Дисертації з теми "Oxygen Electrocatalysts"
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Gu, Zhihui. "Dissolution of oxygen reduction electrocatalysts in acidic environment." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2458.
Повний текст джерелаMiyahara, Yuto. "Studies on Bifunctional Oxygen Electrocatalysts with Perovskite Structures." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225622.
Повний текст джерелаHong, Wesley T. (Wesley Terrence). "Rational design strategies for oxide oxygen evolution electrocatalysts." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104185.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 143-160).
Understanding and mastering the kinetics of oxygen electrocatalysis is instrumental to enabling solar fuels, fuel cells, electrolyzers, and metal-air batteries. Non-precious transition metal oxides show promise as cost-effective materials in such devices. Leveraging the wealth of solid-state physics understanding developed for this class of materials in the past few decades, new theories and strategies can be explored for designing optimal catalysts. This work presents a framework for the rational design of transition-metal perovskite oxide catalysts that can accelerate the development of highly active catalysts for more efficient energy storage and conversion systems. We describe a method for the synthesis of X-ray emission, absorption, and photoelectron spectroscopy data to experimentally determine the electronic structure of oxides on an absolute energy scale, as well as extract key electronic parameters associated with the material. Using this approach, we show that the charge-transfer energy - a parameter that captures the energy configuration of oxygen and transition-metal valence electrons - is a central descriptor capable of modifying both the oxygen evolution kinetics and mechanism. Its role in determining the absolute band energies of a catalyst can rationalize the differences in the electron-transfer and proton-transfer kinetics across oxide chemistries. Furthermore, we corroborate that the charge-transfer energy is one of the most influential parameters on the oxygen evolution reaction through a statistical analysis of a multitude of structure-activity relationships. The quantitative models generated by this analysis can then be used to rapidly screen oxide materials across a wide chemical space for highthroughput materials discovery.
by Wesley T. Hong.
Ph. D.
Surendranath, Yogesh. "Oxygen evolution mediated by co-based thin film electrocatalysts." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/65477.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references.
The electrocatalytic conversion of water to O₂ is the key efficiency-determining reaction for the storage of electrical energy in the form of liquid fuels. In this thesis, the simple preparation of a cobalt-based catalyst for the oxygen evolution reaction (OER) is described and details of its structure, valency, mechanism of action, and mechanism of formation at intermediate pH are elaborated. The catalyst is obtained as an electronically conductive, porous thin film by electrolysis of Co2 in aqueous phosphate, methylphosphonate, or borate electrolyte. Catalyst films prepared from phosphate are comprised of Co oxo/hydroxo clusters of molecular dimensions, as determined by X-ray absorption spectroscopy. The clusters consist of edge-sharing CoO6 octahedra arranged in a sheet-like pattern. The average cluster nuclearity increases as the film thickness increases. X-ray absorption near edge structure (XANES) spectra, EPR spectra, and electrochemical data support a catalyst film consisting predominately of Co(III) in the absence of an applied bias with minor populations of Co(II) and Co(IV) centers. As the film is polarized in the region of water oxidation, the population of Co(IV) centers increases systematically. The mechanism of the OER mediated by the catalyst was studied at neutral pH by electrokinetic and 180 isotope experiments. The catalyst exhibits an OER Tafel slope approximately equal to 2.3 x RT/F, an inverse first order dependence on proton activity, and a zeroth order dependence on phosphate for buffer strengths > 0.03 M. In the absence of phosphate, the Tafel slope increases ~3 fold and the overall activity is greatly diminished. These data point to an OER mechanism involving a rapid, one electron, one proton, equilibrium between Co"'-OH and CoWv-O in which a phosphate species is the proton acceptor, followed by a chemical turnover-limiting process involving oxygen-oxygen bond coupling. The mechanisms of nucleation, steady-state growth, and repair of the catalyst were studied at intermediate pH by electrokinetic, AFM and NMR methods. Catalyst nucleation is progressive with a non-zero-order nucleation rate law. Steady-state growth exhibits a Tafel slope approximately equal to 2.3 x RT/F, an inverse third order dependence on proton activity, and an inverse first order dependence on buffer strength. Together, the electrokinetic studies point to a mechanism involving a rapid one-electron, three-proton equilibrium oxidation of Co2+ coupled to phosphate dissociation from the catalyst surface, which is followed by a chemical rate-limiting process involving Co binding to the growing clusters. Consistent with the disparate pH profiles for the OER and catalyst formation, functional stability and repair are operative at pH > 6 whereas catalyst corrosion prevails at lower pH.
