Dissertations / Theses on the topic 'Ring disk electrode'
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Nimley, Christopher. "Fabrication and Characterization of a Disk Ring Shaped Dual Nanometer-Sized Electrode and Its Application to Generation-Collection." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1315.
Full textTran, Van Nhat Anh. "MONITORING OF SULFUR - CONTAING ADDITIVES IN COPPER ELECTRODEPOSITION BY ROTATING RING - DISK ELECTRODE AND COPPER ELECTRODEPOSITION FOR HYBRID BONDING." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/264677.
Full text新制・課程博士
博士(エネルギー科学)
甲第23396号
エネ博第423号
新制||エネ||80(附属図書館)
京都大学大学院エネルギー科学研究科エネルギー応用科学専攻
(主査)教授 平藤 哲司, 教授 土井 俊哉, 准教授 三宅 正男
学位規則第4条第1項該当
Doctor of Energy Science
Kyoto University
DGAM
Krarti, Mohamed Ali. "Contribution a l'etude de la passivite du fer et de sa rupture sur electrodes a disque et disque-anneau : facteurs electrochimiques et hydrodynamiques." Paris 7, 1988. http://www.theses.fr/1988PA077087.
Full textRyabova, Anna. "Électrocatalyse de la réduction de l'oxygène et du peroxyde d'hydrogène sur les oxydes de manganèse." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF011/document.
Full textManganese oxides are of great interest due to their catalytic activity towards the ORR (the oxygen reduction reaction) in alkaline media and can be used as noble metal-free materials for the cathode in liquid and polymer electrolyte alkaline fuel cells. The present thesis is devoted to the investigation of the ORR activity of manganese oxides. It was shown that Mn2O3 with bixbyite structure has a better catalytic activity toward the ORR in alkaline media than other investigated manganese oxide, the surface activity of Mn2O3 is only 4 times lower than that of Pt at an overvoltage of 0.3 V (RHE). The link between the structure of Mn oxides and the ORR activity is found: the specific ORR activity exponentially increases with the potential of the surface Mn(III)/Mn(IV) red-ox couple. To ensure the high electrocatalytic activity of Mn2O3, it is necessary to add carbon to the electrode composition, as well as to keep potential above 0.7 V (RHE)
Benzekri, Najoua. "Contribution au developpement de l'electrode disque-anneau en courant alternatif : applications aux mecanismes de dissolution et passivation anodique." Paris 6, 1988. http://www.theses.fr/1988PA066069.
Full textZhang, Fen. "Applications of Rotating Ring-Disc Electrode in CO2 Electrochemical Reduction in Aqueous Media." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1577812269219211.
Full textPoux, Tiphaine. "Study of the oxygen reduction on perovskite-type oxides in alkaline media." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF001/document.
Full textThe sluggish kinetics of the oxygen reduction reaction (ORR) is largely responsible for the energy losses in energy conversion systems such as fuel cells. Among possible inexpensive catalysts for the ORR, perovskite oxides are promising electrocatalysts in alkaline media. The present thesis is devoted to the investigation of the ORR activity, mechanism and stability of some Co and Mn-based perovskites. The rotating (ring) disk electrode (R(R)DE) studies of the ORR and the HO2- transformations on perovskite/carbon thin layers in NaOH electrolyte prove that O2 is reduced to OH- via a “series” pathway with the HO2- intermediate. For high oxide loadings, the formed HO2- species are further reduced to give a global 4 electron pathway. In these electrodes, carbon plays a dual role. It increases the electrocatalytic activity by improving the electrical contact and it is involved in the ORR mechanism by catalyzing the reduction of O2 into HO2-, especially for Co-based perovskites which display lower reaction rates than Mn-based perovskites
Podal, Pavel. "Studium vlastností katalyzátoru na bázi MnOx s využitím RRDE." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219064.
Full textEngel, Hans-Andreas. "Electron spins in dots and rings: coherence, read out, and transport." Basel : Universität Basel, 2003. http://www.unibas.ch/diss/2003/DissB_6703.htm.
Full textLou, Fei. "Design, fabrication and characterization of plasmonic components based on silicon nanowire platform." Doctoral thesis, KTH, Optik och Fotonik, OFO, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143953.
