International journal of electrochemistry最新文献_第4页

Synthesis and Electrocatalytical Application of Hybrid Pd/Metal Oxides/MWCNTs 钯/金属氧化物/MWCNTs杂化材料的合成及其电催化应用

IF 1.8

International journal of electrochemistry Pub Date : 2018-06-06 DOI: 10.1155/2018/8416268

Yuh-Jing Chiou, Guozhi Wu, Hong‐Ming Lin, A. Borodziński, P. Kędzierzawski, L. Stobiński

{"title":"Synthesis and Electrocatalytical Application of Hybrid Pd/Metal Oxides/MWCNTs","authors":"Yuh-Jing Chiou, Guozhi Wu, Hong‐Ming Lin, A. Borodziński, P. Kędzierzawski, L. Stobiński","doi":"10.1155/2018/8416268","DOIUrl":"https://doi.org/10.1155/2018/8416268","url":null,"abstract":"The performance of Pd electrocatalysts for formic acid electrooxidation was improved by application of metal oxide-multiwall carbon nanotubes composites as a catalyst support. Hybrid oxides/MWCNTs were synthesized by two different methods: chemical reduction method and impregnation method. Pd based catalysts were synthesized by polyol method on the MWCNTs or oxide/MWCNTs composites. The In2O3 was deposited on MWCNTs by impregnation method (In2O3/MWCNTs-IM support) and in the presence of NaBH4 (In2O3/MWCNTs-NaBH4 support). The physical properties of the Pd/In2O3/MWCNTs-IM, Pd/In2O3/MWCNTs-NaBH4, Pd/SnO2/MWCNTs, and Pd/MWCNTs catalysts were characterized and their electrocatalytical performance in formic acid oxidation was compared. During Pd deposition on In2O3/MWCNTs-NaBH4 support, InPd2 structure was formed as observed by XRD. The electrochemical tests indicate that the two Pd/ In2O3/MWCNTs electrocatalysts have higher electrocatalytic activity than those of Pd/SnO2/MWCNTs and Pd/MWCNTs. The best performance was observed for the catalyst obtained by In2O3 impregnation of MWCNTs denoted by Pd/In2O3/MWCNTs-IM.","PeriodicalId":13933,"journal":{"name":"International journal of electrochemistry","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2018-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/8416268","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41875453","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: 5

Oxygen-Containing Nanoclusters on the Surface of Pt-Electrodes and Oxygen Reduction Reaction in Alkaline Medium pt电极表面含氧纳米团簇及其在碱性介质中的氧还原反应

IF 1.8

International journal of electrochemistry Pub Date : 2018-06-04 DOI: 10.1155/2018/7164578

A. M. Trunov

{"title":"Oxygen-Containing Nanoclusters on the Surface of Pt-Electrodes and Oxygen Reduction Reaction in Alkaline Medium","authors":"A. M. Trunov","doi":"10.1155/2018/7164578","DOIUrl":"https://doi.org/10.1155/2018/7164578","url":null,"abstract":"Analysis of the role of oxygen-containing nanoclusters in oxygen reduction reaction (ORR) on Pt-electrodes in alkaline media is provided on the basis of the concept of electrochemical processes with slowed stage of consecutive heterogeneous chemical reaction (ConHCR). Under the ConHCR concept, the main factor determining the ORR characteristics is energetic inhomogeneity of electrode surface (EIES) according to Temkin. A new concept, according to which EIES is determined by the Gibbs energy of formation of oxygen-containing surface structures with inclusions of surface defects of the platinum crystal structure, Pts,d, is formulated. A correlation between the level of EIES of Pt-electrodes and packing density of Pts,d atoms on the surface of Pt(hkl) monocrystals is determined. The concept, according to which the stationary potential of ORR process is considered as a “mixed potential” of two reactions (electrochemical reduction of surface atom PtIIs,d and consecutive oxidation of PtIs,d by molecular oxygen), is substantiated. It is proposed that the formation of surface nanocluster transition state [⁎(OO)PtIIs,d(OH)] defines the rate of the entire ORR process on Pt-electrodes in alkaline media.","PeriodicalId":13933,"journal":{"name":"International journal of electrochemistry","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/7164578","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47293305","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: 1

Protection of Steel Rebar in Salt-Contaminated Cement Mortar Using Epoxy Nanocomposite Coatings 环氧纳米复合涂层对盐污染水泥砂浆中钢筋的防护

IF 1.8

International journal of electrochemistry Pub Date : 2018-04-24 DOI: 10.1155/2018/8386426

