Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Hydrogen Electrode"”.
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Hydrogen overvoltage on titanium
<p>"The hydrogen overvoltage has been defined as the difference between the potential of the working electrode (cathode) and the theoretical reversible value for the same solution. This definition brings out the difficulty involved in the measurement of the "theoretical reversible potential for the …
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Low temperature electrocatalytic reduction of carbon dioxide utilizing room temperature ionic liquids
… observed at -250mV with respect to a standard hydrogen electrode compared to 800mV in the absence of the ionic liquid. Thus, CO2 conversion to CO can occur without the large energy loss associated with a high overpotential raising the possibility of practical artificial photosynthesis. The …
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Low temperature electrocatalytic reduction of carbon dioxide utilizing room temperature ionic liquids
… observed at -450mV with respect to a standard hydrogen electrode (SHE), compared to 800mV in the absence of the ionic liquid. Thus, CO2 conversion to CO can occur without the large energy loss associated with a high overpotential, raising the possibility of practical artificial photosynthesis. …
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Towards the development of calcium ion batteries
… solid-liquid metal slush counter and reference electrodes utilizing inert molybdenum, borosilicate glass, and polytetrafluoroethylene cell components. The counter and reference electrodes consist of saturated calcium amalgam and a calcium mercury intermetallic phase, denoted as CaHglI-Ca(Hg) sal …
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Electrochemical Deactivation of Nitrate, Arsenate, and Trichloroethylene
… iron oxides, and boron doped diamond film electrode surfaces, respectively. Nitrate ( ) is a common co-contaminant at sites remediated using permeable reactive barriers (PRBs). Therefore, understanding nitrate reactions with ZVI is important for understanding the performance of PRBs. This …
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Fabrication And Characterization Of Solid Oxide Cells for Energy Conversion and Storage
… both in electrolysis mode by generating hydrogen through steam electrolysis and fuel cell mode by electrochemically combining fuel with oxidant. The present work is devoted to performing a fundamental study of SOC in both fuel cell mode for power generation and electrolysis mode for fuel …
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Nuclear Magnetic Resonance Studies of Lithium Metal Anodes
… reduction potential (-3.04 V vs. the standard hydrogen electrode). However, lithium metal batteries suffer from low capacity retention, short cycle life and safety problems associated with microstructural and dendritic growth of lithium. In this work, nuclear magnetic resonance (NMR) …
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SECONDARY INTERACTIONS WHICH MODIFY REDOX AND OTHER PROPERTIES OF ORGANOMETALLIC SYSTEMS
… sphere interactions of metal centres involving hydrogen bonding, ion-pairing or dipolar bonding can play an important role in determining the physical and chemical properties of molecular and biomolecular systems. For example, the redox potentials of cubane iron-sulfur clusters in a redox …
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Electrochemical and spectroscopic insights into the electroreduction of carbon dioxide to value added chemicals
… of 3,5-diamino-1,2,4-triazole (DAT) as an electrodeposition inhibitor. All three Cu-based electrodes exhibit high Faradaic efficiency (FE) of CO2 reduction toward C2H4 production. The CuSn-DAT electrode exhibits the highest FE for CO (~90% at -0.4 V) and C2H4 (~60% at -0.8 V) production and …
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High oxygen permeation rates through poly(dimethyl siloxane) for fuel cells and oxygen reduction reaction mechanistic studies
… ambient, high-energy (1.23 V vs. normal hydrogen electrode) hole source to complete the electrochemical redox circuit. Oxygen mass transport and electrochemical overpotential losses however represent the largest efficiency losses in conventional polymer electrolyte membrane (PEM) fuel …
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Investigating novel bacterial laccases with biotechnologically relevant attributes
… recorded an E1/2 value of 780 mV vs. the normal hydrogen electrode (NHE). Meanwhile, a midpoint potential of 775 mV vs. NHE was measured for TvL, approximately 10 mV lower than its redox potential described in the literature. Therefore, the present research reports the occurrence of a bacterial …
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Functional Metal Oxide Coatings from Molecular Precursors for Energy Applications
… potential by 0.12 V to 0.21 V vs. the reversible hydrogen electrode (RHE) and increases the maximum photocurrent density by ∼50% to 2.41 mA cm<sup>-2</sup> compared to the uncoated BiVO<sub>4</sub>. In the next chapter, a new solution deposition method to coat the Li-ion battery cathode …
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Interface Engineering and Substrate Design for Anode-free Lithium Metal Batteries
… potential (−3.04 V versus the standard hydrogen electrode) among common metal anodes. These merits enable energy densities approximately double those of conventional lithium-ion batteries with graphite anodes. However, the practical application of LMBs remains limited by unstable cycling …
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Designing Electrocatalysts for the Production and Oxidation of Liquid Fuels
… potential of 1.23 V vs. the reversible hydrogen electrode, make OER an ideal reaction to pair with other transformations. However, the slow kinetics of OER significant hinder the efficiency of these processes. As such, discovering new OER catalysts with high activity and stability would …
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Synthesis and Characterization of Bi-functional (ORR/OER) Nano-catalysts in Alkaline Media
… onset potential of 1.52V versus the reversible hydrogen electrode (RHE) during the OER, which makes it a state-of-the-art bi-functional electrocatalyst. The second research objective was achieved by the development of a modified SSM application to synthesize functionalized CNTs. Furthermore, …
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Mechanistic Studies of Interfacial Proton-Coupled Electron Transfer to Molecularly Defined Surface Sites
… formation or oxidative scission of a surface-hydrogen bond in an interfacial proton-coupled electron transfer (I PCET) reaction. Whether as an intermediate step in electrocatalysis or a stoichiometric charging step in a psuedocapacitor, regardless if involved in product formation or solution …
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Immobilising and Interfacing Poly(Heptazine Imide) Ionic Carbon Nitride for Photo(electro)catalytic Fuel and Chemical Production
… and enzyme-based catalysts for CO2-reduction and hydrogen production with record photocurrents and stabilities. State-of-the-art cyanamide-functionalised poly(heptazine imide) (PHI) ionic carbon nitride (NCNCNx) electrodes were produced by co-deposition with indium tin oxide (ITO) nanoparticles, …
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