I. Suni","doi":"10.1149/2.0081507EEL","DOIUrl":"https://doi.org/10.1149/2.0081507EEL","url":null,"abstract":"We report an impedance biosensor utilizing a Si electrode created by wet chemical deposition atop 6061 Al alloy. The sensor electrode is created by galvanic/electroless Si deposition from an electrolyte containing 10 mM HF and 20 mM Na2SiF6 in 80 wt% formic acid, followed by antibody immobilization. The impedance response of the sensor electrode to increasing concentrations of peanut protein Ara h 1, a common food allergen, can be fit to an equivalent circuit containing three RC loops. The circuit element most sensitive to antigen binding is the charge transfer resistance, yielding a detection limit of 4 ng/mL. Biosensors that utilize electrochemical impedance spectroscopy have been employed with a wide variety of immobilized biomolecules, including antibodies, receptor proteins, aptamers, and ssDNA. These biomolecules must be immobilized atop a conductive and biocompatible substrate, which is most commonly accomplished by amide bond formation to carboxylate-terminated Au-thiol self-assembled monolayers. However, Au-thiol self-assembly chemistry has been reported to have inadequate stability for many applications, with a shelf life limited to days to weeks. In addition, most sensors need to be calibrated, which for antibodybased biosensors requires antibody unfolding. For this reason, durable chemistry for antibody immobilization is also needed for biosensor regeneration during such a calibration procedure. In addition to Au, other biocompatible substrate materials that have been employed for impedance biosensors include C, Si, Pt, Ti, and ITO. Si is intriguing as a biosensor substrate, since it is directly below C in the periodic table, so Si-C bonds are of comparable strength to C-C and Si-Si bonds. Additional advantages of Si substrates for biosensors include easier incorporation into ULSI devices and easier surface preparation relative to C. Room temperature combined galvanic and electroless deposition of compact Si films was recently reported from concentrated formic acid. Here these Si films are used for immobilization of the mouse monoclonal antibody to peanut protein Ara h 1, and subsequent impedance detection of the protein antigen. Peanuts are considered one of the most dangerous food allergens, with severe anaphylactic reactions causing over 100 fatalities in the United States alone each year. Nine possible allergens within peanuts have been identified, Ara h 1 to Ara h 8, and peanut oleosin, with Ara h 1 the most widely studied.","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0081507EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64332794","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}

{"title":"Fuel Cell Durability Enhancement with Cerium Oxide under Combined Chemical and Mechanical Membrane Degradation","authors":"C. Lim, A. S. Alavijeh, M. Lauritzen, Joanna Kolodziej, S. Knights, E. Kjeang","doi":"10.1149/2.0081504EEL","DOIUrl":"https://doi.org/10.1149/2.0081504EEL","url":null,"abstract":"A CeO2 supported membrane electrode assembly (MEA) was fabricated by hot-pressing CeO2-coated electrodes and a PFSA ionomer membrane. Upon application of a combined chemical and mechanical accelerated stress test (AST), the CeO2 supported MEA showed six times longer lifetime and 40 times lower fluoride emission rate than a baseline MEA without cerium. The membrane in the CeO2 supported MEA effectively retained its original thickness and ductility despite the highly aggressive AST conditions. Most of the cerium applied on the anode migrated into the membrane and provided excellent mitigation of joint chemical and mechanical membrane degradation.","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0081504EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64332844","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}

{"title":"Electrospun NiCu Nanoalloy Decorated on Carbon Nanofibers as Chemical Stable Electrocatalyst for Methanol Oxidation","authors":"A. Yousef, R. Brooks, M. Abdelkareem, Jabril A. Khamaj, M. M. El-Halwany, N. Barakat, M. El-Newehy, H. Kim","doi":"10.1149/2.0091509EEL","DOIUrl":"https://doi.org/10.1149/2.0091509EEL","url":null,"abstract":"","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0091509EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64336492","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}

{"title":"Model of Relaxation Processes in Batteries","authors":"N. Galushkin, N. Yazvinskaya, D. Galushkin","doi":"10.1149/2.0091508EEL","DOIUrl":"https://doi.org/10.1149/2.0091508EEL","url":null,"abstract":"At the present time due to the widespread of electric and hybrid vehicles there is a need for batteries practical models construction. In this study, a fundamentally new non-linear structural method was used for battery work modeling. A non-linear structural model is developed of relaxation processes after battery charging. The model is correct for alkaline, acidic and lithium-ion batteries. The comparison of the model solutions with the experimental data for the alkaline batteries showed that the relative error does not exceed 3%. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0091508eel] All rights reserved.","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0091508EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64336870","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}

{"title":"Co2P-Induced Abnormal Electrolyte Decomposition Encountered with LiCoPO4","authors":"Weibing Chen, H. Fang, Bin Yang, Wenhui Ma","doi":"10.1149/2.0101507EEL","DOIUrl":"https://doi.org/10.1149/2.0101507EEL","url":null,"abstract":"","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0101507EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64339942","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}

{"title":"Effect of Seed Layer Thickness Distribution on 3D Integrated Through-Silicon-Vias (TSVs) Filling Model","authors":"Yazhou Zhang, G. Ding, Hong Wang, P. Cheng, Jiangbo Luo","doi":"10.1149/2.0111506EEL","DOIUrl":"https://doi.org/10.1149/2.0111506EEL","url":null,"abstract":"","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0111506EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64343749","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}

{"title":"Highly Ordered Anodic Alumina Nanofibers Fabricated via Two Distinct Anodizing Processes","authors":"Daiki Nakajima, T. Kikuchi, S. Natsui, R. Suzuki","doi":"10.1149/2.0021505EEL","DOIUrl":"https://doi.org/10.1149/2.0021505EEL","url":null,"abstract":"Fabrication of high-density, highly ordered anodic alumina nanofibers was demonstrated via two distinct anodizing processes: porous and fibrous oxide formations. Highly ordered aluminum dimple arrays were fabricated via sulfuric/oxalic acid anodizing and selective porous alumina dissolution. Subsequent pyrophosphoric acid anodizing using the nanostructured aluminum surface caused anodic alumina nanofibers to grow preferentially at the six apexes of the ordered hexagonal aluminum dimples under the appropriate electrochemical conditions. Well-defined, high-density, highly ordered anodic alumina nanofibers with 37–75 nm periodic spacing and at densities of 1.4–5.6 × 1014 m−2 were successfully fabricated on the aluminum surface via two distinct anodizing processes. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. [DOI: 10.1149/2.0021505eel] All rights reserved.","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0021505EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64308054","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}

{"title":"In Situ Observation of Dynamic Meniscus Front Interface in Alkaline Fuel Cell","authors":"H. Matsushima, Wataru Majima, Y. Fukunaka, M. Ueda","doi":"10.1149/2.0031507EEL","DOIUrl":"https://doi.org/10.1149/2.0031507EEL","url":null,"abstract":"Controlling the wetting properties at the three-phase interface is important for improving the performance of alkaline fuel cells. The meniscus of a potassium hydroxide droplet was formed on a nickel electrode, and the interference fringe during the oxygen reduction reaction was observed by confocal laser microscopy. The high spatial resolution of the microscope revealed thin film formation at the meniscus front interface. The thickness decreased with increasing cathodic potential. The generation of microscopic convection by interfacial surface tension may affect mass transfer in the thin film.","PeriodicalId":11470,"journal":{"name":"ECS Electrochemistry Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1149/2.0031507EEL","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64312777","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}