by Yogesh Surendranath.
Ph.D.
Richardson, Peter. "Oxygen evolution electrocatalysts for proton exchange membrane water electrolysis." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/374786/.
Повний текст джерелаChen, Junsheng. "Ternary Metal Oxide/(Oxy)Hydroxide for Efficient Oxygen Evolution Reaction." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25536.
Повний текст джерелаLuo, Lin. "Novel Nanostructure Electrocatalysts for Oxygen Reduction and Hydrogen Evolution Reactions." University of the Western Cape, 2019. http://hdl.handle.net/11394/7315.
Повний текст джерелаThe widespread use of fossil energy has been most convenient to the world, while they also cause environmental pollution and global warming. Therefore, it is necessary to develop clean and renewable energy sources, among which, hydrogen is considered to be the most ideal choice, which forms the foundation of the hydrogen energy economy, and the research on hydrogen production and fuel cells involved in its production and utilization are naturally a vital research endeavor in the world. Electrocatalysts are one of the key materials for proton exchange member fuel cells (PEMFCs) and water splitting. The use of electrocatalysts can effectively reduce the reaction energy barriers and improve the energy conversion efficiency.
Dong, Mengyang. "Heterostructured Electrocatalysts for Oxygen Electrode in Rechargeable Zinc-Air Batteries." Thesis, Griffith University, 2022. http://hdl.handle.net/10072/418672.
Повний текст джерелаThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
NGUYEN, MINH TOAN. "Iron-based electrocatalysts for oxygen reduction in microbial fuel cells." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2014. http://hdl.handle.net/2108/214227.
Повний текст джерелаBaez, Baez Victor Antonio. "Metal oxide coated electrodes for oxygen reduction." Thesis, University of Southampton, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241271.
Повний текст джерелаZou, Yu. "Supported Composite Electrocatalysts for Energy Conversion Applications." Thesis, Griffith University, 2022. http://hdl.handle.net/10072/417198.
Повний текст джерелаThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
Lamas, Eduardo J. "Theoretical studies of transition metal surfaces as electrocatalysts for oxygen electroreduction." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5826.
Повний текст джерелаFahy, Kieran. "Base-material electrocatalysts for oxygen reduction in low temperature fuel cells." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707964.
Повний текст джерелаBatchellor, Adam. "STRUCTURE-ACTIVITY RELATIONSHIPS IN NI-FE (OXY)HYDROXIDE OXYGEN EVOLUTION ELECTROCATALYSTS." Thesis, University of Oregon, 2017. http://hdl.handle.net/1794/22268.
Повний текст джерелаBediako, Daniel Kwabena. "Structural and mechanistic studies of nickel-borate thin-film oxygen evolving electrocatalysts." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79266.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references.