Full textQC 20140404
Chang, Chia-Chen, and 張家禎. "Electroanalysis Based on Screen-Printed Ring-Disk Electrode." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/30568408606338188891.
Full textWu, Shu Han, and 吳書翰. "Study of mechanism of direct borohydride fuel cell by Rotating ring-disk electrode." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80457344765949214720.
Full text長庚大學
化工與材料工程學系
101
The Rotating ring-disk electrode can help us to study reaction intermediates change. Most of study of rotating ring-disk electrode, the disk electrode occurs oxidation reactions and the ring electrode occurs reduction reactions. Study of electrocatalytic sodium borohydride, only use the same metal catalyst as the disk and ring electrode. Such study is not complete. My study will use difference metal catalyst as the disk and ring electrode for electrocatalytic sodium borohydride. Generated on the disk electrode to oxidation of sodium borohydride, and the hold ring electrode potential to oxidation of the intermediate product of sodium borohydride.
YAN, YONG-SIANG, and 顏永翔. "Using Rotating Ring-Disk Electrode to in situ Monitoring of Polysulfide in Lithium-Sulfur Batteries." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/qaqkqw.
Full textFang, Bor Jian, and 方柏堅. "Rotating ring disk electrode measurements on modified spinel dissolution and capacity losses in lithium-ion cells." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/25457833433015297182.
Full text高雄醫學大學
化學系碩士班
92
There are three parts in this research. The first part was to study the cycle performance of LiMn2O4 spinel and its modified cathode materials by the pouch cells. The second part was to study capacity fade of LiMn2O4 spinel and its modified cathode materials by cyclic voltammetry(CV) scan experiments. The third part was to study Mn dissolution from LiMn2O4 spinel and its modified electrodes by rotating ring-disk collection experiments. Results exhibited modifications LiMn2O4 spinel improved capacity fade rate and suppressed the dissolution of the Mn ion, especially in 612(Li1.06Al0.2Mn1.74O4) cathode material sample for cycling and CV tests. In the rotating ring-disk collection experiments, results exhibited most of Mn dissolution occurs charge state. In the tests of all spinel materials, results exhibited small capacity fade rate and suppressed the dissolution of the Mn+2 ion for the 612 spinel cathode material sample.
CHENG, MENG-HUAN, and 鄭孟桓. "Using Rotating Ring-Disk Electrode to Study the Stability of Organic Solvents in Li-O2 Battery Electrolytes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/14204751332752515397.
Full text國立高雄大學
應用化學系碩士班
105
Lithium-Oxygen Battery (Li-O2 battery) is attractive due to its huge theoretical energy density (~11000 W/hr), but there are still some obstacles to be overcome. One of the problems is that the electrolyte is not stable and may decompose during discharging/charging process. To realize and to solve this problem, we use rotating ring disk electrode voltammetry (RRDEs) to study the reactions and to quantify the stability of the electrolyte by calculating the oxygen reaction rate constant(kf) and the electrolyte decomposition rate constant(k). Our results confirm that acetonitrile(MeCN) gets the highest kf(7.78×10-2 cms-1), which means the oxygen reduction reaction is the most easily to work in this electrolyte. Pyr14TFSI(1-Butyl-1- methylpyrrolidinium bis(trifluoromethylsulfonyl)imide)has the smallest kf due to its high viscosity and low oxygen diffusion ability. At the other hand, Pyr14TFSI has the lowest decomposition rate constants, means this electrolyte has the best stability against superoxide.
Yang, Hong-kai, and 楊宏凱. "Using rotating ring disk electrode to study the electrochemical performance of Mn3O4 particle in rechargeable Li-O2 batteries." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/46407212683052596229.