T. Nguyen

{"title":"Protection of Steel Rebar in Salt-Contaminated Cement Mortar Using Epoxy Nanocomposite Coatings","authors":"T. Nguyen","doi":"10.1155/2018/8386426","DOIUrl":"https://doi.org/10.1155/2018/8386426","url":null,"abstract":"Epoxy reinforced with two kinds of nanoparticles dealing with nano-SiO2 and nano-Fe2O3 was coated on steel rebar embedded in a chloride contaminated cement mortar. NaCl was added to the fresh Portland cement paste (at 0.3% and 0.5% by weight of cement) to simulate the chloride contamination at the critical level. The effect of incorporating nanoparticles on the corrosion resistance of epoxy-coated steel rebar was investigated by linear potentiodynamic polarization and electrochemical impedance spectroscopy. For the 0.3 wt.% chloride mortars, the electrochemical monitoring of the coated steel rebars during immersion for 56 days in 0.1 M NaOH solutions suggested the beneficial role of nano-Fe2O3 particles in significantly improving the corrosion resistance of the epoxy-coated rebar. After 56 days of immersion, the nano-Fe2O3 reduced the corrosion current of epoxy-coated rebar by a factor of 7.9. When the chloride concentration in the cement mortar was 0.5 wt.%, the incorporation of nanoparticles into the epoxy matrix did not enhance the corrosion resistance of epoxy coating for the rebar. At this critical level, chloride ions initiated rebar corrosion through nanoparticles at the epoxy/rebar interface.","PeriodicalId":13933,"journal":{"name":"International journal of electrochemistry","volume":"2018 1","pages":"1-10"},"PeriodicalIF":1.8,"publicationDate":"2018-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/8386426","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47947787","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: 12

Performance of Novel Randomly Oriented High Graphene Carbon in Lithium Ion Capacitors 新型随机取向高石墨烯碳在锂离子电容器中的性能

IF 1.8

International journal of electrochemistry Pub Date : 2018-03-01 DOI: 10.1155/2018/4712148

R. Kadam, K. Gadkaree

{"title":"Performance of Novel Randomly Oriented High Graphene Carbon in Lithium Ion Capacitors","authors":"R. Kadam, K. Gadkaree","doi":"10.1155/2018/4712148","DOIUrl":"https://doi.org/10.1155/2018/4712148","url":null,"abstract":"The structure of carbon material comprising the anode is the key to the performance of a lithium ion capacitor. In addition to determining the capacity, the structure of the carbon material also determines the diffusion rate of the lithium ion into the anode which in turn controls power density which is vital in high rate applications. This paper covers details of systematic investigation of the performance of a structurally novel carbon, called Randomly Oriented High Graphene (ROHG) carbon, and graphite in a high rate application device, that is, lithium ion capacitor. Electrochemical impedance spectroscopy shows that ROHG is less resistive and has faster lithium ion diffusion rates (393.7 × 10−3 S·s(1/2)) compared to graphite (338.1 × 10−3 S·s(1/2)). The impedance spectroscopy data is supported by the cell data showing that the ROHG carbon based device has energy density of 22.8 Wh/l with a power density of 4349.3 W/l, whereas baseline graphite based device has energy density of 5 Wh/l and power density of 4243.3 W/l. This data clearly shows advantage of the randomly oriented graphene platelet structure of ROHG in lithium ion capacitor performance.","PeriodicalId":13933,"journal":{"name":"International journal of electrochemistry","volume":"2018 1","pages":"1-9"},"PeriodicalIF":1.8,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/4712148","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48235880","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

The Redox Chemistry of Ruthenium Dioxide: A Cyclic Voltammetry Study—Review and Revision 二氧化钌氧化还原化学的循环伏安法研究——评述与修正

IF 1.8

International journal of electrochemistry Pub Date : 2018-02-01 DOI: 10.1155/2018/1273768

S. Chalupczok, P. Kurzweil, H. Hartmann, C. Schell

引用次数: 30

Impact of Various Acids and Bases on the Voltammetric Response of Platinum Group Metal Oxides 不同酸碱对铂族金属氧化物伏安响应的影响

IF 1.8

International journal of electrochemistry Pub Date : 2018-01-23 DOI: 10.1155/2018/1697956

S. Chalupczok, P. Kurzweil, H. Hartmann

引用次数: 14

Synthesis and Electrochemical Characterization of Palladium Crystals Enclosed by (100) Facets by Seed-Mediated Fabrication 种子介导法制备(100)面包围钯晶体及其电化学表征