Increases in global energy demand and rising levels of atmospheric carbon dioxide demand renewable alternatives to fossil fuels as the primary energy sources of the 21st century. Solar energy is by far the most abundant renewable energy resource, yet its widespread use has been hampered by a lack of suitable methods to store energy from sunlight in a cheap and efficient manner. Solar driven water splitting is a promising method of storing solar energy, but a critical bottleneck in developing efficient photoelectrochemical (PEC) water splitting systems lies in the kinetic sluggishness of the water splitting reactions, particularly the oxygen evolution reaction (OER). In this thesis the structural and mechanistic underpinnings for the activity of a promising nickel-based oxygen evolving catalyst (OEC) are discussed. The catalyst is particularly attractive as a result of the simplicity of its preparation as a thin film from aqueous borate-buffered solutions of Ni₂ . Electrochemical and in situ X-ray absorption near-edge structure (XANES) studies of this nickel-borate (Ni-Bi) catalyst indicate that upon initial electrodeposition, Ni centers in the film exist predominantly in the +3 oxidation state and the as-deposited material is largely inactive towards the OER. Catalytic activation is achieved by anodization of the as-deposited material in concentrated borate buffer, pH 9.2, a process which serves to oxidize the nickel centers to a mixed-valence Ni(II/IV) state. Extended X-ray absorption fine structure (EXAFS) spectroscopy studies indicate that Ni-Bi is comprised of nanometer-sized clusters of edge sharing NiO₆ octahedra. A structural transformation is observed during anodization that is akin to that observed in the [beta]-NiOOH-[gamma]-NiOOH transformation, challenging the long-held view that the phase that is the most catalytically active towards the OER is the all-Ni(III) [rho]-NiOOH. Electrokinetic studies indicate that the as-deposited Ni-Bi exhibits a Tafel slope close to 2.3 x 2RT/F, consistent with a turnover-limiting electron transfer (ET) from the geometrically distorted low-spin d⁷ Ni(III) state. Upon anodization to the mixed valence Ni(III/IV) state and elimination of geometric distortion, ET from the resting state becomes more facile resulting in a low Tafel slope of 2.3 x RT/2F, indicative of a rapid two-electron pre-equilibrium followed by a rate limiting chemical step, likely O₂ formation. Anodized Ni-Bi also exhibits an inverse third order dependence in proton activity and inverse first order dependence in borate anion. This kinetically-relevant two-electron, three-proton proton-coupled electron transfer (PCET) equilibrium prior to rate limiting O₂ formation forms the mechanistic basis for the pHdependent difference in activity between Ni-Bi and its cobalt-based analog, which contrarily mediates oxygen evolution via a kinetically-relevant one-electron, one-proton PCET transformation. The difference in catalytic O₂ evolution mechanism is a principal factor in the determination of the overall solar-to-fuels efficiency of PEC water splitting systems.
by Daniel Kwabena Bediako.
S.M.
Vossen, Agnes. "Base material electrocatalysts for oxygen cathodes in low temperature acid fuel cells." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620690.
Повний текст джерелаInwood, David Warwick. "X-ray and electrochemical studies of bimetallic Pt-based oxygen reduction electrocatalysts." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/417989/.
Повний текст джерелаZAGO, STEFANO. "Fe-N-C electrocatalysts from waste biomass for the oxygen reduction reaction." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2967851.
Повний текст джерелаZhao, Zhenghang. "Design Principle on Carbon Nanomaterials Electrocatalysts for Energy Storage and Conversion." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc984279/.
Повний текст джерелаColeman, Eric James. "Robust Platinum-Based Electrocatalysts for Fuel Cell Applications." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437484946.
Повний текст джерелаTrotochaud, Lena. "Structure-Composition-Activity Relationships in Transition-Metal Oxide and Oxyhydroxide Oxygen-Evolution Electrocatalysts." Thesis, University of Oregon, 2014. http://hdl.handle.net/1794/18312.
Повний текст джерела2015-03-29
Eychmüller, Alexander, Chengzhou Zhu, Dan Wen, Susanne Leubner, Martin Oschatz, Wei Liu, Matthias Holzschuh, Frank Simon, and Stefan Kaskel. "Nickel cobalt oxide hollow nanosponges as advanced electrocatalysts for the oxygen evolution reaction." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-188848.
Повний текст джерелаSheng, Meili. "Heterogeneous and Homogeneous Nickel-Based Electrocatalysts for Oxygen Evolution and Carbon Dioxide Reduction." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/5151.