Full text國立高雄大學
應用化學系碩士班
103
In recent years, Li-O2 batteries are much attractive because of the huge theoretical energy density close to fossil fuels. The disadvantage of Li-O2 battery is high overpotential between charge and discharge. That will cause the decomposition of the electrolyte, and poor efficiency of the cycle life. The application of catalysts can effectively decrease the Li−O2 recharge potential. In this study, we use the surfactant and manganese sulfate as a precursor solution, and to preparing Mn3O4 particles by using ultrasonic atomization as a catalyst using in the Li-O2 battery cathode. The physical characteristics and electrochemical performance of the Mn3O4 particles was investigated using X-ray diffraction, scanning electron microscopy particle size analysis, BET measurements, charge-discharge tests and rotating ring disk electrode experiments (RRDE). Rotating ring disk electrode experiments can be divided into two parts. The first part is using the electrolyte without lithium ion. We could find the material oxygen reduction rate constant(kf) by Levich-koutechy equation and decomposition of the electrolyte reaction rate constant(k) by collection efficiency. The second part is using the electrolyte solution containing lithium ions. Make the reaction system close to the Li-O2 battery system. And using RDE experiments to fide the polarization curves and compare with aircell test. Form the test, employing the Mn3O4 as electrocatalyst in Li-air batteries, the Li-air batteries display lower overpotential and good discharge capacity. This result demonstrates Mn3O4 are promising cathode electrocatalysts for non-aqueous Li-air batteries.
TING, HSIAO-HAN, and 丁曉涵. "Determination of Hydroquinone and Zinc Phenolsulfonate in Cosmetic Samples Using Pre-anodized Screen-printed Carbon Ring-disk Electrode." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/80623958742918196445.
Full text靜宜大學
化粧品科學系
104
The study demonstrated the application of pre-anodized screen-printed carbon ring-disk electrode coupled with a flow injection analysis (FIA) system to determine two cosmetic ingredients: hydroquinone (HQ) and zinc phenolsulfonate (ZPS). This study divided into two parts, the first part is quantity of hydroquinone. From the results of the voltammogram, it was observed that pre-anodized could improve detection hydroquinone either oxidized or reduced sensitivity, and it can detect HQ both oxidation and reduction signals at the same time when HQ flowing through the electrode surface. Additionally, the interference experiments were also verified by calculating redox ratio. The analytical results indicated that the linear range between 0.25 mgL-1 to 160 mgL-1 with a correlation coefficient (R2) of 0.999, and the limit of detection (LOD, S/N = 3) was 0.024 mgL-1. At the same time, real samples were also tested, appreciable recovery was obtained and ranging from 97.76 % to 103.74 %. The second part of this study is the analysis of zinc phenolsulfonate, ZPS at 1.5 V has oxidation current, but found that the detection of oxidation signal showed matrix interferences at a high oxidation potential (1.5 V). Therefore, it can be successfully applied to detect intermediate product reduction signal at a low reduction potential (0.1 V). The results showed that the linear range was from 1 mgL-1 to 160 mgL-1 with a correlation coefficient (R2) of 0.9997, and the detection limit was 0.076 mgL-1 (S/N = 3). Finally, on the real samples were tested, the recovery ranging from 99.54 % to 104.37 %. The above two methods are able to meet the high sensitivity and stability. At the same time it can also be applied to detection of a commercially available product samples and it gives excellent recovery.
Ou, Chin-Ching, and 歐進清. "Rotating ring disk electrode measurements on spinel dissolution and capacity losses in 4 V Li/LixMn2O4 rechargeable cells." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/08581367731591231723.
Full text高雄醫學大學
化學系碩士班
90
The major work of the research is divided into two parts .The first part was to study the capacity fading of LiMn2O4 spinel after 20 charge-discharged cycles in comparison with a commercialized LiCoO2. The capacity loss was 14.7% for LiCoO2 and 39.8% for LiMn2O4, respectively. The second part is to study Mn2+ dissolution from LiMn2O4 spinel cathode resulting in capacity fading by rotating ring-disk collection experiments. Results showed that the anodic stripping potential (Mn2+/Mn reduction) is about 1.8V. The quantity of Mn2+ dissoluted from the spinel into the electrolyte solution was increased with the increasing of number of cycles as well as temperature. The Mn+2 leaches into the solution and leads the capacity loss.
Scholz, Julius. "Hybrid systems of molecular ruthenium catalyst anchored on oxide films for water oxidation: Functionality of the interface." Diss., 2017. http://hdl.handle.net/11858/00-1735-0000-0023-3F56-7.