IF 1.8

International journal of electrochemistry Pub Date : 2018-01-21 DOI: 10.1155/2018/7138638

E. Higuchi, M. Kawai, Masanobu Chiku, H. Inoue

引用次数: 4

Carbon Nanoelectrodes for the Electrochemical Detection of Neurotransmitters. 用于神经递质电化学检测的碳纳米电极。

IF 1.8

International journal of electrochemistry Pub Date : 2018-01-01 Epub Date: 2018-08-01 DOI: 10.1155/2018/3679627

Alexander G Zestos

{"title":"Carbon Nanoelectrodes for the Electrochemical Detection of Neurotransmitters.","authors":"Alexander G Zestos","doi":"10.1155/2018/3679627","DOIUrl":"https://doi.org/10.1155/2018/3679627","url":null,"abstract":"Carbon-based electrodes have been developed for the detection of neurotransmitters over the past 30 years using voltammetry and amperometry. The traditional electrode for neurotransmitter detection is the carbon fiber microelectrode (CFME). The carbon-based electrode is suitable for in vivo neurotransmitter detection due to the fact that it is biocompatible and relatively small in surface area. The advent of nanoscale electrodes is in high demand due to smaller surface areas required to target specific brain regions that are also minimally invasive and cause relatively low tissue damage when implanted into living organisms. Carbon nanotubes (CNTs), carbon nanofibers, carbon nanospikes, and carbon nanopetals among others have all been utilized for this purpose. Novel electrode materials have also required novel insulations such as glass, epoxy, and polyimide coated fused silica capillaries for their construction and usage. Recent research developments have yielded a wide array of carbon nanoelectrodes with superior properties and performances in comparison to traditional electrode materials. These electrodes have thoroughly enhanced neurotransmitter detection allowing for the sensing of biological compounds at lower limits of detection, fast temporal resolution, and without surface fouling. This will allow for greater understanding of several neurological disease states based on the detection of neurotransmitters.","PeriodicalId":13933,"journal":{"name":"International journal of electrochemistry","volume":"2018 ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2018/3679627","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39220538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Reduction of the Electrode Overpotential of the Oxygen Evolution Reaction by Electrode Surface Modification 电极表面修饰降低析氧反应电极过电位

IF 1.8

International journal of electrochemistry Pub Date : 2017-06-28 DOI: 10.1155/2017/7494571

Cian-Tong Lu, Yen-Wen Chiu, Meiran Li, K. Hsueh, J. Hung

引用次数: 13

Thermodynamics of Lithium Intercalation in Randomly Oriented High Graphene Carbon 随机取向高石墨烯碳中锂嵌入的热力学

IF 1.8

International journal of electrochemistry Pub Date : 2017-06-15 DOI: 10.1155/2017/5391794

R. Kadam, K. Gadkaree

{"title":"Thermodynamics of Lithium Intercalation in Randomly Oriented High Graphene Carbon","authors":"R. Kadam, K. Gadkaree","doi":"10.1155/2017/5391794","DOIUrl":"https://doi.org/10.1155/2017/5391794","url":null,"abstract":"This paper covers details of systematic investigation of the thermodynamics (entropy and enthalpy) of intercalation associated with lithium ion in a structurally novel carbon, called Randomly Oriented High Graphene (ROHG) carbon and graphite. Equilibrated OCV (Open Circuit Voltage) versus temperature relationship is investigated to determine the thermodynamic changes with the lithium intercalation. ROHG carbon shows entropy of 9.36 J·mol−1·K−1 and shows no dependency on the inserted lithium concentration. Graphite shows initial entropy of 84.27 J·mol−1·K−1 and shows a strong dependence on lithium concentration. ROHG carbon (from −90.85 kJ mol−1 to −2.88 kJ mol−1) shows gradual change in the slope of enthalpy versus lithium ion concentration plot compared to graphite (−48.98 kJ mol−1 to 1.84 kJ mol−1). The study clearly shows that a lower amount of energy is required for the lithium ion intercalation into the ROHG structure compared to graphite structure. Randomly oriented graphene platelet cluster structure of ROHG carbon makes it easier for the intercalation or deintercalation of lithium ion. The ease of intercalation and the small cluster structure of ROHG as opposed to the long linear platelet structure of graphite lead to higher rates of the charge-discharge process for ROHG, when used as an electrode material in electrochemical applications.","PeriodicalId":13933,"journal":{"name":"International journal of electrochemistry","volume":"2017 1","pages":"1-6"},"PeriodicalIF":1.8,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2017/5391794","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47968365","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: 4