Повний текст джерелаXing, Shihui. "Rational design of bi-transition metal oxide electrocatalysts for hydrogen and oxygen evolutions." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/209307/1/Shihui_Xing_Thesis.pdf.
Повний текст джерелаLeonardy, Adrianus. "Non-Noble Metal Electrocatalysts for Proton Exchange Membrane Fuel Cell." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/12036.
Повний текст джерелаCrumlin, Ethan J. "Fundamental studies of heterostructured oxide thin film electrocatalysts for oxygen reduction at high temperatures." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74904.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references.
Searching for active and cost-effective catalysts for oxygen electrocatalysis is essential for the development of efficient clean electrochemical energy technologies. Perovskite oxides are active for surface oxygen exchange at evaluated temperatures and they are used commonly in solid oxide fuel cells (SOFC) or electrolyzers. However, the oxide surface chemistry at high temperatures and near ambient oxygen pressure is poorly understood, which limits the design of highly active catalysts. This work investigates heterostructured interfaces between (Lai. xSrx)CoO 3-3 (where x = 0.2 and 0.4, LSC80-2011 3 and LSC60-40 113 respectively) and (Lao. 5 Sro.5 )2CoO 4 ,3 (LSC2 14) enhanced ORR catalytic activity 1) via electrochemical impedance spectroscopy, atomic force microscopy, scanning electron microscopy, scanning transmission electron microscopy, and high resolution X-ray diffraction (HRXRD) and 2) using in situ ambient pressure X-ray photoelectron spectroscopy (APXPS) and in situ HRXRD. Here we show that the ORR of epitaxial LSC80-20 1 3 and LSC60-40113 is dramatically enhanced (~3-4 orders of magnitude above bulk LSC113) by surface decorations of LSC214 (LSC 1 31214) with coverage in the range from ~0.1 to ~15 nm. Such high surface oxygen kinetics (~ 110-5 cm-s1 at 550 C) are among the most active SOFC cathode materials reported to date. Although the mechanism for ORR enhancement is not yet fully understood, our results to date show that the observed ORR enhancement can be attributed to highly active interfacial LSCn 13/LSC214 regions, which were shown to be atomically sharp. Using in situ HRXRD and APXPS we show that epitaxial LSC80-20n3 thin films have lower coverage of surface secondary phases and higher Strontium enrichment in the perovskite structure, which is attributed to its markedly enhanced activity relative to LSC80-20113 powder. APXPS temperature cycling of epitaxial LSC80-20113 APXPS reveled upon heating to 520 *C the initial Sr enrichment which is irreversible, however subsequent temperature cycling demonstrates a small amount of reversible Sr enrichment. With applied potentials LSC80- 2013/214 shows significant Sr enrichment greater then LSC80-20 113, and the ability to stabilize high concentrations of both lattice and surface Sr which we hypothesize is a very important factor governing LSC80-2011 3214 enhanced ORR activity.
by Ethan Jon Crumlin.
Ph.D.
Pandey, Kadel Usha. "Metal-free electrocatalysts for oxygen evolution reaction and photocatalysts for carbon dioxide reduction reaction." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1513279535028305.
Повний текст джерелаBlavo, Selasi Ofoe. "Model Pt- and Pd-based Electrocatalysts for Low Temperature Fuel Cells Applications." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4639.
Повний текст джерелаMohamed, Rhiyaad. "Synthesis and characterisation of Pt-alloy oxygen reduction electrocatalysts for low temperature PEM fuel cells." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1018586.
Повний текст джерелаvon, Deak Dieter G. "Heteroatom-containing Carbon Nanostructures as Oxygen Reduction Electrocatalysts for PEM and Direct Methanol Fuel Cells." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313085489.
Повний текст джерелаLiu, Chen. "Structural Studies of Pt-Based Electrocatalysts for Polymer Electrolyte Fuel Cells." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263807.