Full textZHAN, SHU-HUA, and 詹淑華. "The study of the potential and current distribution of the disk, ring and ring-disk electrodes." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/36452506394528078650.
Full textZheng, Yong-Jia, and 鄭永嘉. "The ring disc electrode properties of anisotropic conductive film." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47984950874905811387.
Full text國立交通大學
電子物理系所
95
This article reports ACF disc electrode for rde(rotating disc electrode) application. The experiment of the ACF electrodes show the mass transport-limited faradic current in the disk electrode is a linear function of the square root of rotation velocity. The diffusion coefficient of iodine was calculated form Levich equation. And we reports ACF films ring disc electrode. The disc electrode will oxidate iodine inside diffusion layer when voltage bias on electrode. When the electrode rotates, the iodide will go to the ring electrode.The ring electrode will reduce iodide.It will generates accepting current. Then we can calculate the collecting rate to show ACF ring disc electrode can work in RRDE (rotating ring disk electrode) experiment.
Lee, Yueh-Hsing, and 李月星. "The Application of Ring-Disk Screen-Printed Electrodes in Chemical Analysis." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/84994407092767666995.
Full textLiao, Chun-Yen, and 廖俊彥. "The Research and Development of Electroanalytical Methods Based on Disposable Ring-Disk Electrodes." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/75444448749698429485.
Full textChen, Jr-Hsin, and 陳智信. "The Development and Application of Double Wall-Jet Ring-Disk Screen Printed Electrodes in Electroanalysis." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/30371273859338474206.
Full text國立中興大學
化學系所
95
The development and application of Double Wall-Jet Ring-Disk Screen Printed Electrodes (DWJ-RD-SPE) is focused on this study. The system contains a disposable Screen-Printed Ring-Disk carbon electrode together with BAS thin-layer Wall-Jet flow cell for flow injection analysis. First, the DWJ-RD-SPEs were fabricated with a built-in three-electrode pattern of alternating printed-layer of carbon, silver, and insulator on a non-conductive polypropylene substrate. By controlling the layers of ring electrode screen printed, we can control the height of ring electrode, thus making higher collection efficiency possible. Then we eliminated other factors that may affect the collection efficiency of the DWJ-RD-SPE, and proved that the double Wall-Jet effect is the main effect for the even higher collection efficiency. By applying this newly developed electrodes to iodine-iodide oxidation-reduction system, we can prove the double Wall-Jet effect again. Second, we report here an application of a disposable Screen-Printed Ring-Disk carbon electrodes (RD-SPE) for sensitive determination of five aminoglycosides. The electrogenerated bromine at the disk electrode of the RD-SPE can react with aminoglycosides and hence the inhibited collect current at the ring electrode can be used for determination of aminoglycosides by flow injection analysis (FIA). Under the optimal conditions of aminoglycoside determination, the RD-SPE shows a linear calibration range of 1-100 uM
Ku, Hung-Hui, and 古弘煇. "The Application of Disposable Ring-Disc Screen Printed Electrodes in the Electrochemical Analysis." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/59892006357316305019.
Full text國立中興大學
化學系所
94
We report here the application of a disposable screen-printed ring-disc electrode (SPRDE) for sensitive determination of As (III) and Malondialdehyde (MDA). The electrogenerated iodine at the disc electrode of the SPRDE can oxidize arsenite and hence the inhibited collect current at the ring electrode can be used for determination of As (III) and MDA by flow injection analysis (FIA). Under the optimal conditions of As (III) determination, the SPRDE shows a linear calibration range of 10-50 μM with current sensitivity and regression coefficient of 0.017 μA/μM and 0.999, respectively. The detection limit (S/N = 3) was determined to be 0.35 μM. The SPRDE shows tolerable interference effect to PO42-, Cl-,NO3-, and SO42- for even up to 100 times excess in concentration with respect to 10 μM arsenite. The concept of single drop analysis based on the reaction betweenarsenite and iodine was developed. We modified screen-printed electrode by poly (4-vinyl pyridine) (PVP). The screen-printed electrode shows a linear calibration range of 20-2.5 μM with current sensitivity and regression coefficient of 0.087 μA/μM and 0.998, respectively.