Повний текст джерела京都大学
新制・課程博士
博士(総合学術)
甲第23346号
総総博第19号
京都大学大学院総合生存学館総合生存学専攻
(主査)教授 寶 馨, 教授 内本 喜晴, 特定教授 橋本 道雄
学位規則第4条第1項該当
Doctor of Philosophy
Kyoto University
DFAM
Marshall, Aaron. "Electrocatalysts for the oxygen evolution electrode in water electrolysers using proton exchange membranes : synthesis and characterisation." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-774.
Повний текст джерелаElectrocatalysts based on IrO2 have been synthesised and characterised using a wide range of techniques. These oxide materials were primarily developed as oxygen evolution electrocatalysts for proton exchange membrane (PEM) water electrolysis. This development has enabled high performances to be achieved in a PEM water electrolysis cell. Overall the best result was obtained with an Ir0.6Ru0.4O2 anode and 20 wt% Pt/C cathode, with a cell voltage of 1.567 V at 1 A cm−2 and 80 °C when using Nafion 115 as the electrolyte membrane. This represents a cell efficiency of 76 % (εΔG) and an energy consumption of 3.75 kWhr Nm−3 H2 at 1 A cm−2.
Initial results showed that previous synthesis methods used for PEM water electrolysis electrocatalysts, were not suitable for multi element oxides, due to the formation of multiple oxide phases, and general controllability problems. This lead to the development of a new method, based on the thermal oxidation of metallic colloids. This method (modified polyol method) was then used to prepare IrxSn1−xO2 and IrxRu0.5−xSn0.5O2.
The effect of annealing temperature on IrxSn1−xO2 was examined and showed that the crystallinity increases, and the active area decreases, with increasing annealing temperature. The specific activity of this material however was seen to be constant over the entire temperature range, with the performance losses only due to the reduction of active surface area. At high temperatures, the solid solution of IrxSn1−xO2 was seen to become unstable, with segregation of SnO2 from the oxide lattice, and formation of metallic iridium.
The electrochemical properties of the oxides prepared at 500 °C, showed that the addition of SnO2 to IrO2 particles had no beneficial effect. Cyclic voltammetry showed that the active area decreases as the tin content increases, with this related to the crystallinity increase and dilution of the active iridium oxide sites. Additions of up to 20 mol% tin may be acceptable as little change in the active area occurs at low tin contents, however there was still a 40 mV increase in cell voltage at 1 A cm−2 and 80 °C in a PEM water electrolyser. The specific activity of the oxides prepared by the polyol method remains constant until 50–60 mol% tin whereafter the activity decreases. Overall, the electrocatalytic properties in 0.5 M H2SO4 and a PEM cell are similar, however there is evidence to suggest that there are extra resistance issues in the PEM cell due to the poor conductivity of some of the prepared oxides. The effect of anode composition on the PEM cell ohmic resistance confirmed that high tin contents causes high performance losses due to poor layer conductivity.
IrxRu0.5−xSn0.5O2 electrocatalysts showed that additions of 15–25 mol% ruthenium improved the overall oxygen evolution performance at low current densities. However due to agglomeration of metallic ruthenium during the colloid synthesis stage, the electrochemically active area of this oxide, decreased with ruthenium content. XPS revealed that the reduction in active area was directly related to the concentration of noble metals at the surface of the powders. The specific activity of the iridium species at the electrode surface was seen to increase as the ruthenium content of the bulk increased. This finding maybe due to a “support” affect, in which the underlying ruthenium influences the structure and electronic properties of the surface iridium. This reduced active surface area and the increase specific electrocatalytic activity resulted in an optimum in the electrocatalytic performance towards the oxygen evolution reaction at 15–25 mol% Ru.
IrxRuyTazO2 nanocrystalline and amorphous powders were prepared by a hydrolysis method. These oxides exhibited high active surface areas and supercapacitor like properties with the electrode capacitance typically around 200-300 F g−1. No evidence was found to suggest that tantalum oxide forms solid solutions with iridium or ruthenium oxides. It was found however, that the lattice parameters of the rutile oxide in IrxRuyTazO2 samples, can be explained by a solid solution between IrO2 and RuO2. Electrochemical measurements showed that additions of tantalum decreased the electrochemically active surface area, as did high levels of ruthenium. At intermediate ruthenium contents, it was shown that both the low current and high current performance in a PEM water electrolysis cell was very high. Additions of up to 20 mol% Ta are possible without significantly decreasing the performance.
X-ray absorption spectroscopy was used to examine a range of oxide electrocatalysts using both ex-situ and in-situ measurements. The in-situ measurements were performed on oxide electrodes polarised in aqueous 0.5 M H2SO4 electrolyte. The ex-situ measurements on IrxSn1−xO2 showed that it is unlikely that Ir and Sn are atomically mixed as there was no evidence to suggest that Sn is within the first few coordination shells of the Ir. In contrast, for IrxRu1−xO2, Ru was found in the first few Ir–metal coordination shells. Electrochemical measurements showed that for amorphous IrO2, increasing the electrode potential from 0.5 to 1.4 V causes there to be more d-orbital vacancies in the iridium atoms. A valence change (probably Ir3+ → Ir4+) also occurred between 0.9 and 1.0 V vs RHE and there was no evidence to suggest that the iridium was present in any higher oxidation state. From the EXAFS analysis, it was found that the Ir–O bond length decreased by 0.05°A as the potential increased from 0.5 to 1.4 V vs RHE. This is in good agreement with the expected bond length change due to valence change.
Singh, Deepika. "Non-Precious Metal Electrocatalysts for the Oxygen Reduction Reaction in Proton Exchange Membrane (PEM) Fuel Cells." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397727211.
Повний текст джерелаAl-Mamun, Mohammad. "Rational Design of Nanostructured Earth-Abundant Electrocatalysts for Energy Conversion Applications." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/365651.
Повний текст джерелаThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Environment
Science, Environment, Engineering and Technology
Full Text
Minguzzi, A. "Advanced oxygen electrocatalysts for energy conversion devices : research and development of innovative synthetic paths and investigation methodologies." Doctoral thesis, Università degli Studi di Milano, 2007. http://hdl.handle.net/2434/43865.
Повний текст джерелаWang, Zhiyuan Verfasser], Rüdiger-A. [Akademischer Betreuer] [Eichel, and Marcel [Akademischer Betreuer] Liauw. "Oxygen reduction reaction and oxygen evolution reaction mechanisms investigation of the non-noble bifunctional electrocatalysts in alkaline electrolyte / Zhiyuan Wang ; Rüdiger-Albert Eichel, Marcel Liauw." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1169915191/34.
Повний текст джерелаWang, Zhiyuan [Verfasser], Rüdiger-A. [Akademischer Betreuer] Eichel, and Marcel [Akademischer Betreuer] Liauw. "Oxygen reduction reaction and oxygen evolution reaction mechanisms investigation of the non-noble bifunctional electrocatalysts in alkaline electrolyte / Zhiyuan Wang ; Rüdiger-Albert Eichel, Marcel Liauw." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1169915191/34.
Повний текст джерелаCai, Bin, Sebastian Henning, Juan Herranz, Thomas J. Schmidt, and Alexander Eychmüller. "Nanostructuring noble metals as unsupported electrocatalysts for polymer electrolyte fuel cells." Wiley-VCH, 2018. https://tud.qucosa.de/id/qucosa%3A31155.
Повний текст джерелаYan, Shunyao. "Dual Template Pore Engineering of Whey Powder Derived Carbon as Efficient Oxygen Reduction Reaction Electrocatalysts For Primary Zinc-Air Batteries." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/24337.
Повний текст джерелаZiegelbauer, Joseph M. "Fundamental aspects of oxygen reduction reaction on non-platinum electrocatalysts an electrochemical and in situ X-ray absorption spectroscopy study : a dissertation /." View dissertation online, 2007. http://hdl.handle.net/2047/d10016211.
Повний текст джерелаÖztürk, Secil [Verfasser], Christoph [Gutachter] Janiak, and Christian [Gutachter] Ganter. "Metal-Organic Framework and Covalent Triazine Framework Based Electrocatalysts for the Oxygen Evolution Reaction / Secil Öztürk ; Gutachter: Christoph Janiak, Christian Ganter." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2021. http://d-nb.info/1236399560/34.
Повний текст джерелаMassué, Cyriac [Verfasser], Robert [Akademischer Betreuer] Schlögl, Peter [Akademischer Betreuer] Strasser, Robert [Gutachter] Schlögl, Peter [Gutachter] Strasser, and Martin [Gutachter] Muhler. "Iridium oxohydroxide electrocatalysts for the oxygen evolution reaction / Cyriac Massué ; Gutachter: Robert Schlögl, Peter Strasser, Martin Muhler ; Robert Schlögl, Peter Strasser." Berlin : Technische Universität Berlin, 2016. http://d-nb.info/1156014514/34.
Повний текст джерелаYanik, Fatih [Verfasser], Wolfgang [Gutachter] Grünert, and Martin [Gutachter] Muhler. "Core-shell nanoalloys as electrocatalysts for oxygen reduction reaction in polymer electrolyte membrane fuel cells / Fatih Yanik ; Gutachter: Wolfgang Grünert, Martin Muhler." Bochum : Ruhr-Universität Bochum, 2016. http://d-nb.info/1116709767/34.
Повний текст джерелаSchonvogel, Dana [Verfasser], Michael [Akademischer Betreuer] Wark, and K. Andreas [Akademischer Betreuer] Friedrich. "Graphene-Based electrocatalysts for oxygen reduction reaction in high temperature proton exchange membrane fuel cells / Dana Schonvogel ; Michael Wark, K. Andreas Friedrich." Oldenburg : BIS der Universität Oldenburg, 2018. http://d-nb.info/1176106570/34.
Повний текст джерелаHeese-Gärtlein, Justus [Verfasser], and Malte [Akademischer Betreuer] Behrens. "Manganese oxides as electrocatalysts in water oxidation : synthesis, characterization and their activity in the oxygen evolution reaction / Justus Heese-Gärtlein ; Betreuer: Malte Behrens." Duisburg, 2018. http://d-nb.info/119169433X/34.
Повний текст джерелаChouchelamane, Gael. "Preparation and characterisation of Pt/C and Ni/C modified electrocatalysts for use towards the oxygen reduction reaction for proton exchange membrane fuel cells." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/187737/.
Повний текст джерелаRück, Marlon [Verfasser], Alessio [Akademischer Betreuer] Gagliardi, Alessio [Gutachter] Gagliardi, Aliaksandr S. [Gutachter] Bandarenka, and Carlo Aldo [Gutachter] Di. "Data-Driven Design of Platinum Electrocatalysts for Efficient Oxygen Reduction / Marlon Rück ; Gutachter: Alessio Gagliardi, Aliaksandr S. Bandarenka, Aldo Di Carlo ; Betreuer: Alessio Gagliardi." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1221279793/34.
Повний текст джерелаYuan, Kai, Xiaodong Zhuang, Haiyan Fu, Gunther Brunklaus, Michael Forster, Yiwang Chen, Xinliang Feng, and Ullrich Scherf. "Two-Dimensional Core-Shelled Porous Hybrids as Highly Efficient Catalysts for Oxygen Reduction Reaction." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-235469.
Повний текст джерелаFavaro, Marco. "A rational approach to the optimization of efficient electrocatalysts for the next generation Fuel Cells." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3424667.
Повний текст джерелаIl progetto di dottorato nasce all’interno del gruppo di ricerca di Superfici e Catalizzatori operante nel dipartimento di Scienze Chimiche, nell’ambito della borsa a titolo vincolato “Un approccio razionale alla ottimizzazione di elettrocatalizzatori efficienti per le celle a combustibile di nuova generazione”, finanziata da fondazione CARIPARO. Le tematica è stata focalizzata sulla preparazione e caratterizzazione di nuovi materiali a base di carbonio utilizzabili per applicazioni in celle a combustibile di tipo PEMFCs (Polymer Electrolyte Membrane Fuel Cells) ad ossigeno-idrogeno. La preparazione dei materiali è avvenuta facendo uso di differenti tecniche, in relazione al tipo di materiale oggetto di studio ed alle applicazioni che tali materiali possono offrire. Con riferimento allo studio dei sistemi modello (grafite pirolitica altamente orientata, HOPG, e carbonio vetroso, GC), il drogaggio degli stessi mediante l’introduzione di eteroatomi (in particolare azoto) è avvenuto ricorrendo alla tecnica dell’impiantazione ionica, mentre lo studio di nuove funzionalità chimiche è stato permesso dall’utilizzo di tecniche di Wet Chemistry, in particolare mutuate dalla sintesi elettrochimica. La deposizione di film sottili o di nanoparticelle (metalliche o a base di ossidi di metalli di transizione) su tali materiali modificati è stata effettuata facendo uso di tecniche avanzate come la deposizione fisica da fase vapore (PVD) in condizioni controllate di Ultra Alto Vuoto (UHV), in grado di offrire un controllo su scala atomica della deposizione di tali film. Sono state utilizzate anche tecniche di deposizione tradizionali quali la riduzione chimica o elettrochimica di opportuni precursori metallici: l‘utilizzazione di una siffatta combinazione sinergica tra tali differenti tecniche di preparazione ha permesso di ottenere materiali caratterizzati da strutture e proprietà peculiari. La caratterizzazione di tali materiali è svolta utilizzando le facilities del gruppo di Scienza delle Superfici, come la spettroscopia di fotoelettroni (XPS) o della banda di valenza (UPS), la microscopia ad effetto tunnel o a forza atomica (STM - AFM), la microscopia elettronica e la dispersione energetica dei raggi X indotta dagli elettroni (SEM-EDX), la diffrazione di elettroni lenti (LEED). Allo scopo di caratterizzare maggiormente in dettaglio la struttura e le proprietà chimiche dei materiali preparati sono state usate estensivamente le tecniche di indagine offerte dalla luce di sincrotrone (HR-XPS, NEXAFS, ARPES, ResPES, PEEM), mentre lo studio della reattività catalitica si basa su tecniche derivate dall’analisi elettrochimica, in particolare la voltammetria ciclica ed a scansione lineare del potenziale applicato, nonchè tecniche elettro-dinamiche come la voltammetria su elettrodo rotante. Infine, allo scopo di supportare i dati sperimentali o portare la comprensione delle proprietà dei materiali ad un livello più profondo, simulazioni mediante teoria del funzionale densità (DFT) sono state adottate per un approccio critico allo studio dei materiali preparati (in collaborazione con il gruppo coordinato dalla prof. Cristiana Di Valentin, Università di Milano Bicocca). Durante il corso del dottorato, diverse collaborazioni sono state perseguite con gruppi interni al Dipartimento di Scienze Chimiche o anche Esteri, come l’unità di ricerca “Interfaces and Energy Conversion E19”, dell’università tecnica di Monaco di Baviera (TUM, Technische Universität München, Germania), coordinata dai proff. O. Schneider e J. Kunze-Liebhäuser.
Gao, Guoping. "Computational design of catalysts for clean energy conversion and storage." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/109443/1/Guoping_Gao_Thesis.pdf.
Повний текст джерела